CN217368381U - N, N' -diisopropyl carbodiimide production reaction system - Google Patents
N, N' -diisopropyl carbodiimide production reaction system Download PDFInfo
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- CN217368381U CN217368381U CN202220540367.2U CN202220540367U CN217368381U CN 217368381 U CN217368381 U CN 217368381U CN 202220540367 U CN202220540367 U CN 202220540367U CN 217368381 U CN217368381 U CN 217368381U
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- reaction kettle
- heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model belongs to the technical field of N, N '-diisopropyl carbodiimide production, in particular to a N, N' -diisopropyl carbodiimide production reaction system, a motor is arranged at the top of a reaction kettle, the motor is connected with a stirring shaft in the reaction kettle, the stirring shaft is provided with a dispersion disc, a plurality of layers of stirring paddles and an anchor frame type stirring rod from top to bottom in sequence, the bottom of the reaction kettle is connected with the upper part of the reaction kettle through a circulating pump and a circulating pipeline, the circulating pipeline is provided with a circulating secondary line, the circulating secondary line is provided with a heat exchanger, and the outlet of the heat exchanger is connected with the circulating pipeline; the top exhaust port of the reaction kettle is connected with the multistage spray absorption towers which are connected in series. The utility model discloses a set up the heat exchanger on the circulation subline, the circulation material is carried to reation kettle upper portion entry by the circulation pipeline again after heat exchanger adjustment temperature to make the temperature of the material of participating in the reaction more controllable, can make the interior material intensive mixing of jar simultaneously, the mixed effect is better, thereby improves production efficiency and product quality.
Description
Technical Field
The utility model belongs to the technical field of N, N '-diisopropyl carbodiimide produces, concretely relates to N, N' -diisopropyl carbodiimide production reaction system.
Background
N, N' -diisopropylcarbodiimide is a chemical substance with the molecular formula of C 7 H 14 N 2 . 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, low production yield, unsuitability for large-scale production 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 defects of the prior art are overcome, the reaction system for producing the N, N' -diisopropylcarbodiimide is provided, the reaction temperature can be ensured to be stable, and the production efficiency is improved.
The utility model discloses an adopt following technical scheme to realize:
the N, N' -diisopropylcarbodiimide production reaction system comprises a reaction kettle, wherein a motor is arranged at the top of the reaction kettle and connected with a stirring shaft in the reaction kettle, the stirring shaft is sequentially provided with a dispersion disc, a plurality of layers of stirring paddles and an anchor frame type stirring rod from top to bottom, the bottom of the reaction kettle is connected with the upper part of the reaction kettle through a circulating pump and a circulating pipeline, a circulating secondary line is arranged on the circulating pipeline, a heat exchanger is arranged on the circulating secondary line, and an outlet of the heat exchanger is connected with the circulating pipeline;
carbon disulfide adds the stockline and is connected with reation kettle's feed inlet, and reation kettle's top gas vent is connected with absorbing device, absorbing device sprays the absorption tower including the multistage of establishing ties, and every grade of bottom that sprays the absorption tower all is connected with corresponding spray tank, and spray tank and shower are connected, and the shower is connected with the upper portion that sprays the absorption tower, and alkali lye supplyes the jar and is connected with spray tank at different levels in proper order, and the gas vent sprays the absorption tower through pressure device and first order and is connected, and first order spray tank is connected with the recovery jar.
Preferably, the carbon disulfide feed line is provided with a flow control valve and a flow meter.
Preferably, the multilayer stirring paddle is at least provided with layers, and the stirring paddle is a rhombic stirring paddle.
Preferably, the outer wall of the reaction kettle is provided with a jacket, and a plurality of flow guide rings are uniformly arranged in the jacket, so that heat transfer in the jacket is more uniform, and the temperature is easier to control.
Preferably, an electromagnetic flowmeter, an electromagnetic valve and a thermometer are arranged on the circulating pipeline, and a secondary line electromagnetic valve and a secondary line electromagnetic flowmeter are arranged on the circulating secondary line.
Preferably, the top outlet of the spray absorption tower at the last stage is connected with a Claus sulfur system, and the residual hydrogen sulfide gas enters the Claus sulfur system to be effectively recovered.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a set up the material circulation of dispersion impeller, multilayer stirring rake and anchor frame formula puddler cooperation tank bottoms, can be so that the interior material intensive mixing of jar, the mixed effect is better to improve production efficiency and product quality.
2. The utility model discloses a set up the heat exchanger on the circulation subline, the circulation material is carried to reation kettle upper portion entry by the circulation pipeline again behind the heat exchanger temperature adjustment to the temperature of the material of feasible participation reaction is more controllable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. a carbon disulfide feed line; 2. a flow control valve; 3. a flow meter; 4. a reaction kettle; 5. a motor; 6. a stirring shaft; 7. a dispersion tray; 8. a stirring paddle; 9. an anchor frame type stirring rod; 10. a jacket; 11. a flow guide ring; 12. a circulation pump; 13. a secondary line solenoid valve; 14. an auxiliary line electromagnetic flowmeter; 15. a heat exchanger; 16. a thermometer; 17. an electromagnetic valve; 18. an electromagnetic flow meter; 19. a pressurizing device; 20. spraying an absorption tower; 21. a spray tank; 22. a shower pipe; 23. a recovery tank; 24. an alkali liquor replenishing tank; 25. a sulfur system by Claus.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the reaction system for producing N, N' -diisopropylcarbodiimide comprises a reaction kettle 4, a jacket 10 is arranged on the outer wall of the reaction kettle 4, a plurality of flow guide rings 11 are uniformly arranged in the jacket 10, a motor 5 is arranged at the top of the reaction kettle 4, the motor 5 is connected with a stirring shaft 6 in the reaction kettle 4, the stirring shaft 6 is sequentially provided with a dispersion disc 7, two layers of rhombic stirring paddles 8 and an anchor frame type stirring rod 9 from top to bottom, the bottom of the reaction kettle 4 is connected with the upper part of the reaction kettle 4 through a circulating pump 12 and a circulating pipeline, a circulating secondary line is arranged on the circulating pipeline, a heat exchanger 15 is arranged on the circulating secondary line, and an outlet of the heat exchanger 15 is connected with the circulating pipeline; an electromagnetic flowmeter 18, an electromagnetic valve 17 and a thermometer 16 are arranged on the circulating pipeline, and an auxiliary line electromagnetic valve 13 and an auxiliary line electromagnetic flowmeter 14 are arranged on the circulating auxiliary line.
Carbon disulfide adds the feed inlet of material line 1 and reation kettle 4 and is connected, is equipped with flow control valve 2 and flowmeter 3 on the carbon disulfide adds the material line 1, and reation kettle 4's top gas vent is connected with absorbing device, absorbing device sprays absorption tower 20 including the tertiary of establishing ties, and every grade of bottom that sprays absorption tower 20 all is connected with corresponding spray tank 21, and spray tank 21 is connected with shower 22, and shower 22 is connected with the upper portion that sprays absorption tower 20, and alkali lye supplementary jar 24 is connected with spray tank 21 at different levels in proper order, and the gas vent sprays absorption tower 20 through pressure device 19 and is connected with first order, and first order spray tank 21 is connected with recovery jar 23, and the top export that sprays absorption tower 20 of last one-level is connected with claus sulphur system 25.
When the N, N '-diisopropylcarbodiimide is produced, firstly, isopropylamine and carbon disulfide are used for synthesizing N, N' -diisopropylthiourea in a solvent, the temperature is controlled below 35 ℃ through material circulation heat exchange, the reaction is carried out for 1 hour under heat preservation, hydrogen sulfide gas can be generated in the reaction process, the hydrogen sulfide gas is sprayed and reacted by alkali liquor in a three-stage spraying absorption tower to generate sodium sulfide, and the residual hydrogen sulfide gas enters a Claus sulfur production system to be effectively recovered.
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 (6)
1. A N, N' -diisopropyl carbodiimide production reaction system, which comprises a reaction kettle (4) and is characterized in that: the top of the reaction kettle (4) is provided with a motor (5), the motor (5) is connected with a stirring shaft (6) in the reaction kettle (4), the stirring shaft (6) is sequentially provided with a dispersion disc (7), a plurality of layers of stirring paddles (8) and an anchor frame type stirring rod (9) from top to bottom, the bottom of the reaction kettle (4) is connected with the upper part of the reaction kettle (4) through a circulating pump (12) and a circulating pipeline, the circulating pipeline is provided with a circulating secondary line, the circulating secondary line is provided with a heat exchanger (15), and the outlet of the heat exchanger (15) is connected with the circulating pipeline;
carbon disulfide charging line (1) is connected with reation kettle (4) feed inlet, and the top gas vent and the absorbing device of reation kettle (4) are connected, absorbing device is including multistage spray absorption tower (20) of establishing ties, and the bottom of every grade of spray absorption tower (20) all is connected with corresponding spray pond (21), and spray pond (21) are connected with shower (22), and shower (22) are connected with the upper portion of spraying absorption tower (20), and alkali lye supplyes jar (24) and are connected with spray pond (21) at different levels in proper order, and the gas vent sprays absorption tower (20) through pressure device (19) and is connected, and first order spray pond (21) are connected with recovery jar (23).
2. The N, N' -diisopropylcarbodiimide production reaction system according to claim 1, wherein: and a flow control valve (2) and a flow meter (3) are arranged on the carbon disulfide feeding line (1).
3. The N, N' -diisopropylcarbodiimide production reaction system according to claim 1, wherein: the multilayer stirring paddle (8) is at least provided with two layers, and the stirring paddle (8) is a rhombic stirring paddle.
4. The N, N' -diisopropylcarbodiimide production reaction system according to claim 1, wherein: the outer wall of the reaction kettle (4) is provided with a jacket (10), and a plurality of guide rings (11) are uniformly arranged in the jacket (10).
5. The N, N' -diisopropylcarbodiimide production reaction system according to claim 1, wherein: an electromagnetic flowmeter (18), an electromagnetic valve (17) and a thermometer (16) are arranged on the circulating pipeline, and an auxiliary line electromagnetic valve (13) and an auxiliary line electromagnetic flowmeter (14) are arranged on the circulating auxiliary line.
6. The N, N' -diisopropylcarbodiimide production reaction system according to claim 1, wherein: the top outlet of the final stage of spray absorption tower (20) is connected with a Claus sulfur system (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220540367.2U CN217368381U (en) | 2022-03-11 | 2022-03-11 | N, N' -diisopropyl carbodiimide production reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220540367.2U CN217368381U (en) | 2022-03-11 | 2022-03-11 | N, N' -diisopropyl carbodiimide production reaction system |
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| Publication Number | Publication Date |
|---|---|
| CN217368381U true CN217368381U (en) | 2022-09-06 |
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| CN202220540367.2U Active CN217368381U (en) | 2022-03-11 | 2022-03-11 | N, N' -diisopropyl carbodiimide production reaction system |
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| CN (1) | CN217368381U (en) |
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2022
- 2022-03-11 CN CN202220540367.2U patent/CN217368381U/en active Active
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: N. N '- Diisopropyl Carbodiimide production reaction system Effective date of registration: 20230628 Granted publication date: 20220906 Pledgee: Shandong Linzi Rural Commercial Bank Co.,Ltd. Pledgor: ZIBO TIANTANGSHAN CHEMICAL Co.,Ltd. Registration number: Y2023980045848 |