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Reaction and rectification device and method for producing isopropanolamine

A technology of isopropanolamine and reactive distillation, applied in separation methods, chemical instruments and methods, fractional distillation, etc., can solve the problems of low efficiency, cumbersome process steps of isopropanolamine, high energy consumption, etc., and achieve reduction of total investment, The reaction process is stable and controllable, and the effect of reducing production energy consumption

Active Publication Date: 2016-02-03
ZHEJIANG JINGGONG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of cumbersome process steps, low efficiency and high energy consumption in the batch production of isopropanolamine in the prior art, and provides a production continuity, which can reduce production energy consumption, reduce total investment and operating costs , Reactive distillation device for the production of isopropanolamine to improve production efficiency

Method used

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  • Reaction and rectification device and method for producing isopropanolamine

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Embodiment 1

[0024] Such as figure 1 A reactive distillation device for producing isopropanolamine is shown, the reactive distillation device includes a reactive distillation tower 1, a condenser 2 and a reboiler 3, and the reactive distillation tower is divided into a rectification section 4 from top to bottom , the reaction section 5 and the stripping section 6, the top of the reactive distillation column is provided with a water inlet pipe 7 and a condenser feed pipe 8, and the condenser feed pipe is connected with the condenser inlet, and the condenser outlet is connected with the rectification section. The distillate reflux pipe 11 and the tower top product discharge pipe 12, the upper part of the reaction section is provided with an ammonia feed pipe 9, the middle part of the reaction section is provided with a propylene oxide feed pipe 10, and the bottom of the reactive distillation tower passes through the connecting pipe 13 is connected with the inlet of the reboiler, the top of t...

Embodiment 2

[0027] The reaction rectification device of producing isopropanolamine in the present embodiment and embodiment 1 figure 1 Exactly the same, the difference lies in the process parameters in the method for producing isopropanolamine, specifically: ammonia water, propylene oxide are charged according to the ratio that the molar ratio of ammonia to propylene oxide is 1, and the feeding of ammonia water and propylene oxide is controlled. The material temperature is 250°C; the temperature at the top of the reaction distillation tower is controlled at 50°C, the temperature of the reaction section is 300°C, the temperature at the bottom of the reaction distillation tower is 200°C, and the operating pressure of the entire column of the reaction distillation tower is 50 bar; The molar ratio of internal ammonia to propylene oxide was 30.

Embodiment 3

[0029] The reaction rectification device of producing isopropanolamine in the present embodiment and embodiment 1 figure 1 Exactly the same, the difference lies in the process parameters in the method for producing isopropanolamine, specifically: ammonia water, propylene oxide are charged according to the ratio that the molar ratio of ammonia to propylene oxide is 1.1, and the feeding of ammonia water and propylene oxide is controlled. The material temperature is 300°C; the temperature at the top of the reactive distillation tower is controlled to be 101°C, the temperature of the reaction section is 350°C, the temperature at the bottom of the reactive distillation tower is 240°C, and the operating pressure of the entire column of the reactive distillation tower is 100 bar; The molar ratio of internal ammonia to propylene oxide was 300.

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Abstract

The invention discloses a reaction and rectification device and a reaction and rectification method for producing isopropanolamine. In the condition that water is used as a catalyst, ammonia and epoxypropane are used as raw materials to be put into a reaction and rectification tower for reaction, heavy components after the reaction are purified by a stripping section, light components after the reaction are purified by a rectifying section and then enter a condenser to be condensed, a part of distillate in the condenser flows back to the reaction and rectification tower again through a distillate return pipe, and the other part of distillate is discharged out of the tower through a top product discharge pipe and is collected as products; materials at the bottom of the tower enter a reboiler for being heated through a communicating pipe, a part of the materials at the bottom of the tower is discharged out of the tower through a bottom product discharge pipe and is collected as an isopropanolamine mixture, and the other part of the materials at the bottom of the tower flow back to the top of the reaction and rectification tower through a reboiled material circulating return pipe. By using the reaction and rectification device and the reaction and rectification method, the total energy consumption of deamination and dehydration can be reduced, side reactions and by-products are effectively avoided, and the product purity is increased.

Description

technical field [0001] The invention relates to the technical field of isopropanolamine production, in particular to a reactive distillation device and method for producing isopropanolamine. Background technique [0002] Isopropanolamine is a value-added chemical with important uses as a final product or intermediate in many industries such as pharmaceuticals, chemicals, and petrochemicals. Isopropanolamine is mainly produced by the reaction of propylene oxide and ammonia, and the reactants are usually a mixture of three derivatives of isopropanolamine. [0003] At present, most domestic manufacturers adopt the batch method of production, using the ammonia water production process, passing propylene oxide into the batch reactor, and reacting with about 25% low-concentration ammonia water, after the reaction in the batch reactor, and then through rectification tower for purification. The production of isopropanolamine by batch method has cumbersome process steps, low effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/00B01D3/14C07C215/08C07C213/04C07C213/10
Inventor 李波徐开兵陈伟宫有圣朱烨俊
Owner ZHEJIANG JINGGONG NEW MATERIAL TECH
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