CN214051652U

CN214051652U - Reaction kettle for producing N, N' -diisopropyl carbodiimide

Info

Publication number: CN214051652U
Application number: CN202023085094.7U
Authority: CN
Inventors: 许伦本; 孙守峰
Original assignee: Zibo Tiantangshan Chemical Co ltd
Current assignee: Zibo Tiantangshan Chemical Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-27
Anticipated expiration: 2030-12-18

Abstract

The utility model belongs to the technical field of N, N '-diisopropyl carbodiimide production, in particular to a reaction kettle for producing N, N' -diisopropyl carbodiimide, which comprises a kettle body, the top of the kettle body is provided with a motor which is connected with a stirring shaft in the kettle body, the stirring shaft is sequentially provided with a plurality of groups of stirring paddles and anchor type stirring rods from top to bottom, evenly be equipped with a plurality of baffles on the inner wall of the cauldron body, the spiral winding has the coil pipe on the external wall of cauldron, still is equipped with the heat preservation on the external wall of cauldron, and carbon disulfide reinforced line is connected with cauldron body feed inlet, and cauldron body top is equipped with the gas vent, and the gas vent is connected with the absorption tower that sprays through the draught fan, sprays the absorption tower bottom and is connected with the spray tank, and the spray tank is connected with the shower through the spray pump, and the shower is connected with spray absorption tower upper portion, and alkali lye supplyes jar and spray tank and is connected, and the spray tank is connected with the recovery jar. The utility model discloses can make reaction efficiency higher, can make the hydrogen sulfide effective absorption retrieval and utilization of production simultaneously.

Description

Reaction kettle for producing N, N' -diisopropyl carbodiimide

Technical Field

The utility model belongs to the technical field of N, N '-diisopropyl carbodiimide production, concretely relates to reation kettle is used in N, N' -diisopropyl carbodiimide production.

Background

N, N' -diisopropylcarbodiimide is a chemical substance with the molecular formula of C₇H₁₄N₂. N, N' -Diisopropylcarbodiimide (DIC), properties: a colorless transparent liquid; appearance: colorless to light yellow liquid; the main content is more than or equal to 99.0 percent; boiling point: 145-148 ℃; density: 0.815g/mL at 20 ℃; flash point 93 ° F; sensitivity: water absorption; the application is as follows: mainly used as a condensing agent in polypeptide synthesis.

N, N' -diisopropyl carbodiimide (DIC) is an important fine chemical product, has larger molecular weight, higher boiling point and lower vapor pressure, has the performance of a common carbodiimide compound, is stable under the condition of no catalyst, shows strong reactivity under the condition of catalysis, and is a good organic reagent.

When N, N '-diisopropyl carbodiimide is produced, firstly isopropylamine and carbon disulfide are used for synthesizing N, N' -diisopropyl thiourea in a solvent, the temperature is controlled below 35 ℃, the reaction is carried out for 1 hour under heat preservation, and hydrogen sulfide gas can be generated in the reaction process. However, the problems of unstable temperature, incomplete hydrogen sulfide absorption and the like exist in the current production.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the reaction kettle for producing the N, N' -diisopropylcarbodiimide is provided, the reaction efficiency can be higher, and the generated hydrogen sulfide can be effectively absorbed and recycled.

The utility model discloses an adopt following technical scheme to realize:

n, reation kettle is used in production of N' -diisopropyl carbodiimide, including the cauldron body, cauldron body top be equipped with the motor, the internal (mixing) shaft connection of motor and cauldron, the (mixing) shaft is from last to being equipped with multiunit stirring rake and anchor stirring rod down in proper order evenly be equipped with a plurality of baffles on the inner wall of the cauldron body, spiral winding has the coil pipe on the external wall of cauldron, still is equipped with the heat preservation on the external wall of cauldron, the carbon disulfide reinforced line is connected with cauldron body feed inlet, cauldron body top is equipped with the gas vent, the gas vent is connected with the absorption tower that sprays through the draught fan, the absorption tower bottom that sprays is connected with the spray pond, the spray pond is connected with the shower through the spray pump, the shower is connected with spraying absorption tower upper portion, alkali lye supplyes jar and spray pond, the spray pond is connected with the recovery tank.

Preferably, the multi-group stirring paddles are rhombic stirring paddles arranged in a staggered mode, the anchor type stirring rod is arranged at the bottom of the stirring shaft, and the rhombic stirring paddles can reduce resistance of liquid during stirring and avoid overlarge loss of the motor.

Preferably, the kettle body is provided with a pressure sensor and a temperature sensor.

Preferably, the carbon disulfide feed line is provided with a flow control valve and a flow meter.

Preferably, a gas control valve is arranged at the gas outlet.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up spiral coil pipe cooperation heat preservation and can make temperature better control in the reation kettle, more stable, multilayer stirring rake and anchor formula puddler cooperation baffle simultaneously can make reactant intensive mixing mix, and the reaction is more high-efficient.

2. The utility model discloses can generate sodium sulfide solution with the effectual absorption of hydrogen sulfide gas body that the reaction produced for the desulfurization reaction of secondary oxidation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. a kettle body; 2. a pressure sensor; 3. a carbon disulfide feed line; 4. a flow control valve; 5. a flow meter; 6. a motor; 7. a temperature sensor; 8. an exhaust port; 9. a gas control valve; 10. an induced draft fan; 11. spraying an absorption tower; 12. a shower pipe; 13. a spray tank; 14. a spray pump; 15. an alkali liquor replenishing tank; 16. a recovery tank; 17. a coil pipe; 18. a heat-insulating layer; 19. A baffle plate; 20. an anchor type stirring rod; 21. a stirring shaft; 22. and (4) a stirring paddle.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the reaction kettle for producing N, N' -diisopropylcarbodiimide comprises a kettle body 1, a motor 6 is arranged at the top of the kettle body 1, the motor 6 is connected with a stirring shaft 21 in the kettle body 1, the stirring shaft 21 is sequentially provided with a plurality of groups of stirring paddles 22 and anchor type stirring rods 20 from top to bottom, a plurality of baffles 19 are uniformly arranged on the inner wall of the kettle body 1, a coil 17 is spirally wound on the outer wall of the kettle body 1, a heat insulation layer 18 is also arranged on the outer wall of the kettle body 1, a carbon disulfide feeding line 3 is connected with a feeding port of the kettle body 1, an exhaust port 8 is arranged at the top of the kettle body 1, the exhaust port 8 is connected with a spray absorption tower 11 through an induced draft fan 10, the bottom of the spray absorption tower 11 is connected with a spray tank 13, the spray tank 13 is connected with a spray pipe 12 through a spray pump 14, the spray pipe 12 is connected with the upper part of the spray absorption tower 11, an alkali lye supplement tank 15 is connected with the spray tank 13, the spray tank 13 is connected to a recovery tank 16.

The multiple groups of stirring paddles 22 are rhombic stirring paddles arranged in a staggered mode, and the anchor type stirring rod 20 is arranged at the bottom of the stirring shaft 21.

The kettle body 1 is provided with a pressure sensor 2 and a temperature sensor 7.

And a flow control valve 4 and a flow meter 5 are arranged on the carbon disulfide charging line 3.

And a gas control valve 9 is arranged at the exhaust port 8.

When the reactor works, firstly, the isopropylamine and the toluene solvent are put into the reaction kettle, the stirring is started, then the carbon disulfide in the carbon disulfide feeding line 3 is dripped into the reaction kettle for reaction under the action of the flow control valve 4 and the flow meter 5, the temperature in the kettle is controlled below 35 ℃ by introducing the refrigerant into the coil 17, reacting for 1 hour under the action of the heat preservation layer 18, generating a large amount of hydrogen sulfide gas, leading the hydrogen sulfide gas to enter a spray absorption tower 11 from an exhaust port 8 at the top of a kettle body 1 under the action of a draught fan 10, conveying a 30 mass percent sodium hydroxide solution to a spray tank 13 by an alkali liquor replenishing tank 15, then the sodium hydroxide and hydrogen sulfide gas react to generate sodium sulfide by introducing the sodium hydroxide into the upper part of a spray absorption tower 11 through a spray pipe 12 under the action of a spray pump 14 for spraying, after the absorption is finished, the sodium sulfide solution in the spray tank 13 is conveyed to the recovery tank 16 for desulfurization reaction of secondary oxidation.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. The utility model provides a reation kettle is used in production of N, N' -diisopropyl carbodiimide, includes cauldron body (1), its characterized in that: the reactor is characterized in that a motor (6) is arranged at the top of the reactor body (1), the motor (6) is connected with a stirring shaft (21) in the reactor body (1), the stirring shaft (21) is sequentially provided with a plurality of groups of stirring paddles (22) and anchor type stirring rods (20) from top to bottom, a plurality of baffles (19) are uniformly arranged on the inner wall of the reactor body (1), a coil pipe (17) is spirally wound on the outer wall of the reactor body (1), a heat preservation layer (18) is also arranged on the outer wall of the reactor body (1), a carbon disulfide feeding line (3) is connected with a feed inlet of the reactor body (1), an exhaust port (8) is arranged at the top of the reactor body (1), the exhaust port (8) is connected with a spray absorption tower (11) through an induced draft fan (10), the bottom of the spray absorption tower (11) is connected with a spray tank (13), the spray tank (13) is connected with a spray pipe (12) through a spray pump (14), and the spray pipe (12) is connected with the upper part of the spray absorption tower (11), the alkali liquor replenishing tank (15) is connected with the spraying pool (13), and the spraying pool (13) is connected with the recovery tank (16).

2. The reaction kettle for producing N, N' -diisopropylcarbodiimide according to claim 1, wherein: the multiple groups of stirring paddles (22) are rhombic stirring paddles arranged in a staggered mode, and the anchor type stirring rod (20) is arranged at the bottom of the stirring shaft (21).

3. The reaction kettle for producing N, N' -diisopropylcarbodiimide according to claim 1, wherein: the kettle body (1) is provided with a pressure sensor (2) and a temperature sensor (7).

4. The reaction kettle for producing N, N' -diisopropylcarbodiimide according to claim 1, wherein: and a flow control valve (4) and a flow meter (5) are arranged on the carbon disulfide feeding line (3).

5. The reaction kettle for producing N, N' -diisopropylcarbodiimide according to claim 1, wherein: a gas control valve (9) is arranged at the exhaust port (8).