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Device and process for continuously producing chloroacetic acid by differential circle flow

A chloroacetic acid, differential technology, applied in chlorine/hydrogen chloride, carboxylic acid anhydride preparation, halogen/halogen acid and other directions, can solve the problems of large investment, environmental pollution, high production cost, save the absorption device, "reduce escape, production Efficient effect

Pending Publication Date: 2019-01-04
杭州众立化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a device and process for continuous production of chloroacetic acid, to solve the technical problems of large investment, high production cost and environmental pollution of the above-mentioned equipment

Method used

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  • Device and process for continuously producing chloroacetic acid by differential circle flow
  • Device and process for continuously producing chloroacetic acid by differential circle flow
  • Device and process for continuously producing chloroacetic acid by differential circle flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Step 1: The chlorinated liquid in the separator 4 is discharged from the separator liquid outlet 403 and pressurized by the circulation pump 2 and enters the gas-liquid mixing chamber 107 from the main reactor liquid inlet 104 at the bottom of the main reactor 1, and the chlorine gas is discharged from the main reactor The gas inlet 103 enters the gas-liquid mixing chamber 107. After mixing, it enters the main reactor tube side 108 for chemical reaction. The reaction temperature is 80°C and the reaction pressure is 80KPa. The reacted mixed liquid passes through the main reactor outlet 105 and the separator After the mixed liquid inlet 401, it flows back to the separator 4 for gas-liquid separation;

[0053] Step 2: After the separated hydrogen chloride gas is discharged from the separator gas outlet 402, it enters the prereactor mixing chamber 310 through the prereactor gas inlet 305, and the chlorinated liquid in the separator 4 enters the main reactor 1 again through t...

Embodiment 2

[0061] Step 1: The chlorinated liquid in the separator 4 is discharged from the separator liquid outlet 403 and pressurized by the circulation pump 2 and enters the gas-liquid mixing chamber 107 from the main reactor liquid inlet 104 at the bottom of the main reactor 1, and the chlorine gas is discharged from the main reactor The gas inlet 103 enters the gas-liquid mixing chamber 107. After mixing, it enters the main reactor tube side 108 for chemical reaction. The reaction temperature is 105°C and the reaction pressure is 250KPa. The reacted mixed liquid passes through the main reactor outlet 105 and the separator After the mixed liquid inlet 401, it flows back to the separator 4 for gas-liquid separation;

[0062] Step 2: After the separated hydrogen chloride gas is discharged from the separator gas outlet 402, it enters the prereactor mixing chamber 310 through the prereactor gas inlet 305, and the chlorinated liquid in the separator 4 enters the main reactor 1 again through...

Embodiment 3

[0070] Step 1: The chlorinated liquid in the separator 4 is discharged from the separator liquid outlet 403 and pressurized by the circulation pump 2 and enters the gas-liquid mixing chamber 107 from the main reactor liquid inlet 104 at the bottom of the main reactor 1, and the chlorine gas is discharged from the main reactor The gas inlet 103 enters the gas-liquid mixing chamber 107. After mixing, it enters the main reactor tube side 108 for chemical reaction. The reaction temperature is 90°C and the reaction pressure is 170KPa. The reacted mixed liquid passes through the main reactor outlet 105 and the separator After the mixed liquid inlet 401, it flows back to the separator 4 for gas-liquid separation;

[0071] Step 2: After the separated hydrogen chloride gas is discharged from the separator gas outlet 402, it enters the prereactor mixing chamber 310 through the prereactor gas inlet 305, and the chlorinated liquid in the separator 4 enters the main reactor 1 again through ...

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Abstract

The invention provides a device and process for continuously producing chloroacetic acid by differential circle flow. The device comprises a main reactor, a pre-reactor, a separator, a circulating pump, a primary condenser, a secondary condenser, a demister, a discharge pump, pipelines and automatic control instruments, wherein both the main reactor and the pre-reactor are a tubular micro-channelreaction heat exchanger; a plurality of micro-channels are arranged in the main reactor; the main reactor is provided with a plurality of longitudinal main-reactor tube passes and a plurality of transverse main-reactor shell passes; the main-reactor shell passes are connected with a main-reactor cooling water inlet and a main-reactor cooling water outlet respectively arranged on two sides of the main reactor; and a gas-liquid mixing chamber is arranged at the bottom of the main reactor. Compared with the traditional technology, the device and process have the following advantages: a hydrodechlorination device and an auxiliary hydrogen chloride absorption device are saved, the equipment investment cost is reduced, generated polychlorinated compounds in the chlorination liquid are reduced bythe differential circle flow process and the production efficiency and quality of chloroacetic acid are improved.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a device and process for continuously producing chloroacetic acid with differential circulation. Background technique [0002] Chloroacetic acid is an important raw material and intermediate in organic synthesis, and occupies a prominent position in chlorine products and acetic acid derivatives. Chloroacetic acid contains two important functional groups -Cl and -COOH. After Cl is replaced by F, Br, I, NH2, CN, SH, OH and other groups, various chemical products can be formed, which can be widely used in medicine, dyeing and finishing, Pesticide, paper making, oil field and other industries. [0003] There are many ways to synthesize chloroacetic acid, but in large-scale industrialization, it is mainly acetic acid chlorination catalytic method. According to different catalysts, it can be divided into sulfur catalysis and acetic anhydride catalysis. [0004] The sulfur-catal...

Claims

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Application Information

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IPC IPC(8): C07C51/083C07C53/16C01B7/07
CPCC01B7/0706C07C51/083C07C53/16
Inventor 邱振中汪美贞汪振华
Owner 杭州众立化工科技有限公司
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