阅读说明：本技术 一种有效利用噻嗪酮中间体1-异丙基-3-叔丁基硫脲母液提高收率的方法及装置 (Method and device for effectively utilizing buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield ) 是由 姚修宇 范锦龙 杨玉坤 李卫 徐晓东 陈建国 姜育田 朱学军 唐素荣 万金方 于 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种有效利用噻嗪酮中间体1-异丙基-3-叔丁基硫脲母液提高收率的方法及装置,包括如下步骤：将1-异丙基-3-叔丁基硫脲母液加入到加热箱中,将所述加热箱中升温致一定温度；在用所述加料仓中的盐酸通过所述投料管投入到所述加热箱中,调节PH值,保温搅拌一段时间；再将得到的溶液放置在所述保温箱中沉淀一段时间,静置降温结晶获得沉降物与上清液,再将沉降物搅拌半小时；再将所述滤布袋放置在所述过滤箱中进行离心,获得湿品,再将湿品烘干后便得1-异丙基-3-叔丁基硫脲干品,以此能够实现降低原材料消耗,提高产品的质量和产率。(The invention discloses a method and a device for effectively utilizing buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield, which comprises the following steps: adding the 1-isopropyl-3-tert-butylthiourea mother liquor into a heating box, and heating the heating box to a certain temperature; putting hydrochloric acid in the feeding bin into the heating box through the feeding pipe, adjusting the pH value, and stirring for a period of time while keeping the temperature; then placing the obtained solution in an incubator for precipitation for a period of time, standing, cooling and crystallizing to obtain a sediment and a supernatant, and stirring the sediment for half an hour; and then placing the filter cloth bag in the filter box for centrifugation to obtain a wet product, and drying the wet product to obtain a dry product of the 1-isopropyl-3-tert-butylthiourea, so that the consumption of raw materials can be reduced, and the quality and the yield of the product can be improved.)

1. A method for effectively utilizing a buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield is characterized by comprising the following steps:

heating 1-isopropyl-3-tert-butylthiourea mother liquor to a first preset temperature value;

adding hydrochloric acid into 1-isopropyl-3-tert-butylthiourea mother liquor heated to a first preset temperature value, adjusting the pH value, and after the pH value is adjusted, keeping the temperature and stirring to obtain a first solution;

precipitating the first solution, standing for a certain time, cooling and crystallizing to obtain a sediment and a supernatant, and then stirring the sediment;

and after the sediment is stirred, filtering and centrifuging the sediment to obtain a wet product, and drying the wet product to obtain a dry product of the 1-isopropyl-3-tert-butylthiourea.

2. The method for increasing yield by effectively using the mother liquor of 1-isopropyl-3-tert-butylthiourea, which is a buprofezin intermediate, according to claim 1, wherein the first preset temperature value is 50 ℃ to 80 ℃ in the step of heating the mother liquor of 1-isopropyl-3-tert-butylthiourea to the first preset temperature value.

3. The method for increasing the yield by effectively utilizing the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor as claimed in claim 2, wherein in the step of adding hydrochloric acid into the 1-isopropyl-3-tert-butylthiourea mother liquor heated to the first preset temperature value, adjusting the PH value, and after the PH value is adjusted, keeping warm and stirring to obtain the first solution, the PH value is adjusted to be 7.5-9.5.

4. The method for effectively utilizing the mother liquor of the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea to improve the yield as claimed in claim 3, wherein in the step of precipitating the first solution, standing for a certain time, cooling for crystallization to obtain a sediment and a supernatant, and then stirring the sediment, the standing for the certain time is 1-4 h.

5. The method for effectively utilizing the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve the yield as claimed in claim 4, wherein after the sediment is stirred, the sediment is filtered and centrifuged to obtain a wet product, and the wet product is dried to obtain a dry 1-isopropyl-3-tert-butylthiourea product, wherein a 300-mesh filter cloth bag is used for filtering the sediment.

6. The device for effectively utilizing the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve the yield according to claim 5, comprising a heating box, a feeding bin, a feeding pipe, a first stirring component, a second stirring component and a filtering component, wherein a feeding port is arranged above the heating box, the feeding bin is arranged above the heating box, one end of the feeding pipe is fixedly connected with the feeding bin, the other end of the feeding pipe is fixedly connected with the heating box, the first stirring component is arranged inside the heating box, the second stirring component is arranged at the side of the heating box, the filtering component is arranged at the side of the second stirring component, the first stirring component comprises a first motor, a first rotating shaft and a stirring rod, the first motor is arranged above the heating box, the one end of first pivot with the output fixed connection of first motor, the other end of first pivot runs through the heating cabinet, and with puddler fixed connection, the quantity of puddler is many, every the puddler set up respectively in the both sides limit of pivot.

7. The apparatus for increasing the yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor as claimed in claim 6,

the second stirring subassembly includes insulation can, second motor, second pivot, stirring piece, drinking-water pipe and water pump, the insulation can set up in the side of heating cabinet, the top of insulation can is provided with the opening, the second motor set up in the top of insulation can, the one end of second pivot with the output fixed connection of second motor, the other end of second pivot runs through the insulation can, and with stirring piece fixed connection, the drinking-water pipe set up in the side of insulation can, the water pump set up in the top of drinking-water pipe.

8. The apparatus for increasing the yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor as claimed in claim 6,

the standing component comprises a filter box, a filter cloth bag and a drying piece, the filter box is arranged on the side edge of the heat insulation box, the filter cloth bag is arranged on the upper side of the filter box, and the drying piece is arranged on the inner side wall of the filter box.

Technical Field

The invention relates to the technical field of preparation of buprofezin intermediates, in particular to a method and a device for effectively utilizing a buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield.

Background

The buprofezin is a novel insect growth regulator with high efficiency, long lasting period, strong selectivity and safety. The insecticidal composition is mainly used for controlling pests such as leafhoppers, plant hoppers, whiteflies, scale insects and the like of crops such as rice, vegetables, tea, oranges and the like. Is the current breed of the same family for preventing and controlling rice planthopper.

Currently, the synthesis of buprofezin is to react ammonium thiocyanate serving as a raw material with tert-butyl alcohol in the presence of hydrochloric acid to obtain a mixture of tert-butyl thiocyanate and tert-butyl isocyanate (called mixed ester for short), perform transposition to obtain tert-butyl isothiocyanate (called isopropyl ester for short), then react with isopropylamine, and filter to obtain 1-isopropyl-3-tert-butylthiourea (called thiourea for short). In addition, N-methyl amine reacts with phosgene to obtain N-methyl-N-phenyl amino formyl chloride, and then reacts with chlorine to obtain N-chloromethyl-N-phenyl amino formyl chloride (chloride for short). And finally reacting the chloride with 1-isopropyl-3-tert-butylthiourea in the presence of an alkali reagent to obtain the buprofezin.

In the prior art, after 1-isopropyl-3-tert-butylthiourea is obtained by filtration, a large amount of mother liquor wastewater is generated, the wastewater contains more organic matters, and the treatment cost is higher. The intermediate 1-isopropyl-3-tert-butylthiourea is obtained by adjusting the pH value of the wastewater, standing, cooling, crystallizing, stirring and filtering.

Disclosure of Invention

The invention aims to provide a method and a device for effectively utilizing a buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield, and aims to solve the technical problems that the process in the prior art can improve raw material consumption, reduce product quality and yield, reduce biodegradability of mother liquor wastewater, and cannot effectively degrade organic matters in subsequent processes.

In order to achieve the purpose, the method for effectively utilizing the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve the yield comprises the following steps:

heating 1-isopropyl-3-tert-butylthiourea mother liquor to a first preset temperature value;

adding hydrochloric acid into 1-isopropyl-3-tert-butylthiourea mother liquor heated to a first preset temperature value, adjusting the pH value, and after the pH value is adjusted, keeping the temperature and stirring to obtain a first solution;

precipitating the first solution, standing for a certain time, cooling and crystallizing to obtain a sediment and a supernatant, and then stirring the sediment;

and after the sediment is stirred, filtering and centrifuging the sediment to obtain a wet product, and drying the wet product to obtain a dry product of the 1-isopropyl-3-tert-butylthiourea.

Wherein in the step of heating the 1-isopropyl-3-tert-butylthiourea mother liquor to a first preset temperature value, the first preset temperature value is 50-80 ℃.

Adding hydrochloric acid into 1-isopropyl-3-tert-butylthiourea mother liquor heated to a first preset temperature value, adjusting the pH value, and after the pH value is adjusted, keeping the temperature and stirring to obtain a first solution, wherein the pH value is adjusted to be 7.5-9.5.

And then stirring the sediment, wherein the first solution is precipitated, is kept stand for a specific time, is cooled and crystallized to obtain a sediment and a supernatant, and the specific time of standing is 1-4 hours.

After the sediment is stirred, filtering and centrifuging the sediment to obtain a wet product, and drying the wet product to obtain the dry 1-isopropyl-3-tert-butylthiourea product, wherein a 300-mesh filter cloth bag is required for filtering the sediment.

The invention also provides a device for effectively utilizing the method for improving the yield of the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, which comprises a heating box, a feeding bin, a feeding pipe, a first stirring component, a second stirring component and a filtering component, wherein a feeding port is arranged above the heating box, the feeding bin is arranged above the heating box, one end of the feeding pipe is fixedly connected with the feeding bin, the other end of the feeding pipe is fixedly connected with the heating box, the first stirring component is arranged in the heating box, the second stirring component is arranged on the side edge of the heating box, the filtering component is arranged on the side edge of the second stirring component, the first stirring component comprises a first motor, a first rotating shaft and a stirring rod, the first motor is arranged above the heating box, the one end of first pivot with the output fixed connection of first motor, the other end of first pivot runs through the heating cabinet, and with puddler fixed connection, the quantity of puddler is many, every the puddler set up respectively in the both sides limit of pivot.

The second stirring assembly comprises a heat preservation box, a second motor, a second rotating shaft, a stirring block, a water pumping pipe and a water pump, the heat preservation box is arranged on the side edge of the heating box, an opening is formed in the upper portion of the heat preservation box, the second motor is arranged on the upper portion of the heat preservation box, one end of the second rotating shaft is fixedly connected with the output end of the second motor, the other end of the second rotating shaft penetrates through the heat preservation box and is fixedly connected with the stirring block, the water pumping pipe is arranged on the side edge of the heat preservation box, and the water pump is arranged above the water pumping pipe.

The standing assembly comprises a filter box, a filter cloth bag and a drying piece, the filter box is arranged on the side edge of the heat insulation box, the filter cloth bag is arranged on the upper side of the filter box, and the drying piece is arranged on the inner side wall of the filter box.

The invention has the beneficial effects that: on the basis of the prior art, the device is improved, the intermediate 1-isopropyl-3-tert-butylthiourea is obtained by adjusting the pH value of the wastewater, standing, cooling, crystallizing, stirring and filtering.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of the steps of example 1 of the present invention.

Fig. 2 is a flowchart of the steps of embodiment 2 of the present invention.

Fig. 3 is a flowchart of the steps of embodiment 3 of the present invention.

FIG. 4 is a flowchart of the steps of embodiment 4 of the present invention.

FIG. 5 is a flowchart of the steps of embodiment 5 of the present invention.

FIG. 6 is a schematic structural diagram of an apparatus for effectively utilizing buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to increase yield according to the present invention.

FIG. 7 is a side view of an apparatus for efficiently utilizing the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to increase the yield according to the present invention.

Fig. 8 is a cross-sectional view of the a-a line structure of fig. 7 in accordance with the present invention.

1-heating box, 2-feeding bin, 3-feeding pipe, 4-first stirring component, 41-first motor, 42-first rotating shaft, 43-stirring rod, 5-second stirring component, 51-heat preservation box, 52-second motor, 53-second rotating shaft, 54-stirring block, 55-water pumping pipe, 56-water pump, 6-filtering component, 61-filtering box, 62-filtering cloth bag, 63-drying component, 9-feeding port and 10-temperature controller.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1, referring to fig. 1, the present invention also provides a method for increasing yield by effectively using a buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, which comprises the following steps:

s1: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, and heating to 80 ℃;

s2: adding hydrochloric acid into a reaction bottle, stirring, adjusting the pH value to 7, and then stirring for 1h at the temperature of 80 ℃;

s3: after stirring for 1h under heat preservation, standing and cooling to 10 ℃ for crystallization to obtain sediment and supernatant, and stirring for half an hour;

s4: after the sediment is stirred, centrifuging the sediment by using the 300-mesh filter cloth bag to obtain a wet product; the wet product was dried at 110 ℃ for 2 hours to give a dry intermediate, 24.3g, of 1-isopropyl-3-tert-butylthiourea.

In the present embodiment, in step S1, the specific steps are: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, heating the reaction bottle to 80 ℃, and in the step S2: then, hydrochloric acid was introduced into the heated mother solution of 1-isopropyl-3-tert-butylthiourea, the PH was adjusted by stirring to 7, and then, stirring was performed at 80 ℃ for 1 hour, in step S3: after the solution is stirred for 1 hour under the condition of heat preservation, the solution is kept stand and cooled to 10 ℃ for crystallization, and sediment and supernatant are obtained in the step S4: and stirring the sediment for half an hour, after the stirring of the sediment is finished, centrifuging the sediment by using a 300-mesh filter cloth bag to obtain a wet product, and drying the obtained wet product at the temperature of 110 ℃ for 2 hours to obtain an intermediate 1-isopropyl-3-tert-butylthiourea dry product with the weight of 24.3 g.

Example 2, referring to fig. 2, the present invention further provides a method for increasing yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, comprising the following steps:

s1: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, and heating to 50 ℃;

s2: adding hydrochloric acid into a reaction bottle, stirring, adjusting the pH value to 7.5, and then stirring for 2 hours at 80 ℃;

s3: after the heat preservation and stirring are finished for 2 hours, standing and cooling to 10 ℃ for crystallization to obtain sediment and supernatant, and stirring for half an hour;

s4: after the sediment is stirred, centrifuging the sediment by using the 300-mesh filter cloth bag to obtain a wet product; the wet product was dried at 110 ℃ for 2 hours to give 23.6g of a dry intermediate, 1-isopropyl-3-tert-butylthiourea.

In the present embodiment, in step S1, the specific steps are: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, heating the reaction bottle to 50 ℃, and in the step S2: then, hydrochloric acid is introduced into the heated 1-isopropyl-3-tert-butylthiourea mother liquor, the pH value is adjusted by stirring, the pH value is adjusted to 7.5, and then, the mixture is stirred for 2 hours under the condition of 80 ℃, in step S3: after the solution is kept and stirred for 2 hours, the solution is kept stand and cooled to 10 ℃ for crystallization, so that sediment and supernatant are obtained, and in the step S4: and stirring the sediment for half an hour, after the stirring of the sediment is finished, centrifuging the sediment by using a 300-mesh filter cloth bag to obtain a wet product, and drying the obtained wet product at the temperature of 110 ℃ for 2 hours to obtain the intermediate 1-isopropyl-3-tert-butylthiourea dry product with the weight of 23.6 g.

Example 3, referring to fig. 3, the present invention further provides a method for increasing yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, comprising the following steps:

s1: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, and heating to 80 ℃;

s2: adding hydrochloric acid into a reaction bottle, stirring, adjusting the pH value to 9, and then stirring for 1h at the temperature of 80 ℃;

s3: after stirring for 1h under heat preservation, standing and cooling to 10 ℃ for crystallization to obtain sediment and supernatant, and stirring for half an hour;

s4: after the sediment is stirred, centrifuging the sediment by using the 300-mesh filter cloth bag to obtain a wet product; the wet product was dried at 110 ℃ for 2 hours to give 21.7g of a dry intermediate, 1-isopropyl-3-tert-butylthiourea.

In the present embodiment, in step S1, the specific steps are: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, heating the reaction bottle to 80 ℃, and in the step S2: then, hydrochloric acid is introduced into the heated 1-isopropyl-3-tert-butylthiourea mother liquor, the pH value is adjusted by stirring, the pH value is adjusted to 9, and then, the mixture is stirred for 1 hour under the condition of 80 ℃, in step S3: after the solution is stirred for 1 hour under the condition of heat preservation, the solution is kept stand and cooled to 10 ℃ for crystallization, sediment and supernatant are obtained, the solution is stirred for half an hour, and in the step S4: and stirring the sediment for half an hour, after the stirring of the sediment is finished, centrifuging the sediment by using a 300-mesh filter cloth bag to obtain a wet product, and drying the obtained wet product at the temperature of 110 ℃ for 2 hours to obtain the intermediate 1-isopropyl-3-tert-butylthiourea dry product with the weight of 21.7 g.

Example 4, referring to fig. 4, the present invention further provides a method for increasing yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, comprising the following steps:

s1: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, and heating to 50 ℃;

s2: adding hydrochloric acid into a reaction bottle, stirring, adjusting the pH value to 8, and then stirring for 4 hours at 50 ℃;

s3: after stirring for 4h under heat preservation, standing and cooling to 10 ℃ for crystallization to obtain sediment and supernatant, and stirring for half an hour;

s4: after the sediment is stirred, centrifuging the sediment by using the 300-mesh filter cloth bag to obtain a wet product; the wet product was dried at 110 ℃ for 2 hours to give a dry intermediate, 25.4g, of 1-isopropyl-3-tert-butylthiourea.

In the present embodiment, in step S1, the specific steps are: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, heating the reaction bottle to 50 ℃, and in the step S2: then, hydrochloric acid is introduced into the heated 1-isopropyl-3-tert-butylthiourea mother liquor, the pH value is adjusted by stirring, the pH value is adjusted to 8, and then, the mixture is stirred for 4 hours under the condition of 50 ℃, in step S3: after the solution is kept and stirred for 4 hours, the solution is kept stand and cooled to 10 ℃ for crystallization, so that sediment and supernatant are obtained, and in the step S4: and stirring the sediment for half an hour, after the stirring of the sediment is finished, centrifuging the sediment by using a 300-mesh filter cloth bag to obtain a wet product, and drying the obtained wet product at the temperature of 110 ℃ for 2 hours to obtain an intermediate 1-isopropyl-3-tert-butylthiourea dry product with the weight of 24.3 g.

Example 5, referring to fig. 5, the present invention further provides a method for increasing yield by effectively using the buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor, comprising the following steps:

s1: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, and heating to 50 ℃;

s2: adding hydrochloric acid into a reaction bottle, stirring, adjusting the pH value to 7.5, and then stirring for 4 hours at 50 ℃;

s3: after stirring for 4h under heat preservation, standing and cooling to 10 ℃ for crystallization to obtain sediment and supernatant, and stirring for half an hour;

s4: after the sediment is stirred, centrifuging the sediment by using the 300-mesh filter cloth bag to obtain a wet product; the wet product was dried at 110 ℃ for 2 hours to give a dry intermediate, 25.3g, of 1-isopropyl-3-tert-butylthiourea.

In the present embodiment, in step S1, the specific steps are: adding 1000g of 1-isopropyl-3-tert-butylthiourea mother liquor into a reaction bottle, heating the reaction bottle to 50 ℃, and in the step S2: then, hydrochloric acid was introduced into the heated mother solution of 1-isopropyl-3-tert-butylthiourea, the PH was adjusted by stirring to 7.5, and then stirring was performed at 50 ℃ for 1 hour while maintaining the temperature, in step S3: after the solution is stirred for 1 hour under the condition of heat preservation, the solution is kept stand and cooled to 10 ℃ for crystallization, and sediment and supernatant are obtained in the step S4: and stirring the sediment for half an hour, after the stirring of the sediment is finished, centrifuging the sediment by using a 300-mesh filter cloth bag to obtain a wet product, and drying the obtained wet product at the temperature of 110 ℃ for 2 hours to obtain an intermediate 1-isopropyl-3-tert-butylthiourea dry product with the weight of 25.3 g.

The content and the product yield of the specific example 4 are both high, and can be used as the preferable feeding proportion.

Referring to fig. 1 to 8, the present invention provides an apparatus for effectively utilizing buprofezin intermediate 1-isopropyl-3-tert-butylthiourea mother liquor to improve yield, including a heating box 1, a feeding bin 2, a feeding pipe 3, a first stirring assembly 4, a second stirring assembly 5 and a filtering assembly 6, wherein a feeding port 9 is disposed above the heating box 1, the feeding bin 2 is disposed above the heating box 1, one end of the feeding pipe 3 is fixedly connected to the feeding bin 2, the other end of the feeding pipe 3 is fixedly connected to the heating box 1, the first stirring assembly 4 is disposed inside the heating box 1, the second stirring assembly 5 is disposed at a side of the heating box 1, the filtering assembly 6 is disposed at a side of the second stirring assembly 5, the first stirring assembly 4 includes a first motor 41, a second motor 41, a third stirring assembly 6, a third stirring assembly 4, a fourth stirring assembly 5, a fourth stirring assembly 4, a fourth stirring assembly, First pivot 42 and puddler 43, first motor 41 set up in the top of heating cabinet 1, the one end of first pivot 42 with the output fixed connection of first motor 41, the other end of first pivot 42 runs through heating cabinet 1, and with puddler 43 fixed connection, the quantity of puddler 43 is many, every puddler 43 set up respectively in the both sides limit of pivot.

In this embodiment, 1-isopropyl-3-tert-butylthiourea mother liquor is added into the heating box 1 from the feed port 9 of the heating box 1 and heated in the heating box 1, hydrochloric acid in the feed bin 2 is fed into the heating box 1 from the feed pipe 3, and the hydrochloric acid reacts with the 1-isopropyl-3-tert-butylthiourea mother liquor, the first motor 41 is disposed above the heating box 1, the first motor 41 is started, the output end of the first motor 41 drives the rotating shaft, the rotating shaft drives the stirring rod 43 fixedly connected with the rotating shaft, and the materials are fully mixed in the heating box 1.

Further, the second stirring assembly 5 includes an insulation box 51, a second motor 52, a second rotating shaft 53, a stirring block 54, a water pumping pipe 55 and a water pump 56, the insulation box 51 is disposed at the side of the heating box 1, an opening is disposed above the insulation box 51, the second motor 52 is disposed above the insulation box 51, one end of the second rotating shaft 53 is fixedly connected to the output end of the second motor 52, the other end of the second rotating shaft 53 penetrates through the insulation box 51 and is fixedly connected to the stirring block 54, the water pumping pipe 55 is disposed at the side of the insulation box 51, and the water pump 56 is disposed above the water pumping pipe 55.

In this embodiment, the mixed material is poured into the thermal insulation box 51 on the side of the heating box 1, the mixed solution is allowed to stand in the thermal insulation box 51 for a period of time, the water pump 56 is started, the clear water separated by standing is pumped out through the water pumping pipe 55, the precipitate is left, when the second motor 52 is started, the output end of the second motor 52 drives the second rotating shaft 53, and the second rotating shaft 53 drives the stirring block 54 fixedly connected with the second rotating shaft 53 to rotate, so as to stir the precipitate in the thermal insulation box 51.

Further, the standing assembly comprises a filter box 61, a filter cloth bag 62 and a drying piece 63, the filter box 61 is arranged on the side edge of the heat preservation box 51, the filter cloth bag 62 is arranged on the upper side of the filter box 61, and the drying piece 63 is arranged on the inner side wall of the filter box 61.

In this embodiment, the stirred precipitate is put into the filtering box 61, the filtering cloth bag 62 centrifugally filters the stirred precipitate, the drying member 63 is disposed on the inner side wall of the filtering box 61, and the wet product filtered by the filtering cloth bag 62 is dried, so as to obtain the dry 1-isopropyl-3-tert-butylthiourea product.

Further, the temperature controller 10 is fixedly connected to the heating box 1 and is located at a side of the heating box 1.

In this embodiment, the temperature controller 10 is disposed at a side of the heating box 1, so that an operator can effectively control the temperature in the heating box 1 through the temperature controller 10, thereby facilitating the use of the device and improving the product quality.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.