Efficient separation and purification device for triethyl phosphite

Abstract

The utility model relates to an efficient separation and purification device for triethyl phosphite, which comprises a first treatment tank, a second treatment tank, a first stirring mechanism and a second stirring mechanism, and is characterized in that the top of the first treatment tank is provided with a treatment liquid inlet, a cleaning water inlet and a sodium carbonate feeding port, and the bottom of the first treatment tank is connected with a tee joint; an oil-water detection sensor is arranged at an inlet of the tee joint, the tail end of an outlet pipeline of the filter is connected with an inlet of a lifting pump, and an outlet pipeline of the lifting pump is communicated with an inlet of a second treatment tank; a deflection baffle assembly is arranged in the top of the second treatment tank, a gas phase outlet is formed in the top of the second treatment tank and communicated with an inlet of a condenser, an outlet of the condenser is communicated with a product collecting tank, and the condenser is further connected with a vacuum unit. The device remarkably improves the product purification efficiency, meets various treatment requirements of products, and is good in purification effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to triethyl phosphite production equipment technical field, concretely relates to a kind of triethyl phosphite high-efficiency separation and purification device. BACKGROUND

[0002] Triethyl phosphite is an important organic chemical intermediate, is used to produce organophosphorus pesticide such as methiocarb in pesticide;It is used to produce fluorescent whitening agent in dye;It is used to produce analgesic and anti-infective agent in medicine;It is used to produce plasticizer and stabilizer in plastic industry;It can also be used for dye and gasoline additive, so it is a fine organic chemical product with very wide application. At present, the annual demand of triethyl phosphite is huge in China, and with the widening of its application range, the market demand is growing.

[0003] When producing triethyl phosphite, anhydrous ethanol, organic solvent, catalyst trioctylamine and acid-binding agent can be uniformly mixed to obtain a mixed solution;The mixed solution is cooled, the system temperature is maintained at a set temperature, and phosphorus trichloride solution is added dropwise into the mixed solution, and after the addition is completed, the temperature is maintained for a set time, to obtain a reaction liquid, and then the crude triethyl phosphite can be separated. To ensure product quality, the crude triethyl phosphite needs to be further purified.

[0004] CN 218686360 U discloses a kind of organic compound quick separation and purification device, its top surface can be detached and installed with cover plate, the left and right two sides of tank body are fixedly installed with fixed block, the bottom surface of two fixed blocks rests with bottom bin, the back of tank body is fixedly installed with motor, the output shaft of motor is fixedly installed with one end of transmission rod, the other end of transmission rod penetrates the back of tank body and extends to its inside, and is rotatably connected with the front inner wall of tank body by bearing, the outer circumferential wall of transmission rod is fixedly sleeved with roller shaft, the outer circumferential wall of roller shaft is fixedly installed with a plurality of square frames, and a plurality of square frames are embedded with filter screen. The motor of the device drives the roller shaft to rotate, so that the square frame rolls over the organic compound liquid in the tank body, so that the liquid is heated uniformly, the liquid heated at the bottom is evaporated quickly, and the purification efficiency is improved. But there are still the following problems: 1. For organic compounds requiring high-temperature evaporation separation and purification environment, the separation efficiency needs to be improved;2. Only with evaporation separation and purification function, the function is single. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of triethyl phosphite high-efficiency separation and purification device with reasonable structure and reliable use to solve the above problems, which significantly improves the purification efficiency of product, meets the various processing requirements of product, and has good purification effect.

[0006] The technical scheme of the utility model is:

[0007] The application discloses a triethyl phosphite high-efficiency separation and purification device, which comprises a first treatment tank, a second treatment tank, a first stirring mechanism arranged in the first treatment tank, a second stirring mechanism arranged in the second treatment tank, a first heating interlayer arranged on the side wall of the first treatment tank and a second heating interlayer arranged on the side wall of the second treatment tank, and the technical key points are as follows: a treatment liquid inlet, a cleaning water inlet and a sodium carbonate feeding port are arranged on the top of the first treatment tank; a three-way joint is connected to the bottom of the first treatment tank; one outlet of the three-way joint is connected with a cleaning liquid outlet pipeline; the other outlet of the three-way joint is connected with an inlet pipeline of a filter; an oil-water detection sensor is arranged on the inlet of the three-way joint; the outlet pipeline of the filter is connected with the inlet of a lifting pump; the outlet pipeline of the lifting pump is communicated with the inlet of the second treatment tank; a baffle assembly is arranged in the top of the second treatment tank; a gas phase outlet is arranged on the top of the second treatment tank and is communicated with the inlet of a condenser; the outlet of the condenser is communicated with a product collecting tank; and the condenser is connected with a vacuum unit.

[0008] The triethyl phosphite high-efficiency separation and purification device has the filter, which is provided with an inclined baffle and is divided into a front filtering cavity and a rear purification cavity by the inclined baffle; the inclined baffle is uniformly provided with filtering holes; and the lower end of the outlet pipeline of the filter is inserted into the lower part of the rear purification cavity.

[0009] The triethyl phosphite high-efficiency separation and purification device has the baffle assembly, which comprises multiple layers of horizontal baffles, an integrated fixing ring connected with the centers of the horizontal baffles and an integrated positioning sleeve connected with the outer edges of the horizontal baffles; the horizontal baffles are uniformly provided with multiple through holes; and the through holes on adjacent two layers of horizontal baffles are arranged in a staggered mode.

[0010] The triethyl phosphite high-efficiency separation and purification device has the condenser, which is provided with a bypass; a circulating port is arranged on the side wall of the second treatment tank below the baffle assembly; and the end of the bypass is communicated with the circulating port.

[0011] The triethyl phosphite high-efficiency separation and purification device has the first heating interlayer and the second heating interlayer, and the bottoms of the first heating interlayer and the second heating interlayer are respectively provided with hydrophobic valves.

[0012] The triethyl phosphite high-efficiency separation and purification device has the first treatment tank, which is provided with a first stirring motor; the first stirring mechanism is a first stirring paddle; and the upper end of the stirring shaft of the first stirring paddle is fixedly connected with the output end of the first stirring motor; the second treatment tank is provided with a second stirring motor; the second stirring mechanism is a second stirring paddle; and the upper end of the stirring shaft of the second stirring paddle is fixedly connected with the output end of the second stirring motor.

[0013] The triethyl phosphite high-efficiency separation and purification device has the second treatment tank, which is provided with a liquid phase outlet.

[0014] The utility model discloses the beneficial effect is:

[0015] When using, the device utilizes first processing jar to the liquid to be handled multiple water washing, after washing, oil phase and water phase delamination, water phase is below, and through the cleaning fluid output pipeline output, and through oil -water detection sensor detection whether output thoroughly, after washing, through sodium carbonate feeding port adds sodium carbonate, and after stirring, exports to filter, and utilizes filter to carry out solid -liquid separation, after separating, into second processing jar and carries out negative pressure distillation, accelerates separation speed, and the purification efficiency is improved significantly. Simultaneously satisfied triethyl phosphite separation processing demand, and the purification effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the utility model.

[0017] In the drawing: 1. sodium carbonate feeding port, 2. first processing jar, 3. cleaning water inlet, 4. processing liquid inlet, 5. first heating interlayer, 6. first stirring paddle, 7. cleaning fluid output pipeline, 8. three-way, 9. inlet pipeline, 10. oil -water detection sensor, 11. filter, 12. inclined baffle, 13. outlet pipeline, 14. booster pump, 15. second processing jar, 16. first stirring motor, 17. baffle assembly, 18. second stirring motor, 19. condenser, 20. vacuum unit, 21. circulation, 22. product collection jar, 23. second stirring paddle, 24. second heating interlayer, 25. drain valve, 26. liquid phase outlet. DETAILED DESCRIPTION

[0018] According to the description of the drawings to the utility model is described in detail.

[0019] As Figure 1 Shown, this triethyl phosphite high -efficient separation and purification device, including first processing jar 2, second processing jar 15, be located in first processing jar 2 in first stirring mechanism, be located in second processing jar 15 in second stirring mechanism, be located on the first heating interlayer 5 of first processing jar 2 lateral wall, be located on the second heating interlayer 24 of second processing jar 15 lateral wall. The top of first processing jar 2 is equipped with first stirring motor 16, the first stirring mechanism is first stirring paddle 6, the stirring shaft upper end of first stirring paddle is connected fixed with the output end of first stirring motor 16;The top of second processing jar 15 is equipped with second stirring motor 18, the second stirring mechanism is second stirring paddle 23, the stirring shaft upper end of second stirring paddle 23 is connected fixed with the output end of second stirring motor 18. The bottom of first heating interlayer 5 and second heating interlayer 24 is equipped with drain valve 25 respectively.

[0020] The top of the first treatment tank 2 is provided with a treatment liquid inlet 4, a cleaning water inlet 3 and a sodium carbonate feeding port 1. The bottom of the first treatment tank 2 is connected with a three-way joint 8, one outlet of which is connected with a cleaning liquid output pipeline 7, the other outlet is connected with an inlet pipeline 9 of a filter, and the inlet of the three-way joint 8 is provided with an oil-water detection sensor 10. In the embodiment, the filter 11 is provided with an inclined baffle 12 and is divided into a front filtering cavity and a rear purification cavity by the inclined baffle 12, the inclined baffle 12 is uniformly provided with filtering holes, and the outlet pipeline 13 of the filter 11 is inserted into the lower part of the rear purification cavity.

[0021] The outlet pipeline 13 of the filter 11 is connected with the inlet of a lifting pump 14, and the outlet pipeline of the lifting pump 14 is communicated with the inlet of a second treatment tank 15. The top of the second treatment tank 15 is internally provided with a baffle assembly 17. In the embodiment, the baffle assembly 17 comprises multiple layers of horizontal baffles, an integral fixing ring connected with the center of each layer of horizontal baffles, and an integral positioning sleeve connected with the outer edge of each layer of horizontal baffles, the horizontal baffles are uniformly provided with multiple through holes, and the through holes on adjacent two layers of horizontal baffles are arranged in a staggered manner.

[0022] The top of the second treatment tank 15 is provided with a gas phase outlet which is communicated with the inlet of a condenser 19, the outlet of the condenser 19 is communicated with a product collection tank 22, and the condenser 19 is further connected with a vacuum unit 20. In the embodiment, a bypass is arranged on the outlet pipeline of the condenser 19, a circulating port 21 is arranged on the side wall of the second treatment tank 15 below the baffle assembly 17, and the end of the bypass is communicated with the circulating port 21. The bottom of the second treatment tank 15 is provided with a liquid phase outlet 26.

[0023] Working principle:

[0024] 1. The triethyl phosphite production reaction liquid, i.e. the liquid to be treated, is first injected into the first treatment tank 2, purified water is added through the cleaning water inlet 3, the first stirring motor 16 is started, the first stirring paddle 6 is rotated, and the two are uniformly mixed in a heated state. After a set time, the liquid is statically stratified, with the water phase at the bottom and the oil phase at the top.

[0025] 2. The water phase is output through the cleaning liquid output pipeline 7, and the oil-water detection sensor 10 detects in real time whether the output liquid is a water phase. After the state changes, the output is stopped. Purified water is added again for secondary water washing, and the above operation is repeated to complete three times of water washing.

[0026] 3. After washing, sodium carbonate is added through sodium carbonate feed port 1, stirred, and then output to filter 11. Solid-liquid separation is performed using filter 11. After separation, the material enters the second processing tank 15 for negative pressure distillation. During this process, the material is stirred by the second stirring paddle 23 to increase the separation speed. The vacuum unit 20 is used to maintain a set vacuum of -0.9 MPa in the second processing tank 15, and the steam in the second heating jacket 24 is used to achieve a high temperature environment of 110°C. After negative pressure distillation, the gas phase enters the condenser 19, and is then condensed in the condenser 19 and enters the product collection tank 22 to obtain triethyl phosphite.

[0027] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A device for high-efficiency separation and purification of triethyl phosphite, comprising a first treatment tank, a second treatment tank, a first stirring mechanism arranged in the first treatment tank, a second stirring mechanism arranged in the second treatment tank, a first heating interlayer arranged on the side wall of the first treatment tank, and a second heating interlayer arranged on the side wall of the second treatment tank, characterized in that: The top of the first treatment tank is provided with a treatment liquid inlet, a cleaning water inlet and a sodium carbonate feeding port, the bottom of the first treatment tank is connected with a tee joint, one outlet of the tee joint is connected with a cleaning liquid outlet pipeline, the other outlet is connected with an inlet pipeline of a filter, the inlet of the tee joint is provided with an oil-water detection sensor, the outlet pipeline of the filter is connected with the inlet of a booster pump, the outlet pipeline of the booster pump is communicated with the inlet of a second treatment tank, the top of the second treatment tank is internally provided with a baffle assembly, the top of the second treatment tank is provided with a gas phase outlet which is communicated with the inlet of a condenser, the outlet of the condenser is communicated with a product collecting tank, and the condenser is further connected with a vacuum unit.

2. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The filter is provided with an inclined baffle and is divided into a front filtering cavity and a rear purification cavity by the inclined baffle, the inclined baffle is uniformly provided with filter holes, and the lower end of the outlet pipeline of the filter is inserted into the lower part of the rear purification cavity.

3. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The baffle assembly comprises multiple layers of horizontal baffles, an integral fixing ring connected with the center of each layer of horizontal baffles, and an integral positioning sleeve connected with the outer edge of each layer of horizontal baffles, the horizontal baffles are uniformly provided with multiple through holes, and the through holes on adjacent two layers of horizontal baffles are arranged alternately.

4. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The outlet pipeline of the condenser is provided with a bypass, the side wall of the second treatment tank is provided with a circulation port below the baffle assembly, and the end of the bypass is communicated with the circulation port.

5. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The bottom of the first heating interlayer and the second heating interlayer is respectively provided with a hydrophobic valve.

6. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The top of the first treatment tank is provided with a first stirring motor, the first stirring mechanism is a first stirring paddle, and the upper end of the stirring shaft of the first stirring paddle is fixedly connected with the output end of the first stirring motor; the top of the second treatment tank is provided with a second stirring motor, the second stirring mechanism is a second stirring paddle, and the upper end of the stirring shaft of the second stirring paddle is fixedly connected with the output end of the second stirring motor.

7. The triethyl phosphite high-efficiency separation and purification device according to claim 1, characterized in that: The bottom of the second treatment tank is provided with a liquid phase outlet.

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