CN219186841U

CN219186841U - Transesterification catalyst recovery unit

Info

Publication number: CN219186841U
Application number: CN202320114412.2U
Authority: CN
Inventors: 王磊; 齐涛; 张成林; 许才宇; 张杨
Original assignee: Shaanxi Aikelaite New Material Co ltd
Current assignee: Shaanxi Aikelaite New Material Co ltd
Priority date: 2023-01-19
Filing date: 2023-01-19
Publication date: 2023-06-16
Anticipated expiration: 2033-01-19

Abstract

The utility model discloses a transesterification catalyst recovery device, which comprises a material cleaning tank, a dissolution neutralization tank, a standing liquid separation tank, a spray dryer, a high-temperature drying box and a waste liquid collection tank; the material cleaning tank, the dissolution neutralization tank, the static liquid separating tank and the spray dryer are sequentially communicated, the spray dryer is provided with an upper outlet and a lower outlet, the upper outlet of the spray dryer is connected with the inlet of the waste liquid collecting tank, and the lower outlet of the spray dryer is connected with the inlet of the high-temperature drying box. The transesterification catalyst recovery device provided by the utility model can recover and reuse the transesterification catalyst used in the production of the antioxidant 1010 and the antioxidant 1076, reduces the use amount of the alkali metal catalyst, and reduces the generation of solid waste, thereby improving the economic benefit and reducing the pollution of the solid waste to the environment.

Description

Transesterification catalyst recovery unit

Technical Field

The utility model belongs to the technical field of chemical equipment, and particularly relates to a transesterification catalyst recovery device.

Background

Transesterification is the reaction of an ester with an alcohol/acid/ester under acid or base catalysis to form a new ester and a new alcohol/acid/ester. The transesterification is a common reaction in the reaction process of synthesizing the hindered phenol antioxidant 1010 and the antioxidant 1076, and because the transesterification is a reversible process, high temperature and high vacuum are often required in the reaction process to push the reaction to proceed in the forward direction, so that a large amount of energy is required to be consumed. The addition of the transesterification catalyst can not only reduce the reaction temperature and the production energy consumption, but also reduce the problem of difficult purification caused by incomplete reaction. Therefore, the transesterification catalyst is an indispensable condition in the production process of the antioxidant 1010 and the antioxidant 1076.

The most commonly used transesterification catalysts currently used in the production of antioxidants are alkali metal catalysts such as sodium methoxide, lithium amide, sodium ethoxide, potassium tert-butoxide, and the like. The catalyst has better catalytic effect on transesterification when used singly or in combination.

In the prior art, after the catalytic reaction of the alkali metal catalyst is finished, a certain amount of acid is added into a reaction system to react with the alkali metal catalyst to form salt, and then the salt is filtered out of the reaction solution to achieve the purpose of separating the catalyst. The alkali metal catalyst after the production process can not be used any more and can only be used as solid waste treatment, so that certain environmental pollution can be caused; the next batch of reaction requires the addition of a new batch of alkali metal catalyst. Most of the alkali metal catalysts are expensive, and the large amount of alkali metal catalysts cannot be recovered after being used, so that the production cost of enterprises is increased.

Disclosure of Invention

The utility model aims at the problems and overcomes the defects of the prior art, and provides a recovery device of a transesterification catalyst, which comprises a material cleaning tank, a dissolution neutralization tank, a static liquid separation tank, a spray dryer, a high-temperature drying box and a waste liquid collecting tank;

the outlet of the material cleaning tank is connected with the inlet of the dissolution neutralization tank, the outlet of the dissolution neutralization tank is connected with the inlet of the static liquid separating tank, the outlet of the static liquid separating tank is connected with the inlet of the spray dryer, the spray dryer is provided with an upper outlet and a lower outlet, the upper outlet of the spray dryer is connected with the inlet of the waste liquid collecting tank, and the lower outlet of the spray dryer is connected with the inlet of the high-temperature drying tank.

Preferably, the material cleaning tank is provided with a solvent feed port, a solid feed port, a solvent discharge port and a microporous filter screen.

Preferably, the dissolution neutralization tank is provided with a pH meter which is provided at the top of the dissolution neutralization tank and extends to the bottom of the dissolution neutralization tank.

Preferably, the static liquid separating tank is provided with an exhaust valve.

Preferably, the spray dryer is provided with a window.

Preferably, a condenser is arranged between the upper outlet of the spray dryer and the inlet of the waste liquid collection tank.

Preferably, the high-temperature drying box is provided with an exhaust valve and a box door.

Preferably, the dissolution neutralization tank is provided with a water inlet and an alkali liquor feed inlet.

Preferably, the static liquid separating tank is provided with a solvent discharging port.

Preferably, the waste liquid collection tank is provided with a waste liquid discharge port.

The utility model has the beneficial effects that:

the transesterification catalyst recovery device provided by the utility model can recover and reuse transesterification catalysts used in the production of the antioxidant 1010 and the antioxidant 1076, reduces the use amount of expensive alkali metal catalysts, reduces the generation of solid waste, improves the economic benefit and reduces the pollution of the solid waste to the environment.

Drawings

FIG. 1 is a schematic diagram of a transesterification catalyst recovery apparatus according to the present utility model.

In the figure: 1 is a material cleaning tank; 2 is a dissolution neutralization tank; 3 is a standing liquid separating tank; 4 is a spray dryer; 5 is a high-temperature drying box; 6 is a waste liquid collecting tank; 7 is a microporous filter screen; 8 is a pH meter; 9 is an exhaust valve; 10 is a window; 11 is a condenser; 12 is an exhaust valve; 13 is a box door; 14 is a solid feed inlet; 15 is a solvent feed inlet; 16 is a solvent discharge port; 17 is a water inlet; 18 is alkali liquor feed inlet; 19 is a solvent discharge port; 20 is a waste liquid discharge port.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description is presented by way of example only and is not intended to limit the utility model.

Referring to fig. 1, a recovery device of transesterification catalyst comprises a material cleaning tank 1, a dissolution neutralization tank 2, a static liquid separation tank 3, a spray dryer 4, a high-temperature drying box 5 and a waste liquid collection tank 6;

the outlet of the material cleaning tank 1 is connected with the inlet of the dissolution neutralization tank 2, the outlet of the dissolution neutralization tank 2 is connected with the inlet of the static liquid separating tank 3, the outlet of the static liquid separating tank 3 is connected with the inlet of the spray dryer 4, the spray dryer 4 is provided with an upper outlet and a lower outlet, the upper outlet of the spray dryer 4 is connected with the inlet of the waste liquid collecting tank 6, and the lower outlet of the spray dryer 4 is connected with the inlet of the high-temperature drying box 5.

Specifically, the material cleaning tank 1 is provided with a solvent feed port 15, a solid feed port 14, a solvent discharge port 16 and a microporous filter screen 7.

Specifically, the dissolution neutralization tank 2 is provided with a pH meter 8, and the pH meter 8 is provided at the top of the dissolution neutralization tank 2 and extends to the bottom of the dissolution neutralization tank 2.

Specifically, the stationary liquid separation tank 3 is provided with an exhaust valve 9.

Specifically, the spray dryer 4 is provided with a window 10.

Specifically, a condenser 11 is provided between the upper outlet of the spray dryer 4 and the inlet of the waste liquid collection tank 6.

Specifically, the high temperature drying box 5 is provided with an exhaust valve 12 and a box door 13.

Specifically, the dissolution neutralization tank 2 is provided with a water inlet 17 and a lye feed port 18.

Specifically, the stationary liquid separation tank 3 is provided with a solvent discharge port 19.

Specifically, the waste liquid collection tank 6 is provided with a waste liquid discharge port 20.

The working process of the utility model is as follows:

the used transesterification catalyst is discharged from a filter of an antioxidant 1010 production device, and the discharged substance is called filter salt, and the filter salt is the transesterification catalyst to be recovered. The filter salt is added into the material cleaning tank 1 through the solid feed port 14, the cleaning solvent is added into the material cleaning tank 1 through the solvent feed port 15, and a stirring device in the material cleaning tank 1 is started, so that organic matters such as antioxidants and the like attached to the surface of the filter salt are sufficiently cleaned. The washed filter salt becomes a mixed solution of the washed catalyst and the washing solvent, the mixed solution is filtered by a microporous filter screen 7, the washing solvent is discharged from a solvent discharge port 16 and can be recycled, the washed catalyst enters a dissolution neutralization tank 2 through a pipeline, water is injected into the dissolution neutralization tank 2 through a water inlet 17 for dissolving the washed catalyst, alkali liquor is added into the dissolution neutralization tank 2 through an alkali liquor feed port 18 until the indication number of a pH meter 8 is 11-12, and the alkali solution is obtained through stirring. Injecting alkaline solution in the dissolution neutralization tank 2 into a static liquid separating tank 3 through a pipeline, standing until the organic solvent and water are layered, regulating the air pressure in the static liquid separating tank 3 by an exhaust valve 9 to keep normal pressure, discharging the organic solvent through a solvent discharging port 19, enabling a lower aqueous solution of the alkaline solution to enter a spray dryer 4, evaporating water through the drying effect of the spray dryer 4, condensing the distilled water through an upper outlet of the spray dryer 4 through a condenser 11, enabling the condensed water to enter a waste liquid collecting tank 6, accumulating waste liquid, and discharging the accumulated waste liquid through a waste liquid discharging port 20; the solid dried by the spray dryer 4 enters the high temperature drying box 5 through a pipeline, and the drying process of the spray dryer 4 can be observed and detected through the window 10. The dried solid is dried and activated at high temperature in a high-temperature drying box 5 to obtain the recovered and reusable transesterification catalyst, the recovered and reusable transesterification catalyst is taken out from a box door 13, and the gas generated in the drying and activating process is discharged from an exhaust valve 12.

It should be understood that the foregoing detailed description of the present utility model is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present utility model, and those skilled in the art should understand that the present utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.

Claims

1. The transesterification catalyst recovery device is characterized by comprising a material cleaning tank (1), a dissolution neutralization tank (2), a standing liquid separation tank (3), a spray dryer (4), a high-temperature drying box (5) and a waste liquid collection tank (6);

wherein, material washs jar (1) and sets up the export, the export of material washs jar (1) links to each other with the import of dissolving neutralization jar (2), and the export of dissolving neutralization jar (2) links to each other with the import of standing liquid separation jar (3), and the export of standing liquid separation jar (3) links to each other with the import of spray dryer (4), spray dryer (4) set up export and export down, the export links to each other with the import of waste liquid collection tank (6) on spray dryer (4), and the export links to each other with the import of high temperature drying box (5) under spray dryer (4).

2. A transesterification catalyst recovery device according to claim 1, wherein the material washing tank (1) is provided with a solvent feed port (15), a solid feed port (14), a solvent discharge port (16) and a microporous filter screen (7).

3. A transesterification catalyst recovery device according to claim 1, characterised in that the dissolution neutralisation tank (2) is provided with a pH meter (8), the pH meter (8) being arranged at the top of the dissolution neutralisation tank (2) and extending to the bottom of the dissolution neutralisation tank (2).

4. A transesterification catalyst recovery apparatus according to claim 1, wherein said stationary knock-out pot (3) is provided with an exhaust valve (9).

5. A transesterification catalyst recovery device according to claim 1, wherein the spray dryer (4) is provided with a window (10).

6. A transesterification catalyst recovery device according to claim 1, wherein a condenser (11) is provided between the upper outlet of the spray dryer (4) and the inlet port of the waste liquid collection tank (6).

7. The transesterification catalyst recovery apparatus of claim 1, wherein the high temperature drying oven (5) is provided with an exhaust valve (12) and an oven door (13).

8. A transesterification catalyst recovery device according to claim 1, wherein the dissolution neutralization tank (2) is provided with a water inlet port (17) and a lye inlet port (18).

9. A transesterification catalyst recovery apparatus according to claim 1, wherein the stationary liquid separation tank (3) is provided with a solvent discharge port (19).

10. A transesterification catalyst recovery device according to claim 1, wherein the waste liquid collection tank (6) is provided with a waste liquid discharge outlet (20).