Micro mixer and preparation method thereof, and preparation method of stable hydrogen peroxide solution
阅读说明：本技术 微混合器及其制备方法和双氧水的稳定液的制备方法 (Micro mixer and preparation method thereof, and preparation method of stable hydrogen peroxide solution ) 是由 贾学五 张帆 钱亚男 刘静如 王振刚 徐伟 于 2020-05-25 设计创作，主要内容包括：本发明涉及化工技术领域,公开了一种微混合器及其制备方法和双氧水的稳定液的制备方法,所述微混合器包括微混合器本体,所述微混合器本体内设置有微混通道,所述微混通道设置有将进入到所述微混合器本体内的亲水溶液和亲油溶液混合形成混合溶液的亲水部和亲油部,从而使得所述亲水溶液和所述亲油溶液能够混合均匀。所述微混合器的制备方法包括步骤S10：在所述微混合器本体内设置微混通道,并使得所述微混通道具有亲水部和亲油部,以将进入到所述微混合器本体内的亲水溶液和亲油溶液混合形成混合溶液。将含有氢蒽醌的氢化液和磷酸溶液加入到上述微混合器中进行混合以形成双氧水的稳定液。(The invention relates to the technical field of chemical industry, and discloses a micro mixer, a preparation method thereof and a preparation method of a stable hydrogen peroxide solution. The preparation method of the micromixer comprises the following steps of S10: a micro-mixing channel is arranged in the micro-mixer body and is provided with a hydrophilic part and an oleophilic part so as to mix the hydrophilic solution and the oleophilic solution entering the micro-mixer body to form a mixed solution. Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the micro mixer, and mixing to form stable hydrogen peroxide solution.)
1. A micro mixer is characterized in that the micro mixer (10) comprises a micro mixer body (12), a micro mixing channel (120) is arranged in the micro mixer body (12), and the micro mixing channel (120) is provided with a hydrophilic part and an oleophylic part which are used for mixing a hydrophilic solution and an oleophylic solution entering the micro mixer body (12) to form a mixed solution.
2. A micromixer according to claim 1, characterized in that said micromixer channel (120) comprises a plurality of hydrophilic channels (110) and a plurality of oleophilic channels (112), said plurality of hydrophilic channels (110) and said plurality of oleophilic channels (112) being alternately distributed in the flow direction of the liquid.
3. Micromixer according to claim 2, characterized in that the micromixer channels (120) are undulated.
4. A micromixer according to claim 3, characterized in that the angle of the central axis of said hydrophilic channel (110) to the direction of extension of the micromixer body (12) is between 10 ° and 80 °, preferably the angle of the central axis of said hydrophilic channel (110) to the direction of extension of the micromixer body (12) is between 30 ° and 70 °.
5. A micromixer according to claim 3, characterized in that the angle formed by the central axis of said oleophilic channel (112) and the direction of extension of the micromixer body (12) is between 10 ° and 80 °, preferably the angle formed by the central axis of said oleophilic channel (112) and the direction of extension of the micromixer body (12) is between 30 ° and 70 °.
6. A micromixer according to claim 2, characterized in that the wall surfaces of said hydrophilic channels (110) are formed with hydrophilic groups.
7. The micromixer according to claim 2, characterized in that the wall of said lipophilic channels (112) is formed with lipophilic groups.
8. A micromixer according to claim 2, characterized in that the width of said hydrophilic channels (110) is comprised between 0.01mm and 3 mm; and/or
The width of the oleophylic channel (112) is 0.01mm-3 mm.
9. A micromixer according to any of claims 2 to 8, characterized in that said micromixer body (12) is provided with a first inlet (122) for the entry of said hydrophilic solution communicating with said micromixer channel (120), a second inlet (124) for the entry of said lipophilic solution communicating with said micromixer channel (120) and an outlet (126) for the exit of said mixed solution communicating with said micromixer channel (120).
10. A micromixer according to claim 9, characterized in that a premixing channel (14) communicating with said micromixing channel (120) is provided in said micromixer body (12), said premixing channel (14) comprising a straight channel (140) having one end connected to said micromixing channel (120), said premixing channel (14) comprising a first channel (142) communicating the other end of said straight channel (140) with said first inlet (122) and a second channel (144) communicating the other end of said straight channel (140) with said second inlet (124).
11. Micromixer according to claim 10, characterized in that said first channel (142) is arc-shaped and said first channel (142) bulges in a direction away from the flow direction of the liquid in said straight channel (140) and/or
The second channel (144) is arcuate and the second channel (144) bulges away from the direction of flow of the liquid in the straight channel (140).
12. A micromixer according to claim 9, characterized in that a lead-out channel (16) is provided in the micromixer body (12) communicating the micromixer channel (120) with the outlet (126).
13. A micromixer according to claim 9, characterized in that said micromixer body (12) comprises a base plate (123), the side walls of said base plate (123) being provided with grooves to form said micromixer channels (120), said micromixer body (12) comprising a cover plate (125) which can be mated with said base plate (123) to cover said grooves, said first inlet (122), said first inlet (124) and said outlet (126) being provided in said cover plate (125).
14. A method of preparing a micromixer, characterized in that the micromixer (10) comprises a micromixer body (12), the method of preparing the micromixer comprising:
step S10: a micro-mixing channel (120) is provided within the micro-mixer body (12) and such that the micro-mixing channel (120) has a hydrophilic portion and an oleophilic portion to mix the hydrophilic and oleophilic solutions entering into the micro-mixer body (12) to form a mixed solution.
15. A method of preparing a micromixer according to claim 13, characterized in that said micromixer body (12) comprises a base plate (123) and a cover plate (125);
the step S10 includes:
step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate (123), and the grooves are wavy and extend along the flowing direction of the liquid to form the micro-mixing channel (120);
step S10 b: selecting the spaced grooves as first grooves and enabling the wall surfaces of the first grooves to form hydrophilic groups to form hydrophilic channels (110), and selecting the remaining spaced grooves as second grooves and enabling the wall surfaces of the second grooves to form oleophilic groups to form oleophilic channels (112);
the preparation method of the micromixer comprises the following steps:
step S20: three through holes are formed in the cover plate (125) to respectively form a first inlet (122) for the hydrophilic solution to enter, a second inlet (124) for the lipophilic solution to enter and an outlet (126) for the mixed solution to discharge;
step S30: -joining the cover plate (125) and the base plate (123) to each other such that the cover plate (125) covers the micro-mixing channel (120) and such that the first inlet (122), the second inlet (124) communicate with one end of the micro-mixing channel (120) and such that the outlet (126) communicates with the other end of the micro-mixing channel (120).
16. The method of claim 14, wherein the substrate (123) is made of one or more polymers having lipophilic groups and hydrophilic groups formed by the lipophilic groups under corresponding conditions, and in step S10b, the first recesses are irradiated with uv light under vacuum conditions to form hydrophilic groups on the walls of the first recesses.
17. The method of claim 14, wherein the dose of the ultraviolet radiation is 1 to 100kJ/cm2(ii) a And/or
The vacuum degree is not more than 0.01 MPa.
18. A method for preparing a stable solution of hydrogen peroxide, characterized in that a hydrogenated solution containing hydroanthraquinone and a phosphoric acid solution are added into the micro mixer (10) of any one of claims 1 to 12 and mixed to form the stable solution of hydrogen peroxide.
19. A method for preparing a stable solution of hydrogen peroxide according to claim 18, wherein the ratio of the flow rate of the phosphoric acid solution to the flow rate of the hydrogenated liquid is the flow rate of the phosphoric acid solution: the flow rate of the hydrogenation liquid is 1: (5-30); preferably, the flow rate of the phosphoric acid solution and the flow rate of the hydrogenation solution are in a ratio of the flow rate of the phosphoric acid solution: the flow rate of the hydrogenation liquid is 1: (10-15).
20. The method for preparing a stable solution of hydrogen peroxide according to claim 18, wherein the mass concentration of the phosphoric acid solution is 40-85%.
21. The method for producing a stable hydrogen peroxide solution according to claim 18, wherein the phosphoric acid solution and the hydrogenated liquid are mixed at a temperature of not more than 50 ℃.
Technical Field
The invention relates to the technical field of chemical industry, in particular to a micro mixer and a preparation method thereof, and a preparation method of stable hydrogen peroxide solution.
Background
With the rise of the micro-chemical industry, people have conducted more and more researches on the fields of small size and rapid process. Taking a micro mixer as an example, the current micro mixer has a micro pipe, which can mix two solutions and make the two solutions react with each other. However, the hydrophilic solution and the lipophilic solution cannot be uniformly mixed by the conventional mixer.
Disclosure of Invention
The invention aims to solve the problem that the prior mixer can not uniformly mix hydrophilic solution and lipophilic solution, and provides a micro mixer, wherein a micro mixing channel of the micro mixer is provided with a hydrophilic part and an oleophilic part which are used for mixing the hydrophilic solution and the oleophilic solution entering the micro mixer to form mixed solution.
In order to achieve the above object, an aspect of the present invention provides a micro mixer including a micro mixer body having a micro mixing channel provided therein, the micro mixing channel being provided with a hydrophilic portion and an oleophilic portion that mix a hydrophilic solution and an oleophilic solution entering the micro mixer body to form a mixed solution.
According to the technical scheme, the hydrophilic part capable of being compatible with the hydrophilic solution and the oleophilic part capable of being compatible with the oleophilic solution are arranged on the micro-mixing channel, so that the hydrophilic solution and the oleophilic solution can be uniformly mixed to obtain a water-in-oil solution or an oil-in-water solution, and the mixed solution stably exists.
Preferably, the micro-mixing channel comprises a plurality of hydrophilic channels and a plurality of lipophilic channels, which are alternately distributed in the flow direction of the liquid.
Preferably, the micro-mixing channel is corrugated.
Preferably, the included angle formed by the central axis of the hydrophilic channel and the extending direction of the micro mixer body is 10-80 degrees, and preferably, the included angle formed by the central axis of the hydrophilic channel and the extending direction of the micro mixer body is 30-70 degrees.
Preferably, the included angle formed by the central axis of the oleophilic channel and the extending direction of the micro mixer body is 10-80 degrees, and preferably, the included angle formed by the central axis of the oleophilic channel and the extending direction of the micro mixer body is 30-70 degrees.
Preferably, the wall surface of the hydrophilic channel is formed with a hydrophilic group.
Preferably, the wall surface of the lipophilic channel is formed with a lipophilic group.
Preferably, the width of the hydrophilic channel is 0.01mm-3 mm; and/or
The width of the oleophylic channel is 0.01mm-3 mm.
Preferably, the micro mixer body is provided with a first inlet communicated with the micro mixing channel and used for the hydrophilic solution to enter, a second inlet communicated with the micro mixing channel and used for the lipophilic solution to enter, and an outlet communicated with the micro mixing channel and used for the mixed solution to be discharged.
Preferably, a premixing channel communicated with the micro mixing channel is arranged in the micro mixer body, the premixing channel comprises a straight channel with one end connected with the micro mixing channel, and the premixing channel comprises a first channel communicated with the other end of the straight channel and the first inlet and a second channel communicated with the other end of the straight channel and the second inlet.
Preferably, the first channel is arcuate and the first channel bulges away from the direction of flow of the liquid in the straight channel, and/or
The second channel is arcuate and bulges in a direction away from a flow direction of the liquid in the straight channel.
Preferably, a guide-out channel communicating the micro-mixing channel and the outlet is arranged in the micro-mixer body.
Preferably, the micro mixer body includes a base plate, a groove is provided on a side wall of the base plate to form the micro mixing channel, the micro mixer body includes a cover plate which can be assembled with the base plate to cover the groove, and the first inlet, the first inlet and the outlet are provided on the cover plate.
The invention provides a preparation method of a micro mixer, which is characterized in that the micro mixer comprises a micro mixer body, and the preparation method of the micro mixer comprises the following steps: step S10: a micro-mixing channel is arranged in the micro-mixer body and is provided with a hydrophilic part and an oleophilic part so as to mix the hydrophilic solution and the oleophilic solution entering the micro-mixer body to form a mixed solution.
The hydrogenation solution containing hydroanthraquinone and the phosphoric acid solution are added into a micro mixer, so that the two can be uniformly mixed to form a uniform water-in-oil solution. And introducing the stable liquid into an oxidation tower for oxidation reaction to obtain hydrogen peroxide, wherein the stable liquid can exist stably, so that the phosphoric acid is not easy to separate out in the oxidation tower, and the consumption of the phosphoric acid is reduced by about more than 50%.
Preferably, the micromixer body comprises a base plate and a cover plate;
the step S10 includes:
step S10 a: a plurality of grooves which are mutually communicated are engraved on the substrate, and the grooves are wavy and extend along the flow direction of the liquid to form the micro-mixing channel;
step S10 b: selecting the spaced grooves as first grooves and enabling the wall surfaces of the first grooves to form hydrophilic groups so as to form hydrophilic channels, and selecting the remaining spaced grooves as second grooves and enabling the wall surfaces of the second grooves to form lipophilic groups so as to form lipophilic channels;
the preparation method of the micromixer comprises the following steps:
step S20: three through holes are formed in the cover plate to respectively form a first inlet for the hydrophilic solution to enter, a second inlet for the lipophilic solution to enter and an outlet for the mixed solution to discharge;
step S30: the cover plate and the base plate are spliced to each other such that the cover plate covers the micro-mixing channel, and such that the first inlet, the second inlet and the outlet communicate with one end of the micro-mixing channel and the other end of the micro-mixing channel.
Preferably, the substrate is made of a high polymer having an oleophilic group and generating a hydrophilic group under corresponding conditions, and in step S10b, ultraviolet rays are selected to irradiate the first groove under vacuum conditions so that the wall surface of the first groove forms the hydrophilic group.
Preferably, the dose of the ultraviolet rays is 1 to 100kJ/cm2(ii) a And/or
The vacuum degree is not more than 0.01 MPa.
In a third aspect of the invention, a preparation method of a stable solution of hydrogen peroxide is provided, wherein a hydrogenated solution containing hydroanthraquinone and a phosphoric acid solution are added into the micro mixer provided by the invention and mixed to form the stable solution of hydrogen peroxide.
Preferably, the flow rate of the phosphoric acid solution and the flow rate of the hydrogenation solution are in a ratio of the flow rate of the phosphoric acid solution: the flow rate of the hydrogenation liquid is 1: (5-30); preferably, the flow rate of the phosphoric acid solution and the flow rate of the hydrogenation solution are in a ratio of the flow rate of the phosphoric acid solution: the flow rate of the hydrogenation liquid is 1: (10-15).
Preferably, the mass concentration of the phosphoric acid solution is 40-85%.
Preferably, the phosphoric acid solution amount and the hydrogenation solution are mixed at a temperature of not more than 50 ℃.
Drawings
FIG. 1 is a schematic view showing the overall construction of a mixing apparatus according to a preferred embodiment of the present invention;
fig. 2 is a schematic sectional structure view of a micromixer according to a preferred embodiment of the present invention;
fig. 3 is a schematic front view of a micro mixer according to a preferred embodiment of the present invention.
Description of the reference numerals
10-micromixer; 12-micromixer body; 120-a micro-mixing channel; 110-hydrophilic channels; 112-a lipophilic channel; 122 — a first inlet; 123-a substrate; 124-a second inlet; 125-cover plate; 126-an outlet; 14-a premix passage; 140-a straight channel; 142-a first channel; 144-a second channel; 16-a lead-out channel; 20-a mixing device; 21-a first delivery pipe; 22-a storage tank; 23-a second delivery pipe; 24-a first delivery pump; 25-a mixed liquid conveying pipe; 26-second delivery pump.
Detailed Description
In the present invention, the use of directional terms such as "upper, lower, left and right" in the absence of a contrary explanation generally means that the directions shown in the drawings and the practical application are considered to be the same, and "inner and outer" mean the inner and outer of the outline of the component.
The invention provides a micro mixer, wherein a micro mixer 10 comprises a micro mixer body 12, a micro mixing channel 120 is arranged in the micro mixer body 12, and the micro mixing channel 120 is provided with a hydrophilic part and an oleophilic part which are used for mixing hydrophilic solution and oleophilic solution entering the micro mixer body 12 to form mixed solution. By providing the hydrophilic part capable of being compatible with the hydrophilic solution and the lipophilic part capable of being compatible with the lipophilic solution on the micro-mixing channel 120, the hydrophilic solution and the lipophilic solution can be uniformly mixed to obtain a water-in-oil solution or an oil-in-water solution, and the mixed solution stably exists. It should be noted that the hydrophilic solution may include water, an aqueous solution, and a solution capable of dissolving in water, for example, an acid solution such as a phosphoric acid solution, and the lipophilic solution may be understood as a solution incapable of dissolving in water, that is, the lipophilic solution may be a solution having hydrophobicity, for example, an organic solution in which an organic substance such as hydroanthraquinone is dispersed, and the mixed solution may be an aqueous oil solution or an oil-in-water solution formed by mixing the hydrophilic solution and the lipophilic solution.
As shown in fig. 2, micro-mixing channel 120 may include a plurality of hydrophilic channels 110 and a plurality of lipophilic channels 112, the plurality of hydrophilic channels 110 and the plurality of lipophilic channels 112 being alternately distributed in the flow direction of the liquid, thereby making it possible to more uniformly mix the hydrophilic solution and the lipophilic solution to obtain a water-in-oil solution or an oil-in-water solution. Specifically, the initial channel of the micro-mixing channel 120 can be an oleophilic channel 112 and the terminal channel of the micro-mixing channel 120 can be a hydrophilic channel 110. The flow direction of the liquid refers to the overall flow direction of the mixed solution after the hydrophilic solution and the lipophilic solution are mixed, i.e., the linear direction connecting the two ends of the micro mixing channel 120.
In addition, the wall surface of the hydrophilic channel 110 may be formed with hydrophilic groups such as hydroxyl groups, so that the hydrophilic channel 110 can be made to have affinity with the hydrophilic solution by the hydrophilic groups; in addition, the walls of oleophilic channel 112 may be formed with oleophilic groups, such as alkyl groups, for example, methyl groups, such that oleophilic channel 112 may have an affinity for the oleophilic solution via the hydrophilic groups.
It will be appreciated that a first inlet 122 communicating with the micro-mixing channel 120 for the hydrophilic solution, a second inlet 124 communicating with the micro-mixing channel 120 for the lipophilic solution, and an outlet 126 communicating with the micro-mixing channel 120 for the mixed solution to exit may be provided on the micro-mixer body 12. Wherein the first inlet 122 and the second inlet 124 may be located at one end of the micro-mixing channel 120 and the outlet 126 may be located at the other end of the micro-mixing channel 120.
As shown in fig. 2 and 3, the micro mixer body 12 may include a base plate 123, a groove may be provided on a side wall of the base plate 123 to form the micro mixing channel 120, the micro mixer body 12 may include a cover plate 125 which may be combined with the base plate 123 to cover the groove, i.e., the micro mixing channel 120, and the first inlet 122, the first inlet 124, and the outlet 126 may be provided on the cover plate 125.
It should be noted that, the substrate 123 may be prepared by using a material having a hydrophobic group, such as polydimethylsiloxane (PDMS for short), and then a plurality of channels communicating with each other are etched on the substrate 123, wherein the selected and spaced channels are subjected to a corresponding treatment, such as uv irradiation under a vacuum condition, so that hydrophilic groups, such as hydroxyl groups, are formed on the surfaces of the channels to form the hydrophilic channels 110, and the remaining spaced channels form the lipophilic channels 112 due to the hydrophobic groups on the surfaces of the channels.
To further improve the uniformity of mixing, the micro-mixing channel 120 may be corrugated, as shown in FIG. 2.
Wherein the angle formed by the central axis of the hydrophilic channel 110 and the extending direction of the micro mixer body 12 may be 10 ° to 80 °, whereby the uniformity of mixing may be further improved, and preferably, the angle formed by the central axis of the hydrophilic channel 110 and the extending direction of the micro mixer body 12 may be 30 ° to 70 °. It will be appreciated that the central axis of the hydrophilic channel 110 is parallel to the direction of flow of the liquid through the hydrophilic channel 110, and that the micromixer body 12 may be elongate and that the micromixer body 12 may extend in the direction of extension of the line connecting the two ends of the micromixer channel 120.
The angle formed by the central axis of oleophilic channel 112 and the direction of extension of micro-mixer body 12 may be 10 ° -80 °, whereby the uniformity of mixing may be further improved, preferably the angle formed by the central axis of oleophilic channel 112 and the direction of extension of micro-mixer body 12 may be 30 ° -70 °. It will be appreciated that the central axis of oleophilic channel 112 is parallel to the flow direction of the liquid flowing through oleophilic channel 112.
Under the combined action of the hydrophilic channels 110 and the lipophilic channels 112, the hydrophilic part and the lipophilic part in the mixed solution are alternately adsorbed to the corresponding channels, which means that if the hydrophilic part is adsorbed to the hydrophilic channels 110 and the lipophilic part is adsorbed to the lipophilic channels 112, then the mixed solution flowing through the channels is flushed, and the process is repeated, so that the liquid is violently collided, the mixing uniformity is improved, and the water-in-oil solution or the oil-in-water solution is obtained.
The width of the hydrophilic channel 110 may be 0.01mm to 3mm, whereby the smooth passage of the liquid and the more uniform mixing of the liquid may be enabled, wherein the width of the hydrophilic channel 110 may be understood as a distance between both sides of the hydrophilic channel 110 in the flow direction of the liquid within the hydrophilic channel 110, and preferably, the width of the hydrophilic channel 110 may be 0.05mm to 2 mm.
In addition, the width of oleophilic channel 112 may be 0.01mm to 3mm, thereby allowing smooth passage of liquid and more uniform mixing of liquid, wherein the width of oleophilic channel 112 may be understood as the distance between the two sides of oleophilic channel 112 in the flow direction of liquid within oleophilic channel 112, and preferably, the width of oleophilic channel 112 may be 0.05mm to 2 mm.
As shown in fig. 2, a premixing channel 14 communicating with the micro mixing channel 120 may be provided in the mixer body 12, the premixing channel 14 may include a straight channel 140 having one end connected with the micro mixing channel 120, and specifically, one end of the straight channel 140 may be connected with an entrance end of an initial channel of the micro mixing channel 120, the premixing channel 14 may include a first channel 142 communicating the other end of the straight channel 140 with the first inlet 122 and a second channel 144 communicating the other end of the straight channel 140 with the second inlet 124, wherein the hydrophilic solution is introduced from the first inlet 122 and enters the straight channel 140 through the first channel 142, the lipophilic solution is introduced from the second inlet 124 and enters the straight channel 140 through the second channel 144, and the hydrophilic solution and the lipophilic solution are mixed in the straight channel 140. By providing a premix passage 14, the hydrophilic solution and the lipophilic solution can be mixed more uniformly.
Wherein the first channel 142 may be curved and the first channel 142 may be bulged in a direction away from the flow direction of the liquid in the straight channel 140, which may allow for better mixing of the hydrophilic solution and the lipophilic solution.
In addition, the second channel 144 may be curved and the second channel 144 may be bulged away from the direction of flow of the liquid in the straight channel 140, which may allow for better mixing of the lipophilic solution with the hydrophilic solution.
A discharge channel 16 connecting the micro-mixing channel 120 and the outlet 126 can be provided in the micro-mixer body 12, whereby the mixed solution can be discharged better.
The invention also provides a preparation method of the micro mixer, and the preparation method can be suitable for preparing the micro mixer 10 provided by the application. The micromixer 10 may include a micromixer body 12, and a method of preparing the micromixer includes step S10: a micro-mixing channel 120 is provided in the micro-mixer body 12, and the micro-mixing channel 120 is made to have a hydrophilic portion and an oleophilic portion to mix the hydrophilic solution and the oleophilic solution entering into the micro-mixer body 12 to form a mixed solution. By having micro-mixing channel 120 with the hydrophilic portion capable of affinity with the hydrophilic solution and the lipophilic portion capable of affinity with the lipophilic solution, the hydrophilic solution and the lipophilic solution can be mixed uniformly to obtain a water-in-oil solution or an oil-in-water solution.
To improve the uniformity of mixing, the micro-mixing channel 120 may be corrugated. In addition, a first inlet 122 communicating with the micro-mixing channel 120 for the hydrophilic solution, a second inlet 124 communicating with the micro-mixing channel 120 for the lipophilic solution, and an outlet 126 communicating with the micro-mixing channel 120 for the mixed solution to be discharged may be provided on the micro-mixer body 12. Wherein the first inlet 122 and the second inlet 124 are disposed at one end of the micro-mixing channel 120, and the outlet 126 is disposed at the other end of the micro-mixing channel 120.
The micromixer body 12 may include a base plate 123 and a cover plate 125; the step S10 may include: step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, for example, the grooves can be carved by a carving knife, and the grooves are wavy and extend along the flowing direction of the liquid to form the micro-mixing channel 120; step S10 b: the alternate grooves are selected as first grooves and the walls of the first grooves are made to form hydrophilic groups to form hydrophilic channels 110, and the remaining alternate grooves are selected as second grooves and the walls of the second grooves are made to form lipophilic groups to form lipophilic channels 112. It is understood that the plurality of hydrophilic channels 110 and the plurality of oleophilic channels 112 are in communication with each other and are in a wave shape, and the plurality of hydrophilic channels 110 and the plurality of oleophilic channels 112 are alternately distributed in the flow direction of the liquid.
In addition, the preparation method of the micromixer comprises the following steps: step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively; step S30: the cover plate 125 and the base plate 123 are assembled to each other such that the cover plate 125 covers the micro-mixing channel 120 and such that the first inlet 122, the second inlet 124 communicate with one end, i.e., the inlet end, of the micro-mixing channel 120 and such that the outlet 126 communicates with the other end, i.e., the outlet end, of the micro-mixing channel 120.
Wherein the angle formed by the central axis of the first groove, i.e. the hydrophilic channel 110, and the extending direction of the micro mixer body 12 can be made to be 10 ° to 80 °, whereby the uniformity of mixing can be further improved, and preferably, the angle formed by the central axis of the hydrophilic channel 110 and the extending direction of the micro mixer body 12 can be made to be 30 ° to 70 °. It will be appreciated that the central axis of the hydrophilic channel 110 is parallel to the direction of flow of the liquid through the hydrophilic channel 110, and that the micromixer body 12 may be elongate and that the micromixer body 12 may extend in the direction of extension of the line connecting the two ends of the micromixer channel 120.
In addition, the angle formed by the central axis of the second groove, i.e., oleophilic channel 112, and the extending direction of micro-mixer body 12 may be made to be 10 ° to 80 °, whereby the uniformity of mixing may be further improved, and preferably, the angle formed by the central axis of oleophilic channel 112 and the extending direction of micro-mixer body 12 may be made to be 30 ° to 70 °. It will be appreciated that the central axis of oleophilic channel 112 is parallel to the flow direction of the liquid flowing through oleophilic channel 112.
Preferably, the material of the substrate 123 may be one or more polymers having lipophilic groups, and the lipophilic groups generate hydrophilic groups under corresponding conditions, such as light, for example, one or more polymers selected from Polycarbonate (PC), polymethyl methacrylate (PMMA), Polyarylsulfone (PASF) and Polydimethylsiloxane (PDMS), and in the step S10b, under vacuum condition,the first groove is irradiated with ultraviolet rays so that the wall surface of the first groove forms hydrophilic groups, for example, a large number of hydroxyl groups can be formed on the wall surface of the first groove so as to be able to have affinity with the hydrophilic portion in the mixed solution, and the wall surface of the second groove, which is not irradiated with ultraviolet rays, has a large number of hydrophobic groups so as to be able to have affinity with the lipophilic portion in the mixed solution. Wherein the dose of ultraviolet radiation is 1-100kJ/cm2Preferably, the dose of the ultraviolet ray may be 10 to 80kJ/cm2Further preferably, the dose of the ultraviolet ray irradiation may be 20 to 50kJ/cm2So as to ensure the generation of hydrophilic groups such as hydroxyl, and simultaneously ensure moderate strength and avoid waste; in addition, the degree of vacuum may be not more than 0.01MPa, and preferably, the degree of vacuum may be 0.001 to 0.01 to further increase the formation amount of hydrophilic groups. The substrate 123 may be placed at a temperature not higher than 50 ℃ to be subjected to ultraviolet irradiation, and preferably, the substrate 123 may be placed at room temperature to be subjected to ultraviolet irradiation.
In addition, after the ultraviolet irradiation, the hydrophilic group that can be formed by polycarbonate, polymethyl methacrylate, polyarylsulfone and polydimethylsiloxane is a hydroxyl group.
The width of the hydrophilic channel 110, which can be understood as the distance between both sides of the hydrophilic channel 110 in the flow direction of the liquid inside the hydrophilic channel 110, may be set to 0.01mm to 3mm, and thus the liquid can be smoothly passed and the mixing of the liquid can be more uniform, and preferably, the width of the hydrophilic channel 110 may be set to 0.05mm to 2 mm.
In addition, the width of oleophilic channel 112 may be set to 0.01mm to 3mm, thereby allowing smooth passage of liquid and more uniform mixing of liquid, wherein the width of oleophilic channel 112 may be understood as the distance between the two sides of oleophilic channel 112 in the flow direction of the liquid within oleophilic channel 112, and preferably, the width of oleophilic channel 112 may be 0.05mm to 2 mm.
In order to improve the uniformity of mixing, the premixing channel 14 communicating with the micro mixing channel 120 may be engraved on the base plate 123, and specifically, the straight channel 140 having one end connected with the micro mixing channel 120 may be engraved on the base plate 123, and it is understood that one end of the straight channel 140 may be connected with the entrance end of the initial channel of the micro mixing channel 120, and at the same time, a first channel 142 and a second channel 144 may be engraved, wherein the first channel 142 is made to communicate the other end of the straight channel 140 with the first inlet 122, and the second channel 144 is made to communicate the other end of the straight channel 140 with the second inlet 124, wherein the hydrophilic solution is introduced from the first inlet 122 and enters the straight channel 140 through the first channel 142, and the lipophilic solution is introduced from the second inlet 124 and enters the straight channel 140 through the second channel 144, and the hydrophilic solution and the lipophilic solution are mixed in the straight channel 140. Wherein, the width of the first channel 142 may be set to 0.01mm-3mm, the width of the second channel 144 may be set to 0.01mm-3mm, and the width of the straight channel 140 may be set to 0.01mm-3 mm.
Wherein the first channel 142 may be curved and the first channel 142 may be bulged away from the flow direction of the liquid in the straight channel 140, which may allow for a better mixing of the hydrophilic solution and the lipophilic solution.
In addition, the second channel 144 may be curved and the second channel 144 may be bulged away from the direction of flow of the liquid in the straight channel 140, which may allow for better mixing of the lipophilic solution with the hydrophilic solution.
The outlet channel 16 may be carved on the cover plate 123 such that the outlet channel 16 communicates with the micro-mixing channel 120 and the outlet 126, thereby allowing the mixed solution to be better discharged. The width of the outlet channel 16 may be 0.01mm-3 mm.
Thus, when the cover plate 125 and the base plate 123 are fitted to each other, the cover plate 125 covers the micro-mixing channel 120, and the first inlet 122 is made to communicate with the first channel 142, the second inlet 124 is made to communicate with the second channel 144, and the outlet 126 is made to communicate with the derivation channel 16.
The invention also provides a preparation method of the stable liquid of hydrogen peroxide, which comprises the step of adding the hydrogenated liquid containing anthraquinone and the phosphoric acid solution into the micro mixer 10 provided by the application for mixing to form the stable liquid of hydrogen peroxide. Generally, an anthraquinone process is selected to prepare hydrogen peroxide, wherein alkyl anthraquinone in a working solution prepared from alkyl anthraquinone and an organic solvent according to a certain proportion is subjected to hydrogenation reaction with hydrogen to generate corresponding hydrogenated liquid containing the hydrogen anthraquinone, wherein the hydrogenated liquid containing the hydrogen anthraquinone is a lipophilic solution, and the phosphoric acid solution is a hydrophilic solution. By adding the hydrogenated liquid containing hydroanthraquinone and the phosphoric acid solution to the micromixer 10, the two can be uniformly mixed to form a uniform water-in-oil solution. And (2) introducing the stable liquid into an oxidation tower for oxidation reaction to obtain hydrogen peroxide, wherein the stable liquid can exist stably, so that the phosphoric acid is not easy to precipitate in the oxidation tower, and the consumption of the phosphoric acid is greatly reduced.
As shown in fig. 1, there is provided a mixing device 20, the mixing device 20 including a micromixer 10, a storage tank 22 capable of storing a hydrophilic solution such as a phosphoric acid solution, a first delivery pipe 21 communicating a first inlet 122 of the micromixer 10 and the storage tank 22, and a first delivery pump 24 capable of pumping the hydrophilic solution such as a phosphoric acid solution provided on the first delivery pipe 21; the mixing device 20 comprises a mixed liquid delivery pipe 25 communicating with the outlet 126 for discharging said mixed solution, a second delivery pipe 23 communicating with the second inlet 124 for introducing a lipophilic solution, and a second delivery pump 26, the second delivery pump 26 being capable of pumping said mixed solution or lipophilic solution such as an organic solution containing hydroanthraquinone.
In order to make the two mixed better, the ratio of the flow rate of the phosphoric acid solution to the flow rate of the hydrogenation solution is that: the flow rate of the hydrogenation liquid is 1: (5-30); preferably, the flow rate of the phosphoric acid solution and the flow rate of the hydrogenation solution are in a ratio of the flow rate of the phosphoric acid solution: the flow rate of the hydrogenation liquid is 1: (10-15).
In addition, the mass concentration of the phosphoric acid solution is preferably 40-85%, so that the mixing effect can be improved, the two solutions are mixed more uniformly, and the mixed solution is more stable.
Further, the amount of phosphoric acid solution and the hydrogenation solution are preferably mixed at a temperature not exceeding 50 ℃, and preferably, the amount of phosphoric acid solution and the hydrogenation solution are preferably mixed at room temperature.
The stability is detected by a demulsification voltage method, a probe of an electrical stability tester is placed into the obtained mixed solution for testing, and the demulsification voltage is basically higher than 350V, so that the water-in-oil solution has good stability.
The technical effects of the present invention will be further described with reference to the following examples.
Examples
Example 1
Preparation of a micromixer 10 as shown in FIG. 2
Step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, and the grooves are wavy and extend along the flow direction of liquid to form a micro-mixing channel 120, wherein the substrate 123 is made of polydimethylsiloxane;
step S10 b: selecting the spaced grooves as first grooves, irradiating the first grooves with ultraviolet rays under vacuum to form hydrophilic groups on the wall surfaces of the first grooves to form hydrophilic channels 110, and using the remaining spaced grooves as second grooves having lipophilic groups on the wall surfaces to form lipophilic channels 112, wherein the degree of vacuum is 0.005MPa, and the dose of ultraviolet rays is 1kJ/cm2Under the irradiation at room temperature, the width of the hydrophilic channel 110 is 0.01mm, and the width of the lipophilic channel 112 is 0.01 mm;
step S10 c: a straight channel 140 having one end connected to an inlet end of the micro mixing channel 120 is cut on the substrate 123, and a first channel 142 for passing a hydrophilic solution and a second channel 144 for passing an oleophilic solution, both of which are communicated with the straight channel 140, are cut, wherein the first channel 142 is curved, and the first channel 142 is raised in a direction deviating from a flow direction of the liquid in the straight channel 140, the width of the first channel 142 is 0.01mm, the second channel 144 is curved, and the second channel 144 is raised in a direction deviating from the flow direction of the liquid in the straight channel 140, and the width of the second channel 144 is 0.01 mm;
step S10 d: the cover plate 123 is carved with a lead-out channel 16, and the lead-out channel 16 is communicated with the outlet end of the micro-mixing channel 120, and the width of the lead-out channel 16 can be 0.01 mm;
step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively;
step S30: the cover plate 125 and the base plate 123 are fitted to each other such that the cover plate 125 covers the micro-mixing channel 120, and such that the first inlet 122 communicates with the first channel 142, the second inlet 124 communicates with the second channel 144, and the outlet 126 communicates with the derivation channel 16.
Stable liquid for preparing hydrogen peroxide
Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the prepared micro mixer 10 at room temperature to form stable liquid of hydrogen peroxide, wherein the flow rate of the phosphoric acid solution and the flow rate of the hydrogenated liquid are as follows: the flow rate of the hydrogenation liquid is 1: and 5, wherein the mass concentration of the phosphoric acid solution is 40%.
Obtaining a substantially uniform water-in-oil solution, and detecting that the demulsification voltage is 370V.
Example 2
Preparation of a micromixer 10 as shown in FIG. 2
Step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, and the grooves are wavy and extend along the flow direction of liquid to form a micro-mixing channel 120, wherein the substrate 123 is made of polydimethylsiloxane;
step S10 b: selecting the spaced grooves as first grooves, irradiating the first grooves with ultraviolet rays under vacuum to form hydrophilic groups on the wall surfaces of the first grooves to form hydrophilic channels 110, and using the remaining spaced grooves as second grooves having lipophilic groups on the wall surfaces to form lipophilic channels 112, wherein the vacuum degree is 0.001MPa, and the ultraviolet irradiation dose is 10kJ/cm2Under the irradiation at room temperature, the width of the hydrophilic channel 110 is 0.1mm, and the width of the lipophilic channel 112 is 0.1 mm;
step S10 c: a straight channel 140 having one end connected to the inlet end of the micro mixing channel 120 is cut on the substrate 123, and a first channel 142 for passing a hydrophilic solution and a second channel 144 for passing an oleophilic solution, both of which are communicated with the straight channel 140, are cut, wherein the first channel 142 is curved, and the first channel 142 is raised in a direction deviating from the flow direction of the liquid in the straight channel 140, the width of the first channel 142 is 0.1mm, the second channel 144 is curved, and the second channel 144 is raised in a direction deviating from the flow direction of the liquid in the straight channel 140, and the width of the second channel 144 is 0.1 mm;
step S10 d: the cover plate 123 is engraved with the outlet channel 16, and the outlet channel 16 is communicated with the outlet end of the micro-mixing channel 120, and the width of the outlet channel 16 can be 0.1 m;
step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively;
step S30: the cover plate 125 and the base plate 123 are fitted to each other such that the cover plate 125 covers the micro-mixing channel 120, and such that the first inlet 122 communicates with the first channel 142, the second inlet 124 communicates with the second channel 144, and the outlet 126 communicates with the derivation channel 16.
Stable liquid for preparing hydrogen peroxide
Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the prepared micro mixer 10 at room temperature to form stable liquid of hydrogen peroxide, wherein the flow rate of the phosphoric acid solution and the flow rate of the hydrogenated liquid are as follows: the flow rate of the hydrogenation liquid is 1: 10, and the mass concentration of the phosphoric acid solution is 50%.
A substantially uniform water-in-oil solution was obtained with a demulsification voltage of 382V as detected.
Example 3
Preparation of a micromixer 10 as shown in FIG. 2
Step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, and the grooves are wavy and extend along the flow direction of liquid to form a micro-mixing channel 120, wherein the substrate 123 is made of polydimethylsiloxane;
step S10 b: selecting the spaced grooves as first grooves, irradiating the first grooves with ultraviolet rays under vacuum to form hydrophilic groups on the wall surfaces of the first grooves to form hydrophilic channels 110, and using the remaining spaced grooves as second grooves having lipophilic groups on the wall surfaces of the second grooves to form lipophilic channels 112, wherein the vacuum degree is 0.01MPa, and the ultraviolet irradiation dose is 30kJ/cm2Under the irradiation at room temperature, the width of the hydrophilic channel 110 is 0.5mm, and the width of the lipophilic channel 112 is 0.5 mm;
step S10 c: a straight channel 140 having one end connected to the inlet end of the micro mixing channel 120 is cut on the substrate 123, and a first channel 142 for passing a hydrophilic solution and a second channel 144 for passing an oleophilic solution, both of which are communicated with the straight channel 140, are cut, wherein the first channel 142 is curved, and the first channel 142 is raised in a direction away from the flow direction of the liquid in the straight channel 140, the width of the first channel 142 is 0.5mm, the second channel 144 is curved, and the second channel 144 is raised in a direction away from the flow direction of the liquid in the straight channel 140, and the width of the second channel 144 is 0.5 mm;
step S10 d: the cover plate 123 is carved with the outlet channel 16, and the outlet channel 16 is communicated with the outlet end of the micro-mixing channel 120, and the width of the outlet channel 16 can be 0.5 mm;
step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively;
step S30: the cover plate 125 and the base plate 123 are fitted to each other such that the cover plate 125 covers the micro-mixing channel 120, and such that the first inlet 122 communicates with the first channel 142, the second inlet 124 communicates with the second channel 144, and the outlet 126 communicates with the derivation channel 16.
Stable liquid for preparing hydrogen peroxide
Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the prepared micro mixer 10 at room temperature to form stable liquid of hydrogen peroxide, wherein the flow rate of the phosphoric acid solution and the flow rate of the hydrogenated liquid are as follows: the flow rate of the hydrogenation liquid is 1: 15, and the mass concentration of the phosphoric acid solution is 60%.
Obtaining a basically uniform water-in-oil solution, and detecting that the demulsification voltage is 387V.
Example 4
Preparation of a micromixer 10 as shown in FIG. 2
Step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, and the grooves are wavy and extend along the flow direction of liquid to form a micro-mixing channel 120, wherein the substrate 123 is made of polydimethylsiloxane;
step S10 b: selecting the spaced grooves as first grooves, irradiating the first grooves with ultraviolet rays under vacuum to form hydrophilic groups on the wall surfaces of the first grooves to form hydrophilic channels 110, and using the remaining spaced grooves as second grooves having lipophilic groups on the wall surfaces of the second grooves to form lipophilic channels 112, wherein the vacuum degree is 0.003MPa, and the ultraviolet irradiation dose is 70kJ/cm2Under the irradiation at room temperature, the width of the hydrophilic channel 110 is 1mm, and the width of the lipophilic channel 112 is 1 mm;
step S10 c: a straight channel 140 having one end connected to the inlet end of the micro mixing channel 120 is cut on the substrate 123, and a first channel 142 for passing a hydrophilic solution and a second channel 144 for passing an oleophilic solution, both of which are communicated with the straight channel 140, are cut, wherein the first channel 142 is curved, and the first channel 142 is raised in a direction away from the flow direction of the liquid in the straight channel 140, the width of the first channel 142 is 1mm, the second channel 144 is curved, and the second channel 144 is raised in a direction away from the flow direction of the liquid in the straight channel 140, and the width of the second channel 144 is 1 mm;
step S10 d: the cover plate 123 is engraved with the outlet channel 16, and the outlet channel 16 is communicated with the outlet end of the micro-mixing channel 120, and the width of the outlet channel 16 can be 1 mm;
step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively;
step S30: the cover plate 125 and the base plate 123 are fitted to each other such that the cover plate 125 covers the micro-mixing channel 120, and such that the first inlet 122 communicates with the first channel 142, the second inlet 124 communicates with the second channel 144, and the outlet 126 communicates with the derivation channel 16.
Stable liquid for preparing hydrogen peroxide
Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the prepared micro mixer 10 at room temperature to form stable liquid of hydrogen peroxide, wherein the flow rate of the phosphoric acid solution and the flow rate of the hydrogenated liquid are as follows: the flow rate of the hydrogenation liquid is 1: 20, and the mass concentration of the phosphoric acid solution is 70%.
A substantially homogeneous water-in-oil solution was obtained, which was tested to have a demulsification voltage of 369V.
Example 5
Preparation of a micromixer 10 as shown in FIG. 2
Step S10 a: a plurality of grooves which are mutually communicated are carved on the substrate 123, and the grooves are wavy and extend along the flow direction of liquid to form a micro-mixing channel 120, wherein the substrate 123 is made of polydimethylsiloxane;
step S10 b: selecting the spaced grooves as first grooves, irradiating the first grooves with ultraviolet rays under vacuum to form hydrophilic groups on the wall surfaces of the first grooves to form hydrophilic channels 110, and using the remaining spaced grooves as second grooves with lipophilic groups on the wall surfaces of the second grooves to form lipophilic channels 112, wherein the vacuum degree is 0.007MPa, and the ultraviolet irradiation dose is 100kJ/cm2Hydrophilic channel 110 having a width of 3mm and being oleophilic when irradiated at room temperatureThe width of the channel 112 is 3 mm;
step S10 c: a straight channel 140 having one end connected to the inlet end of the micro mixing channel 120 is cut on the substrate 123, and a first channel 142 for passing a hydrophilic solution and a second channel 144 for passing an oleophilic solution, both of which are communicated with the straight channel 140, are cut, wherein the first channel 142 is curved, and the first channel 142 is raised in a direction away from the flow direction of the liquid in the straight channel 140, the width of the first channel 142 is 3mm, the second channel 144 is curved, and the second channel 144 is raised in a direction away from the flow direction of the liquid in the straight channel 140, and the width of the second channel 144 is 3 mm;
step S10 d: the cover plate 123 is carved with the outlet channel 16, and the outlet channel 16 is communicated with the outlet end of the micro-mixing channel 120, and the width of the outlet channel 16 can be 3 mm;
step S20: three through holes are formed in the cover plate 125 to form a first inlet 122 for the hydrophilic solution to enter, a second inlet 124 for the lipophilic solution to enter, and an outlet 126 for the mixed solution to discharge, respectively;
step S30: the cover plate 125 and the base plate 123 are fitted to each other such that the cover plate 125 covers the micro-mixing channel 120, and such that the first inlet 122 communicates with the first channel 142, the second inlet 124 communicates with the second channel 144, and the outlet 126 communicates with the derivation channel 16.
Stable liquid for preparing hydrogen peroxide
Adding hydrogenated liquid containing anthraquinone and phosphoric acid solution into the prepared micro mixer 10 at room temperature to form stable liquid of hydrogen peroxide, wherein the flow rate of the phosphoric acid solution and the flow rate of the hydrogenated liquid are as follows: the flow rate of the hydrogenation liquid is 1: 30, and the mass concentration of the phosphoric acid solution is 85%.
Obtaining a basically uniform water-in-oil solution, and detecting that the demulsification voltage is 365V.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.