阅读说明：本技术 一种实验用氢氧化钠生产方法 (Production method of sodium hydroxide for experiment ) 是由 程正宇 李涵 于 2020-07-21 设计创作，主要内容包括：本发明涉及氢氧化钠生产领域,具体的说是一种实验用氢氧化钠生产方法,该方法中使用的生产装置包括反应槽、装置盒、料斗、添加结构、第二齿轮、第一转轴、添加孔、第二转轴、压辊、排出孔、刮板、调节结构和槽盖。本发明通过第二齿轮的转动,使得第二齿轮上开设的添加孔可以周期性的与料斗进行连通,从而使料斗内的氯化钠固体进入装置盒,使得氯化钠的添加具有更高的准确性,压辊在装置盒的内侧壁上进行滚动,从而将添加的氯化钠固体进行碾碎,使得氯化钠固体在进入水溶液中后溶解速度更快,保证制取的效率,被碾碎的氯化钠固体会被压辊后方的刮板刮动,并通过装置盒内设置的排出孔落入反应槽内进行溶解,以补充因电解而消耗的氯化钠。(The invention relates to the field of sodium hydroxide production, in particular to a method for producing sodium hydroxide for experiments. According to the invention, through the rotation of the second gear, the adding holes formed in the second gear can be periodically communicated with the hopper, so that sodium chloride solids in the hopper enter the device box, the sodium chloride is added with higher accuracy, the pressing roller rolls on the inner side wall of the device box, and the added sodium chloride solids are crushed, so that the dissolving speed of the sodium chloride solids after entering the aqueous solution is higher, the preparation efficiency is ensured, and the crushed sodium chloride solids can be scraped by the scraping plate behind the pressing roller and fall into the reaction tank through the discharge hole formed in the device box to be dissolved, so that the sodium chloride consumed by electrolysis is supplemented.)

1. A production method of sodium hydroxide for experiments is characterized by comprising the following steps:

s1: sufficient water is placed in a reaction tank (1) of a production device, so that the liquid level can be higher than a partition plate (53) arranged at the bottom side of a tank cover (6), two carbon rods for electrolysis sequentially penetrate through sealing rings (56) at two sides of the tank cover (6), the immersion length of the carbon rods can be adjusted by rotating a screw rod (51) at one side, meanwhile, under the action of a spring (57), a rubber gasket (54) at the side of a third gear (52) is tightly abutted against the side of the carbon rods, the positions of carbon rod electrodes are further fixed, a gas guide pipe for gas collection is connected with a collection device through a gas exhaust hole, and finally, a certain amount of sodium chloride solid is added into a hopper (3);

s2: rotating the rocker (41) to enable the second gear (43) to start rotating, wherein the second gear (43) is provided with an adding hole (45), the adding hole (45) can be periodically communicated with a discharge hole of the hopper (3), so that the sodium chloride solid in the hopper (3) slowly flows into the device box (2), for the sodium chloride solid flowing into the device box (2), a press roller (47) arranged on the side surface of the second rotating shaft (46) rolls and simultaneously crushes the sodium chloride solid flowing into the device box (2), and is scraped by a scraper (49a) on one side of the press roller (47), and the sodium chloride solid finally flows into the reaction tank (1) through the discharge hole (48) along with the rotation of the second rotating shaft (46);

s3: the length of the carbon rod immersed in the solution is changed by rotating the screw rod (51), so that the reaction rate is changed, when solute sodium chloride is continuously consumed, the solute sodium chloride can be continuously added by rotating the rocker (41), the continuous reaction is ensured, and the preparation efficiency of sodium hydroxide is improved;

wherein, the production device in S1 includes reaction tank (1), one side of reaction tank (1) is equipped with capping (6), fixedly connected with device box (2) is gone up in capping (6), one side of device box (2) is equipped with hopper (3), be equipped with in device box (2) and add structure (4), it includes second gear (43), first pivot (44), adds hole (45), second pivot (46), compression roller (47), discharge hole (48) and scraper blade (49a) to add structure (4), first pivot (44) with device box (2) rotate and be connected, fixedly connected with on first pivot (44) second gear (43), add hole (45) have been seted up to second gear (43) one side, first pivot (44) side fixedly connected with second pivot (46), the other end of second pivot (46) with device box (2) inboard sliding connection, rotate on second pivot (46) and be connected with compression roller (47), compression roller (47) with the inboard roll connection of device box (2), the one end of scraper blade (49a) with second pivot (46) perpendicular fixed connection, one side of scraper blade (49a) with the inboard sliding connection of device box (2), device box (2) with one side that second gear (43) leave has been seted up discharge hole (48), the both sides of capping (6) are equipped with regulation structure (5).

2. The method for producing sodium hydroxide for experiments according to claim 1, wherein: the adding structure (4) further comprises a rocker (41) and a first gear (42), the rocker (41) is rotatably connected with the device box (2), one end of the rocker (41) is fixedly connected with the first gear (42), and the first gear (42) is meshed with the second gear (43).

3. The method for producing sodium hydroxide for experiments according to claim 1, wherein: the adding structure (4) further comprises a stirrer (49), and one end, far away from the second gear (43), of the first rotating shaft (44) is fixedly connected with the stirrer (49).

4. The method for producing sodium hydroxide for experiments according to claim 1, wherein: the adjusting structure (5) comprises two partition plates (53), the two partition plates (53) are respectively and fixedly connected to the bottom side of the groove cover (6) in a vertical mode, and the groove cover (6) is provided with exhaust holes (7) between the two partition plates (53) and the side wall of the groove cover (6).

5. The method for producing sodium hydroxide for experiments according to claim 1, wherein: the adjusting structure (5) further comprises a third gear (52), a rubber gasket (54) and a third rotating shaft (55), the third rotating shaft (55) is connected with the groove cover (6) in a sliding mode, the third rotating shaft (55) is fixedly connected with the third gear (52), and the side face of the third gear (52) is fixedly connected with the rubber gasket (54).

6. The method for producing sodium hydroxide for experiments according to claim 5, wherein: the adjusting structure (5) further comprises a screw rod (51) and springs (57), the screw rod (51) is in threaded connection with the side face of the third gear (52), the screw rod (51) is in sliding connection with the slot cover (6), the springs (57) are fixedly connected to two ends of the screw rod (51), and the other ends of the two springs (57) are fixedly connected to the slot cover (6); the adjusting structure (5) further comprises a sealing ring (56), the sealing ring (56) is of an elastic structure, the thickness of the middle of the sealing ring (56) is smaller than that of the edge, and the outer side of the sealing ring (56) is fixedly connected with the groove cover (6).

Technical Field

The invention relates to the field of sodium hydroxide production, in particular to a method for producing sodium hydroxide for experiments.

Background

Sodium hydroxide, whose chemical formula is NaOH, commonly known as caustic soda, is a strong caustic alkali with strong corrosivity, generally in the form of sheet or block, is easily soluble in water (exothermic when dissolved in water) and forms an alkaline solution, has deliquescence, is easy to absorb water vapor (deliquescence) and carbon dioxide (deterioration) in air, and can be checked for deterioration by adding hydrochloric acid. NaOH is a necessary chemical in a chemical laboratory and is also one of common chemicals. The pure product is colorless and transparent crystals.

However, when sodium hydroxide is prepared by electrolyzing sodium chloride, the sodium chloride in the solution is gradually consumed as the electrolysis proceeds, and the concentration of the sodium chloride solution needs to be ensured to maintain the preparation efficiency of the sodium hydroxide, and the preparation efficiency is also reduced if the sodium chloride solid is slowly dissolved in water when the sodium chloride is added.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method for producing sodium hydroxide for experiments.

The technical scheme adopted by the invention for solving the technical problems is as follows: a production method of sodium hydroxide for experiments comprises the following steps:

s1: placing sufficient water in a reaction tank of a production device to ensure that the liquid level can not pass through a partition plate arranged at the bottom side of a tank cover, sequentially penetrating two carbon rods for electrolysis through sealing rings at two sides of the tank cover, rotating a screw rod at one side to adjust the immersion length of the carbon rods, tightly abutting a rubber gasket at the side surface of a third gear against the side surface of the carbon rods under the action of a spring, further fixing the positions of electrodes of the carbon rods, connecting a gas guide pipe for gas collection with a collecting device through an exhaust hole, and finally adding a certain amount of sodium chloride solid in a hopper;

s2: the rocker is rotated to enable the second gear to start rotating, and the adding holes are formed in the second gear and can be periodically communicated with a discharge hole of the hopper, so that sodium chloride solid in the hopper slowly flows into the device box, and for the sodium chloride solid flowing into the device box, a pressing roller arranged on the side surface of the second rotating shaft can crush the sodium chloride solid flowing into the device box while rolling and is scraped by a scraper on one side of the pressing roller, and the sodium chloride solid finally flows into the reaction tank through the discharge hole along with the rotation of the second rotating shaft;

s3: the length of the carbon rod immersed in the solution is changed by rotating the screw rod, so that the reaction rate is changed, when solute sodium chloride is continuously consumed, the solute sodium chloride can be continuously added by rotating the rocker, the continuous reaction is ensured, and the preparation efficiency of sodium hydroxide is improved;

wherein, the apparatus for producing in S1 includes the reaction tank, one side of reaction tank is equipped with the capping, fixedly connected with device box is covered to the capping, one side of device box is equipped with the hopper, be equipped with in the device box and add the structure, it includes second gear, first pivot, interpolation hole, second pivot, compression roller, discharge hole and scraper blade to add the structure, first pivot with device box rotates to be connected, fixedly connected with in the first pivot the second gear, add the hole has been seted up to second gear one side, first pivot side fixedly connected with the second pivot, the other end of second pivot with device box inside side sliding connection, rotate in the second pivot and be connected with the compression roller, the compression roller with device box' S inboard rolling connection, the one end of scraper blade with the perpendicular fixed connection of second pivot, one side of the scraper is connected with the inner side of the device box in a sliding mode, the discharge hole is formed in the side, away from the second gear, of the device box, and adjusting structures are arranged on the two sides of the groove cover.

Preferably, in order to drive the second gear and enable the second gear to perform normal functions, the sodium chloride solid is added, the adding structure further comprises a rocker and a first gear, the rocker is rotatably connected with the device box, one end of the rocker is fixedly connected with the first gear, and the first gear is meshed with the second gear.

Preferably, in order to further accelerate the dissolving speed of the sodium chloride solid after entering the aqueous solution and guarantee the uniformity of the solute in the solution, the preparation efficiency is improved, the adding structure further comprises a stirrer, and the first rotating shaft is far away from one end of the second gear, which is fixedly connected with the stirrer.

Preferably, in order to prevent the hydrogen and the chlorine generated by the electrodes at the two ends from mixing to cause danger, the adjusting structure comprises two partition plates, the two partition plates are respectively and fixedly connected to the bottom side of the slot cover in a vertical manner, and an exhaust hole is formed in the slot cover between the two partition plates and the side wall of the slot cover.

Preferably, in order to adjust the length of the carbon rod used as the electrode immersed in the solution conveniently, so as to adjust the reaction speed, the adjusting structure further comprises a third gear, a rubber gasket and a third rotating shaft, the third rotating shaft is slidably connected with the tank cover, the third gear is fixedly connected to the third rotating shaft, and the rubber gasket is fixedly connected to the side surface of the third gear.

Preferably, in order to press from both sides tight fixedly to the one end of carbon-point, it still includes screw rod and spring to adjust the structure, the screw rod with the side threaded connection of third gear, the screw rod with capping sliding connection, the both ends fixedly connected with of screw rod the spring, two the other end fixed connection of spring in the capping for the gas emergence in the avoidance of the reaction tank escapes, conveniently collects gas, it still includes the sealing washer to adjust the structure, the sealing washer is elastic construction, just the middle part thickness of sealing washer is less than marginal thickness, the outside of sealing washer with capping fixed connection.

The invention has the beneficial effects that:

(1) the invention provides a method for producing sodium hydroxide for experiments, which is characterized in that an adding hole formed in a second gear can be periodically communicated with a hopper through the rotation of the second gear, so that sodium chloride solid in the hopper enters a device box, the addition of sodium chloride is higher in accuracy, on the other hand, a compression roller arranged on the side surface can roll on the inner side wall of the device box through the rotation of a second rotating shaft, the added sodium chloride solid is crushed, the dissolving speed of the sodium chloride solid after the sodium chloride solid enters an aqueous solution is higher, the preparation efficiency is ensured, the crushed sodium chloride solid is finally scraped by a scraper plate behind the compression roller and falls into a reaction tank through a discharge hole formed in the device box to be dissolved, the sodium chloride consumed due to electrolysis is supplemented, and the continuous and stable preparation is ensured.

(2) The invention provides a method for producing sodium hydroxide for experiments, which comprises the steps of stirring a solution by a stirrer to fully dissolve sodium chloride solids, connecting two fixed graphite electrodes with an external power supply to start electrolysis, enabling generated hydrogen and chlorine not to be mixed and to be collected by an exhaust hole, and changing the length of a carbon rod immersed in the solution by rotating a screw rod in the reaction process so as to change the reaction rate.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic view showing the overall structure of a production apparatus used in the present invention;

FIG. 3 is a schematic view showing a connection structure of the reaction tank and the addition structure shown in FIG. 2;

FIG. 4 is a schematic view of the connection structure of the cartridge and the adding structure of the apparatus shown in FIG. 2;

fig. 5 is a schematic view of a connection structure of the adjustment structure and the slot cover shown in fig. 2.

In the figure: 1. reaction tank, 2, device box, 3, hopper, 4, adding structure, 41, rocker, 42, first gear, 43, second gear, 44, first rotating shaft, 45, adding hole, 46, second rotating shaft, 47, press roller, 48, discharge hole, 49, stirrer, 49a, scraper, 5, adjusting structure, 51, screw, 52, third gear, 53, partition board, 54, rubber gasket, 55, third rotating shaft, 56, sealing ring, 57, spring, 6, tank cover, 7, exhaust hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to FIGS. 1-5, a method for producing sodium hydroxide for experiments includes the following steps:

s1: placing enough water in a reaction tank 1 of a production device to ensure that the liquid level can exceed a partition plate 53 arranged at the bottom side of a tank cover 6, sequentially penetrating two carbon rods for electrolysis through sealing rings 56 at two sides of the tank cover 6, adjusting the immersion length of the carbon rods by rotating a screw 51 at one side, tightly abutting a rubber gasket 54 at the side of a third gear 52 against the side of the carbon rods under the action of a spring 57, further fixing the positions of carbon rod electrodes, connecting a gas guide pipe for gas collection with a collecting device through an exhaust hole, and finally adding certain sodium chloride solid in a hopper 3;

s2: rotating the rocker 41 to enable the second gear 43 to start rotating, wherein the second gear 43 is provided with an adding hole 45, and the adding hole 45 can be periodically communicated with a discharge hole of the hopper 3, so that the sodium chloride solid in the hopper 3 slowly flows into the device box 2, and for the sodium chloride solid flowing into the device box 2, the pressure roller 47 arranged on the side surface of the second rotating shaft 46 can crush the sodium chloride solid flowing into the device box 2 while rolling, and is scraped by the scraper 49a on one side of the pressure roller 47, and the sodium chloride solid finally flows into the reaction tank 1 through the discharge hole 48 along with the rotation of the second rotating shaft 46;

s3: the length of the carbon rod immersed in the solution is changed by rotating the screw 51, so that the reaction rate is changed, when the solute sodium chloride is continuously consumed, the solute sodium chloride can be continuously added by rotating the rocker 41, the continuous reaction is ensured, and the preparation efficiency of the sodium hydroxide is improved;

wherein, the production device in S1 includes a reaction tank 1, one side of the reaction tank 1 is provided with a tank cover 6, the tank cover 6 is fixedly connected with a device box 2, one side of the device box 2 is provided with a hopper 3, an adding structure 4 is arranged in the device box 2, the adding structure 4 comprises a second gear 43, a first rotating shaft 44, an adding hole 45, a second rotating shaft 46, a press roller 47, a discharge hole 48 and a scraper 49a, the first rotating shaft 44 is rotatably connected with the device box 2, the first rotating shaft 44 is fixedly connected with the second gear 43, one side of the second gear 43 is provided with the adding hole 45, the side surface of the first rotating shaft 44 is fixedly connected with the second rotating shaft 46, the other end of the second rotating shaft 46 is slidably connected with the inner side of the device box 2, the second rotating shaft 46 is rotatably connected with the press roller 47, the press roller 47 is rotatably connected with the inner side of the device box 2, one end of the scraping plate 49a is vertically and fixedly connected with the second rotating shaft 46, one side of the scraping plate 49a is slidably connected with the inner side of the device box 2, the discharging hole 48 is formed in the side, away from the second gear 43, of the device box 2, and the adjusting structures 5 are arranged on the two sides of the groove cover 6.

As a technical optimization scheme of the present invention, the adding structure 4 further includes a rocker 41 and a first gear 42, the rocker 41 is rotatably connected with the device box 2, one end of the rocker 41 is fixedly connected with the first gear 42, the first gear 42 is meshed with the second gear 43, so as to facilitate driving of the second gear, enable the second gear to function normally, and add sodium chloride solid.

As a technical optimization scheme of the present invention, the adding structure 4 further includes a stirrer 49, and one end of the first rotating shaft 44, which is far away from the second gear 43, is fixedly connected to the stirrer 49, so as to further accelerate the dissolution speed of the sodium chloride solid after entering the aqueous solution, ensure the uniformity of the solute in the solution, and improve the preparation efficiency.

As a technical optimization scheme of the present invention, the adjusting structure 5 includes two partition plates 53, two partition plates 53 are provided, the two partition plates 53 are respectively and vertically and fixedly connected to the bottom side of the slot cover 6, and the slot cover 6 is provided with an exhaust hole 7 between the two partition plates 53 and the side wall of the slot cover 6, so as to prevent the hydrogen and the chlorine generated by the electrodes at the two ends from mixing to cause danger.

As a technical optimization scheme of the present invention, the adjusting structure 5 further includes a third gear 52, a rubber washer 54 and a third rotating shaft 55, the third rotating shaft 55 is slidably connected to the tank cover 6, the third gear 52 is fixedly connected to the third rotating shaft 55, and the rubber washer 54 is fixedly connected to a side surface of the third gear 52, so as to adjust the length of the carbon rod used as an electrode immersed in the solution for convenience, so as to adjust the reaction speed.

As a technical optimization scheme of the present invention, the adjusting structure 5 further includes a screw 51 and a spring 57, the screw 51 is in threaded connection with the side surface of the third gear 52, the screw 51 is in sliding connection with the slot cover 6, the two ends of the screw 51 are fixedly connected with the spring 57, the other ends of the two springs 57 are fixedly connected to the slot cover 6, the adjusting structure 5 further includes a sealing ring 56, the sealing ring 56 is an elastic structure, the thickness of the middle part of the sealing ring 56 is smaller than the thickness of the edge, the outer side of the sealing ring 56 is fixedly connected with the slot cover 6, so as to avoid the gas in the reaction tank 1 from escaping, and facilitate the collection of the gas.

When the invention is used, firstly, enough water is placed in the reaction tank 1, so that the liquid level can cross the partition plate 53 arranged at the bottom side of the tank cover 6, two carbon rods for electrolysis sequentially pass through the sealing rings 56 at the two sides of the tank cover 6, the carbon rods have good sealing performance after being inserted due to the elastic structure of the sealing rings 56, the screw 51 at the rotating side can adjust the immersion length of the carbon rods, meanwhile, under the action of the spring 57, the rubber gasket 54 at the side surface of the third gear 52 is tightly abutted against the side surface of the carbon rods, the positions of the carbon rod electrodes are further fixed, the gas guide pipe for gas collection is connected with the collecting device through the exhaust hole, and finally, a certain sodium chloride solid is added into the hopper 3, at the moment, a user can rotate the rocker 41 to enable the second gear 43 to start to rotate, because the adding hole 45 is arranged on the second gear 43, the adding hole 45 can be periodically communicated with the discharge hole of the hopper 3, so that the sodium chloride solid in the hopper 3 slowly flows into the device box 2, the press roller 47 arranged on the side surface of the second rotating shaft 46 can crush the sodium chloride solid flowing into the device box 2 while rolling, and is scraped by the scraper 49a on one side of the press roller 47, and finally flows into the reaction tank 1 from the discharge hole 48 along with the rotation of the second rotating shaft 46, because the sodium chloride solid is ground into powder, the sodium chloride solid is easier to dissolve, meanwhile, the bottom end of the second rotating shaft 46 is provided with the stirrer 49, and in the rotation process of the second rotating shaft 46, the solution is stirred by the stirrer 49, so that the sodium chloride solid is fully dissolved, two fixed graphite electrodes are connected with an external power supply to start electrolysis, and due to the arrangement of the partition plate 53, the generated hydrogen and chlorine cannot be mixed and can be collected by the exhaust hole 7, and in the reaction process, the length of the carbon rod immersed in the solution can be changed by rotating the screw 51 to further change the reaction rate, when solute sodium chloride is continuously consumed, the solute sodium chloride can be continuously added through rotating the rocker 41, continuous reaction is guaranteed, and the preparation efficiency of sodium hydroxide is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.