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Process and device for continuous rectification of bis(trichloromethyl)benzene

A technology for trichloromethyl and rectification, which is applied in the field of three-column continuous rectification methods and devices for diphenyl, can solve the problems of low product purity, low product yield, low labor efficiency, etc., and achieves stable product quality and reduced Rectification energy consumption, easy operation effect

Active Publication Date: 2015-01-07
FININGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a continuous rectification process of bis(trichloromethyl)benzene, which solves the problems of low product purity, small processing capacity, low product yield, low labor efficiency and high energy consumption in the current purification method

Method used

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  • Process and device for continuous rectification of bis(trichloromethyl)benzene

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Experimental program
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Effect test

Embodiment 1

[0035] Preparation of crude 1,3-bis(trichloromethyl)benzene: Three glass-lined reaction towers with temperature measurement, reflux condenser, LED lamp irradiation device and heating and cooling device are connected in series to form a continuous photochlorination reaction device , wherein the glass-lined reaction towers are the first tower, the second tower and the third tower in turn. After the pressure test, leak test, cleaning, drying and other preparatory stages of the reaction device, the original start-up was started, and the feeding amount was gradually increased. After the photochlorination reaction was stabilized, 1,3-bis(methyl)benzene The speed is continuously added to the first tower. The tower temperature of the first tower is controlled at 80°C~120°C by a heating or cooling device. The peak wavelength of the incident light center of the first tower is 460nm. Feed chlorine gas at a flow rate of 135kg / h for continuous chlorination reaction, control the heating or ...

Embodiment 2

[0041] Preparation of crude 1,4-bis(trichloromethyl)benzene: Three glass-lined reaction towers with temperature measurement, reflux condenser, LED lamp irradiation device and heating and cooling device are connected in series to form a continuous photochlorination reaction device , wherein the glass-lined reaction towers are the first tower, the second tower and the third tower in turn. After the reaction device has gone through the preparatory stages of pressure test, leak test, cleaning and drying, etc., the original start-up is started, and the feeding amount is gradually increased. After the photochlorination reaction is stable, 1,4-bis(methyl)benzene The speed is continuously added to the first tower. The tower temperature of the first tower is controlled at 80°C~120°C by a heating or cooling device. The peak wavelength of the incident light center of the first tower is 470nm. Feed chlorine gas at a flow rate of 140kg / h for continuous chlorination reaction, control the he...

Embodiment 3

[0047] Preparation of crude 1,3-bis(trichloromethyl)benzene: Three glass-lined reaction towers with temperature measurement, reflux condenser, LED lamp irradiation device and heating and cooling device are connected in series to form a continuous photochlorination reaction device , wherein the glass-lined reaction towers are the first tower, the second tower and the third tower in turn. After the pressure test, leak test, cleaning, drying and other preparatory stages of the reaction device, the original start-up was started, and the feeding amount was gradually increased. After the photochlorination reaction was stabilized, 1,3-bis(methyl)benzene The speed is continuously added to the first tower. The tower temperature of the first tower is controlled at 60°C~120°C by a heating or cooling device. The peak wavelength of the incident light center of the first tower is 405nm. Feed chlorine gas at a flow rate of 142kg / h for continuous chlorination reaction, control the heating or ...

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Abstract

The invention relates to a process and a device for continuous rectification of bis(trichloromethyl)benzene. According to the method, bis(trichloromethyl)benzene crude product is preheated and enters the middle part of a first tower of a three-tower rectification system, the distillate part of the first tower enters the middle part of a second tower for rectification, the tower bottoms of the first tower and the second tower enter the middle part of a third tower for further rectification, the distillate part coming out from the tower top of the third tower is condensed to obtain bis(trichloromethyl)benzene. The process for producing bis(trichloromethyl)benzene provided by the invention has the advantages of high product purity, high yield, low cost, low energy consumption and the like.

Description

[0001] technical field [0002] The invention relates to a continuous rectification method and device for bis(trichloromethyl)benzene, in particular to a three-tower continuous rectification method and device for bis(trichloromethyl)benzene. [0003] Background technique [0004] Aramid fiber is a kind of special fiber with excellent properties such as high strength, high wear resistance and high temperature resistance. Due to its good application performance, aramid fiber has very broad application prospects in many industries. The demand for aramid fiber in the global market is constantly growing. In the next few years, the global aramid fiber market will continue to grow at a high rate of about 20% per year. However, due to its technical difficulty and high investment cost, the aramid fiber market has been monopolized by a few developed countries such as the United States and Japan. The Kevlar fiber of DuPont Company of the United States and the Technora fiber of Teiji...

Claims

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Application Information

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IPC IPC(8): C07C22/04C07C17/383
Inventor 王农跃邵建明闻国强赵全忠
Owner FININGS CO LTD