Chloroacetic acid production method and chlorination reactor

A chlorination reactor and production method technology, applied in chemical/physical/physical chemistry fixed reactors, chemical instruments and methods, organic chemistry, etc. problems, to achieve the effect of shortening the reaction residence time, reducing consumption and reducing side reactions

Active Publication Date: 2015-03-04
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the original chlorination method is kept unchanged and the chlorination reactor is enlarged, there are several problems: on the one hand, the reactor increases, and the uneven distribution of liquid chlorine and acetic anhydride in acetic acid increases, which reduces the reaction rate and increases side reactions; on the other hand, the reactor increases, the heat of reaction increases, and the traditional jacketed reactor cannot transfer the heat generated by the reaction in a timely and effective manner; in addition, with the increase in the geometric size of the reactor, the requirements for equipment manufacturing strength increase

Method used

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  • Chloroacetic acid production method and chlorination reactor

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Effect test

Embodiment 1

[0027] A production method and reactor for chloroacetic acid.

[0028] The volume of the chlorination reactor is 1m 3 , there are 4 inverted triangular baffles on the inner wall, and the volume of the supergravity bucket is 0.2m 3 , add acetic acid in the chlorination reactor, add the acetic anhydride that is equivalent to 5% of acetic acid quality, add liquid chlorine quality and be 1.4 times of acetic acid quality, maintain reaction temperature to be 180 ℃, reaction pressure is 6bar, chlorination reaction process is in 500g gravity It is completed in the field, and after the reaction is completed, the product is separated and purified according to the continuous production process, and 99.3% of the chloroacetic acid product is obtained. The unit volume processing capacity of the reactor is 3.2 times that of the existing reactor.

Embodiment 2

[0030] A production method and reactor for chloroacetic acid.

[0031] The volume of the chlorination reactor is 1m 3 , there are 6 inverted triangular baffles on the inner wall, and the volume of the supergravity bucket is 0.3m 3 , add acetic acid in the chlorination reactor, add the acetic anhydride that is equivalent to 6.5% of acetic acid quality, add liquid chlorine quality and be 1.3 times of acetic acid quality, maintain reaction temperature to be 200 ℃, reaction pressure is 8bar, chlorination reaction process is in 800g gravity It is completed in the field, and after the reaction is completed, the product is separated and purified according to the continuous production process, and 99.4% of the chloroacetic acid product is obtained. The unit volume processing capacity of the reactor is 4.5 times that of the existing reactor.

Embodiment 3

[0033] A production method and reactor for chloroacetic acid.

[0034] Chlorination reactor volume is 2m 3 , there are 8 inverted triangular baffles on the inner wall, and the volume of the supergravity bucket is 0.3m 3 , add acetic acid in the chlorination reactor, add the acetic anhydride that is equivalent to 6% of acetic acid quality, add liquid chlorine quality and be 1.8 times of acetic acid quality, maintain reaction temperature to be 230 ℃, reaction pressure is 5bar, chlorination reaction process is in 700g gravity It is completed in the field, and after the reaction is completed, the product is separated and purified according to the continuous production process, and 99.0% of the chloroacetic acid product is obtained. The unit volume processing capacity of the reactor is 4.7 times that of the existing reactor.

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Abstract

The invention provides a chloroacetic acid production method and a chlorination reactor. The chloroacetic acid production method comprises the following steps: primarily mixing acetic acid, liquid chlorine and acetic anhydride according to a ratio, feeding a mixture obtained from the former step into the chlorination reactor, keeping a certain reaction temperature and a certain reaction pressure, completing chlorination reaction in a gravity field of 100-1000g, and performing separation purification on the product by using a continuous method production process after the reaction is completed, thereby obtaining a product finally. The chlorination reactor mainly comprises a reaction kettle, a cooling half-tube, a supergravity bucket, a driving motor and a mixer. By adopting the chloroacetic acid production method and the chlorination reactor provided by the invention, the macroscopic and microcosmic distribution of components in a reaction system can be improved, the side effect is reduced, the internal mass transfer velocity of the liquid phase is reduced, the separation of the gas phase and the liquid phase is improved, the chlorination reaction velocity is increased, the reaction retention time is shortened, the heat radiation effect is improved, and the treatment capacity is much higher than that of a conventional method, and the chloroacetic acid production method is particularly applicable to a large-size chloroacetic acid device.

Description

technical field [0001] The invention belongs to the technical field of chloroacetic acid production, in particular to a method for producing chloroacetic acid under the action of supergravity and a chlorination reactor. Background technique [0002] Chloroacetic acid is an important organic chemical raw material, mainly used to produce carboxymethyl cellulose, glycine, ethyl chloroacetate, etc. As an active compound, it is widely used in herbicides, medicines, dyes, oilfield chemicals, paper chemicals, plastic stabilizers, textile auxiliaries, surfactants, electroplating, fragrances, flavors and other fields. [0003] At present, the main method of industrial production of chloroacetic acid is acetic acid catalytic chlorination method, which can be divided into continuous method and batch method according to different processes. Compared with batch chlorination, the continuous method has the advantages of large scale equipment, advanced production technology, high product q...

Claims

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Application Information

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IPC IPC(8): C07C53/16C07C51/363B01J19/18
CPCB01J19/18B01J2208/00796B01J2219/00002C07C51/363C07C53/16
Inventor 孙顺平赵兵张猛张进治陈涛姜正良董庆涛董强李超张树晨侯振耿尧辰
Owner CHINA TIANCHEN ENG
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