(R)-(+)-2-(4-hydroxyphenoxy) propionic acid purification equipment

Abstract

The utility model provides (R)-(+)-2-(4-hydroxyphenoxy) propionic acid purification equipment which comprises a tank body, a purification mechanism is arranged on one side of the tank body, and a cooling assembly is arranged on one side of the purification mechanism. By arranging the purification mechanism, the filtering assembly and the separation assembly, the effects of accelerating the mixing speed of raw materials and solvents, intercepting insoluble substances in a mixture and improving the subsequent crystal purity are achieved, the raw materials and the solution are injected into the tank body, the mixture can be heated by the resistance wire, the mixing speed of the mixture is accelerated, and the purity of crystals is improved. The first screen mesh can intercept insoluble substances in the mixture, and crystals generated by purification can be obtained through subsequent separation of the second screen mesh, so that the problems that in the prior art, when raw materials and solvents are dissolved and mixed, the stirring and mixing speed is low, and when the mixture is too much, the generated insoluble substances are increased, and the purity of the crystals is increased are solved. And the concentration of crystals generated after purification is influenced.

Description

Technical Field

[0001] The utility model relates to the field of pesticide intermediate production, and particularly to a purification device for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid. Background Art

[0002] (R)-(+)-2-(4-hydroxyphenoxy) propionic acid is a key chiral intermediate in the fields of pesticides, pharmaceuticals and organic synthesis. Its purity and optical activity are crucial for the quality and performance of downstream products. However, during the synthesis process, it is often accompanied by various by-products and impurities. The presence of these impurities will significantly reduce the purity and optical purity of the product, thereby affecting its application effect. During the production of (R)-(+)-2-(4-hydroxyphenoxy) propionic acid, purification equipment is often required. However, the existing purification equipment has many defects, which are specifically as follows:

[0003] (1) For the existing purification equipment, when dissolving and mixing raw materials and solvents, the stirring and mixing rate is relatively low. Moreover, when there are more mixtures, the insoluble substances generated will also increase, thereby affecting the crystal concentration produced after purification;

[0004] (2) For the existing purification equipment, the cooling of the mixture mostly adopts natural cooling, which takes a long time when analyzing crystals, thereby reducing the purification work efficiency.

[0005] Therefore, we make improvements on this and propose a purification device for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid. Summary of the Utility Model

[0006] The purpose of the utility model is to address the current situation that when dissolving and mixing raw materials and solvents, the stirring and mixing rate is relatively low. Moreover, when there are more mixtures, the insoluble substances generated will also increase, thereby affecting the crystal concentration produced after purification. And the cooling of the mixture mostly adopts natural cooling, which takes a long time when analyzing crystals, thereby reducing the purification work efficiency.

[0007] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0008] (R)-(+)-2-(4-hydroxyphenoxy) propionic acid purification equipment, including a tank body, one side of the tank body is provided with a purification mechanism, and one side of the purification mechanism is provided with a cooling component;

[0009] The purification mechanism includes a first motor, a rotating column, stirring blades, a placement groove, a resistance wire, a partition plate, an air injection pipe, a transmission pipe, a feeding port, a protective cover, a filtering component, and a separation component. The first motor is bolted to the top of the tank body. The rotating column is fixedly connected to the output end of the first motor. A plurality of the stirring blades are fixedly connected to the outer wall of the rotating column. The placement groove is opened inside the tank body. The resistance wire is arranged on one side of the placement groove. The partition plate is fixedly connected to the inner wall of the tank body. The air injection pipe is fixedly connected to the top of the tank body. The transmission pipe is fixedly connected to one side of the tank body. The feeding port is opened on the top of the tank body. The protective cover is bolted to the top of the tank body.

[0010] As a preferred technical solution of the present utility model, the filtering component includes a second motor, a rotating column, a fixed frame, a first screen, a shielding plate, and perforations. The second motor is bolted to the bottom of the tank body. The rotating column is fixedly connected to the output end of the second motor. The fixed frame is fixedly connected to the bottom of the partition plate. The first screen is fixedly connected to the outer wall of the rotating column. The shielding plate is fixedly connected to the outer wall of the rotating column. A plurality of the perforations are respectively opened inside the partition plate and the shielding plate.

[0011] As a preferred technical solution of the present utility model, the separation component includes an extraction pipe, a first water pump, an injection pipe, a cover plate, a separation tank, a separation frame, and a second screen. The extraction pipe is fixedly connected to one side of the fixed frame. The first water pump is arranged on one side of the extraction pipe. The injection pipe is arranged on the other side of the first water pump. The cover plate is fixedly connected to one side of the injection pipe. The separation tank is bolted to the bottom of the cover plate. The separation frame is slidably connected to one side of the separation tank. The second screen is arranged inside the separation frame.

[0012] As a preferred technical solution of the present utility model, the cooling component includes a flow pipe, a water storage tank, a second water pump, and a circulation pipe. The flow pipe is fixedly connected to one side of the separation tank. The water storage tank is fixedly connected to one side of the flow pipe. The second water pump is arranged on the top of the water storage tank. The circulation pipe is arranged on the top of the second water pump. The other end of the circulation pipe is fixedly connected to the separation tank.

[0013] As a preferred technical solution of the present utility model, two support rods are fixedly connected to the outer wall of the rotating column. A scraping plate is fixedly connected to one side of the support rod. One side of the scraping plate is in close fit with the inner wall of the tank body.

[0014] As a preferred technical solution of the present utility model, a blocking plate is fixedly connected to the outer wall of the rotating column. The blocking plate is in close fit with the inner bottom wall of the fixed frame.

[0015] As a preferred technical solution of the present utility model, a discharge pipe is fixedly connected to one side of the separation tank. A rotating cap is threadedly connected to the outer wall of the discharge pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By providing a purification mechanism, a filtration component and a separation component, the mixing rate of the raw material and the solvent is increased, and insoluble substances in the mixture can be intercepted, improving the purity of the subsequent crystals. Through the feeding port and the transfer pipe, the raw material and the solution can be respectively injected into the tank body, and the injection pipe can inject external inert gas into the tank body to prevent oxidation of the raw material during mixing. The resistance wire can heat the raw material and the solvent to accelerate their mixing rate. The first screen can intercept insoluble substances in the mixture, and then the crystals produced by purification can be obtained through the second screen in the separation tank, solving the problems in the prior art that when dissolving and mixing the raw material and the solvent, the stirring and mixing rate is low, and when there is more mixture, the insoluble substances generated will also increase, thus affecting the concentration of the crystals produced after purification.

[0018] 2. By providing a cooling component, the effect of accelerating crystal formation is achieved. By adding coolant to the water storage tank and starting the second water pump, the coolant can be injected into the separation tank, and the circulation pipeline can send the coolant back to the water storage tank. Through continuous circulation, the cooling speed of the compound is accelerated, solving the problem in the prior art that most of the cooling of the mixture adopts natural cooling, which takes a long time during crystal analysis, thus reducing the purification work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the purification equipment for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid provided by the present utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the purification mechanism in the purification equipment for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid provided by the present utility model;

[0021] Figure 3 It is a schematic cross-sectional structure diagram of the separation component in the purification equipment for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid provided by the present utility model;

[0022] Figure 4 It is for the purification equipment for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid provided by the present utility model Figure 3 Enlarged view of part A;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the filtration component in the purification equipment for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid provided by the present utility model.

[0024] Labels in the figure: 1, tank body; 2, purification mechanism; 5, cooling component; 201, first motor; 202, rotating column; 203, stirring blade; 204, placement groove; 205, heating wire; 206, partition plate; 207, injection pipe; 208, transfer pipe; 209, feeding port; 210, protective cover; 3, filtering component; 4, separation component; 301, second motor; 302, rotating column; 303, fixed frame; 304, first sieve; 305, baffle; 306, perforation; 401, extraction pipe; 402, first water pump; 403, injection pipe; 404, cover plate; 405, separation tank; 406, separation frame; 407, second sieve; 501, flow pipe; 502, water storage tank; 503, second water pump; 504, circulation pipe; 6, support rod; 7, scraping plate; 8, blocking plate; 9, discharge pipe; 10, rotating cap. Detailed implementation mode

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0026] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the present utility model claimed, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] As Figures 1-5 shown, this embodiment provides a purification device for (R)-(+)-2-(4-hydroxyphenoxy) propionic acid, including a tank body 1. A purification mechanism 2 is arranged on one side of the tank body 1, and a cooling component 5 is arranged on one side of the purification mechanism 2;

[0030] The purification mechanism 2 includes a first motor 201, a rotating column 202, stirring blades 203, a placement groove 204, a resistance wire 205, a partition plate 206, an injection gas pipe 207, a transmission pipe 208, a feeding port 209, a protective cover 210, a filtering component 3 and a separation component 4. The first motor 201 is bolted to the top of the tank body 1, the rotating column 202 is fixedly connected to the output end of the first motor 201, and a plurality of stirring blades 203 are fixedly connected to the outer wall of the rotating column 202. The placement groove 204 is opened inside the tank body 1, the resistance wire 205 is arranged on one side of the placement groove 204, the partition plate 206 is fixedly connected to the inner wall of the tank body 1, the injection gas pipe 207 is fixedly connected to the top of the tank body 1, the transmission pipe 208 is fixedly connected to one side of the tank body 1, the feeding port 209 is opened on the top of the tank body 1, and the protective cover 210 is bolted to the top of the tank body 1. The raw material and the solvent are respectively injected into the tank body 1 from the feeding port 209 and the transmission pipe 208. The resistance wire 205 is electrified to emit heat to heat the mixture. The first motor 201 is started to rotate the rotating column 202 and the stirring blades 203. Used in cooperation with the resistance wire 205, the dissolution rate of the raw material can be accelerated. Through the injection gas pipe 207, an external inert gas is injected into the tank body 1 to prevent the raw material from oxidizing during dissolution. The protective cover 210 can shield and protect the feeding port 209 to prevent external sundries from entering the tank body 1 and affecting subsequent purification.

[0031] As Figure 5 shown, considering that insoluble substances will remain in the mixed compound, the filtering component 3 includes a second motor 301, a rotating column 302, a fixed frame 303, a first screen 304, a baffle 305 and a perforation 306. The second motor 301 is bolted to the bottom of the tank body 1, the rotating column 302 is fixedly connected to the output end of the second motor 301, the fixed frame 303 is fixedly connected to the bottom of the partition plate 206, the first screen 304 is fixedly connected to the outer wall of the rotating column 302, the baffle 305 is fixedly connected to the outer wall of the rotating column 302, and a plurality of perforations 306 are respectively opened in the partition plate 206 and the baffle 305. The second motor 301 is started to rotate the rotating column 302 and the baffle 305, so that the perforations 306 on the baffle 305 coincide with the perforations 306 on the partition plate 206, and the mixed compound can fall on the first screen 304. When the rotating column 302 rotates, it will drive the first screen 304 to rotate, and the liquid will be thrown into the fixed frame 303, while the insoluble substances will be intercepted on the first screen 304.

[0032] As Figure 3As shown in the figure, considering that the filtered compound needs to be crystallized, the separation component 4 includes a pumping pipeline 401, a first water pump 402, an injection pipeline 403, a cover plate 404, a separation tank 405, a separation frame 406 and a second screen 407. The pumping pipeline 401 is fixedly connected to one side of the fixed frame 303. The first water pump 402 is arranged on one side of the pumping pipeline 401. The injection pipeline 403 is arranged on the other side of the first water pump 402. The cover plate 404 is fixedly connected to one side of the injection pipeline 403. The separation tank 405 is bolted to the bottom of the cover plate 404. The separation frame 406 is slidably connected to one side of the separation tank 405. The second screen 407 is arranged on the inner wall of the separation frame 406. By starting the first water pump 402, the separated liquid in the fixed frame 303 can be pumped out and injected into the separation tank 405 through the injection pipeline 403. The user can put the separation frame 406 and the second screen 407 into the separation tank 405 in advance. Subsequently, the liquid enters the separation frame 406 and naturally cools into crystals. Then, the injection pipeline 403 and the cover plate 404 are removed, and the separation frame 406 and the second screen 407 are taken out together. The remaining liquid drops from the second screen 407, while the purified crystals remain on the second screen 407, completing the separation. If the purity of the subsequent crystals is not enough, filtration and separation can be carried out again.

[0033] As Figure 2 shown in the figure, considering that the time for natural cooling of crystals is relatively long, the cooling component 5 includes a flow pipe 501, a water storage tank 502, a second water pump 503 and a circulation pipeline 504. The flow pipe 501 is fixedly connected to one side of the separation tank 405. The water storage tank 502 is fixedly connected to one side of the flow pipe 501. The second water pump 503 is arranged on the top of the water storage tank 502. The circulation pipeline 504 is arranged on the top of the second water pump 503. The other end of the circulation pipeline 504 is fixedly connected to the separation tank 405. By injecting cooling water into the water storage tank 502 and starting the second water pump 503, the cooling water is injected into the separation tank 405 from the circulation pipeline 504. Blocked by the separation frame 406, the cooling water will not directly contact the compound, but can accelerate its cooling. The excess cooling water will return to the water storage tank 502 through the flow pipe 501, completing the circulation.

[0034] As Figure 2 shown in the figure, considering that the raw materials and the solvent will adhere to the inner wall of the tank body 1 when mixed, two support rods 6 are fixedly connected to the outer wall of the rotating column 202. A scraping plate 7 is fixedly connected to one side of the support rod 6. One side of the scraping plate 7 is in close contact with the inner wall of the tank body 1. When the rotating column 202 rotates, it will drive the support rod 6 and the scraping plate 7 to rotate synchronously. When the scraping plate 7 rotates, it can continuously scrape the inner wall of the tank body 1 to prevent the raw materials from adhering.

[0035] As Figure 5As shown in the figure, considering that the mixed compound will flow out from the rotating column 302 and the fixed frame 303, a blocking plate 8 is fixedly connected to the outer wall of the rotating column 302. The blocking plate 8 is in close contact with the inner bottom wall of the fixed frame 303. When the rotating column 302 rotates, it will drive the blocking plate 8 to rotate, and the blocking plate 8 can block the connection between the rotating column 302 and the fixed frame 303 to prevent the liquid from flowing out.

[0036] As Figure 2 shown in the figure, considering that the waste liquid from which crystals are analyzed and the excess coolant need to be discharged, a discharge pipe 9 is fixedly connected to one side of the separation tank 405. A rotary cap 10 is threadedly connected to the outer wall of the discharge pipe 9. By rotating the rotary cap 10, the residual coolant and the analyzed waste liquid in the tank body 1 can be discharged from the discharge pipe 9.

[0037] Specifically, when the (R)-(+)-2-(4-hydroxyphenoxy) propionic acid purification equipment of the present invention is in use: the raw materials and the solvent are respectively injected into the tank body 1 from the feeding port 209 and the transfer pipe 208. The resistance wire 205 is electrified to emit heat to heat the mixture. The first motor 201 is started to rotate the rotating column 202 and the stirring blades 203. In cooperation with the resistance wire 205, the dissolution rate of the raw materials can be accelerated. Through the injection pipe 207, an external inert gas is injected into the tank body 1 to prevent the raw materials from being oxidized during dissolution. The second motor 301 is started to rotate the rotating column 302 and the baffle plate 305, so that the through holes 306 on the baffle plate 305 coincide with the through holes 306 on the partition plate 206, and the mixed compound can fall on the first screen 304. When the rotating column 302 rotates, it will drive the first screen 304 to rotate, and the liquid will be thrown to the fixed frame 303, while the insoluble substances will be intercepted on the first screen 304. The first water pump 402 is started to pump out the separated liquid in the fixed frame 303 and inject it into the separation tank 405 through the injection pipe 403. The user can put the separation frame 406 and the second screen 407 into the separation tank 405 in advance, and then inject the cooling water into the water storage tank 502. The second water pump 503 is started to inject the cooling water into the separation tank 405 from the circulating pipe 504. Blocked by the separation frame 406, the cooling water will not directly contact the compound, but can accelerate its cooling. Subsequently, the injection pipe 403 and the cover plate 404 are removed, and the separation frame 406 and the second screen 407 are taken out together. The remaining liquid drops from the second screen 407 and is discharged from the discharge pipe 9 together with the excess coolant, while the crystals produced after purification will remain on the second screen 407 to complete the separation.

[0038] All the technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementation solutions of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious substitution without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device, comprising a tank (1), characterized in that: A purification mechanism (2) is disposed on one side of the tank body (1), and a cooling component (5) is disposed on one side of the purification mechanism (2); The purification mechanism (2) comprises a first motor (201), a rotating column (202), a stirring blade (203), a placement groove (204), a resistance wire (205), a partition plate (206), an air injection pipe (207), a transmission pipe (208), a feed port (209), a protective cover (210), a filtering component (3) and a separation component (4), wherein the first motor (201) is bolted to the top of the tank body (1), the rotating column (202) is fixedly connected to the output end of the first motor (201), and a plurality of the stirring blades (203) are provided. They are all fixedly connected to the outer wall of the rotating column (202), the placement groove (204) is opened inside the tank body (1), the resistance wire (205) is arranged on one side of the placement groove (204), the partition plate (206) is fixedly connected to the inner wall of the tank body (1), the gas injection pipe (207) is fixedly connected to the top of the tank body (1), the transmission pipe (208) is fixedly connected to one side of the tank body (1), the feeding port (209) is opened at the top of the tank body (1), and the protective cover (210) is bolted to the top of the tank body (1).

2. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 1, characterized in that: The filter assembly (3) comprises a second motor (301), a rotating column (302), a fixed frame (303), a first screen (304), a baffle (305) and a through hole (306); the second motor (301) is bolted to the bottom of the tank body (1); the rotating column (302) is fixedly connected to the output end of the second motor (301); the fixed frame (303) is fixedly connected to the bottom of the partition plate (206); the first screen (304) is fixedly connected to the outer wall of the rotating column (302); the baffle (305) is fixedly connected to the outer wall of the rotating column (302); and a plurality of the through holes (306) are respectively provided inside the partition plate (206) and the baffle (305).

3. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 2, characterized in that: The separation component (4) comprises an extraction pipe (401), a first water pump (402), an injection pipe (403), a cover plate (404), a separation tank (405), a separation frame (406) and a second screen (407), wherein the extraction pipe (401) is fixedly connected to one side of the fixing frame (303), the first water pump (402) is arranged on one side of the extraction pipe (401), the injection pipe (403) is arranged on the other side of the first water pump (402), the cover plate (404) is fixedly connected to one side of the injection pipe (403), the separation tank (405) is bolted to the bottom of the cover plate (404), the separation frame (406) is slidably connected to one side of the separation tank (405), and the second screen (407) is arranged on the inner wall of the separation frame (406).

4. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 3, characterized in that: The cooling assembly (5) comprises a flow pipe (501), a water storage tank (502), a second water pump (503) and a circulation pipe (504); the flow pipe (501) is fixedly connected to one side of a separation tank (405); the water storage tank (502) is fixedly connected to one side of the flow pipe (501); the second water pump (503) is arranged at the top of the water storage tank (502); the circulation pipe (504) is arranged at the top of the second water pump (503); and the other end of the circulation pipe (504) is fixedly connected to the separation tank (405).

5. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 1, characterized in that: Two support rods (6) are fixedly connected to the outer wall of the rotating column (202), one side of the support rod (6) is fixedly connected to a scraper plate (7), and one side of the scraper plate (7) is tightly fitted to the inner wall of the tank body (1).

6. A (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 2, characterized in that: The outer wall of the rotating column (302) is fixedly connected with a blocking plate (8), and the blocking plate (8) is tightly fitted with the inner bottom wall of the fixed frame (303).

7. The (R)-(+)-2-(4-hydroxyphenoxy)propionic acid purification device according to claim 3, characterized in that: A discharge pipe (9) is fixedly connected to one side of the separation tank (405), and a rotating cap (10) is threadedly connected to the outer wall of the discharge pipe (9).

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