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Continuous chlorination reaction device and method for producing trichloroacetaldehyde

A technology of trichloroacetaldehyde and chlorination reaction, applied in chemical instruments and methods, organic chemistry, preparation of carbon-based compounds, etc., can solve the problems of few reaction stages, low yield of trichloroethanol, difficult production process, and the like, Achieve the effect of reducing the consumption of raw materials, the requirements of the device structure and the requirements of the reaction conditions are simple, and the utilization rate is improved

Pending Publication Date: 2021-04-09
安道麦股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] In order to solve the problem that the reaction stages described in the background technology are less and the yield of trichloroethanol is lower and the production process is not easy to industrialize, the present invention provides a continuous chlorination reaction device and method for producing trichloroacetaldehyde

Method used

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  • Continuous chlorination reaction device and method for producing trichloroacetaldehyde

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Experimental program
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Effect test

Embodiment 1

[0042] Equipment used: 1# to 9# chlorination reactors are all 2m 3 , 1# to 8# condensers are all 20m 2 , tail chlorine absorber 20m 2 , Tail chlorine absorption pump 1.6m 3 / h, Chloral crude product storage tank 5000L.

[0043] 95% ethanol (700kg / h) enters from 1# chlorination reactor, controls the reaction temperature at 40-50°C, continuously overflows from top to bottom to 2# chlorination reactor, controls the reaction temperature at 50-60°C, and overflows To 3# chlorination reactor, control the reaction temperature 60-70°C, overflow to 4# chlorination reactor, control the reaction temperature 70-80°C, overflow to 5# chlorination reactor, control the reaction temperature 80-85 ℃, overflow to 6# chlorination reactor, control the reaction temperature 85-90 ℃, overflow to 7# chlorination reactor, control the reaction temperature 90-95 ℃, overflow to 8# chlorination reactor, control the reaction The temperature is 95-100°C, overflow to 9# chlorination reactor, control the re...

Embodiment 2

[0048] Equipment used: 1# to 9# chlorination reactors are all 2m 3 , 1# to 8# condensers are all 20m 2 , tail chlorine absorber 20m 2 , Tail chlorine absorption pump 1.6m 3 / h, Chloral crude product storage tank 5000L.

[0049] 95% ethanol (700kg / h) enters from 1# chlorination reactor, controls the reaction temperature at 40-50°C, continuously overflows from top to bottom to 2# chlorination reactor, controls the reaction temperature at 50-60°C, and overflows To 3# chlorination reactor, control the reaction temperature 60-70°C, overflow to 4# chlorination reactor, control the reaction temperature 70-80°C, overflow to 5# chlorination reactor, control the reaction temperature 80-85 ℃, overflow to 6# chlorination reactor, control the reaction temperature 85-90 ℃, overflow to 7# chlorination reactor, control the reaction temperature 90-95 ℃, overflow to 8# chlorination reactor, control the reaction The temperature is 95-100°C, overflow to 9# chlorination reactor, control the re...

Embodiment 3

[0054] Equipment used: 1# to 9# chlorination reactors are all 2m 3 , 1# to 8# condensers are all 20m 2 , tail chlorine absorber 20m 2 , Tail chlorine absorption pump 1.6m 3 / h, Chloral crude product storage tank 5000L.

[0055] 95% ethanol (600kg / h) enters from the 1# anti-chlorination reactor, controls the reaction temperature at 40-50°C, continuously overflows from top to bottom to the 2# chlorination reactor, controls the reaction temperature at 50-60°C, and overflows Flow to 3# chlorination reactor, control reaction temperature 60-70°C, overflow to 4# chlorination reactor, control reaction temperature 70-80°C, overflow to 5# chlorination reactor, control reaction temperature 80- 85°C, overflow to 6# chlorination reactor, control the reaction temperature 85-90°C, overflow to 7# chlorination reactor, control the reaction temperature 90-95°C, overflow to 8# chlorination reactor, control The reaction temperature is 95-100°C, overflow to 9# chlorination reactor, control the...

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Abstract

The invention provides a continuous chlorination reaction device and method for producing trichloroacetaldehyde, and the provided continuous chlorination reaction device specifically comprises chlorination reactors 1 #-9 #, condensers 1 #-8 # matched with the chlorination reactors 1 #-9 #, a tail chlorine absorber, a tail chlorine absorption pump, a trichloroacetaldehyde crude product storage tank and a hydrogen chloride tail gas absorption system which are connected in sequence through pipelines, and the four-step nine-stage continuous chlorination reaction device is formed. When the device is used for producing trichloroacetaldehyde, reactant ethanol is added from the 1 # chlorination reactor in the top layer and continuously flows into the chlorination reactor from top to bottom; the reactant chlorine is continuously introduced into chlorination reactors 7 # to 9 # at the bottom layer from bottom to top according to a proper proportion and are subjected to countercurrent contact reaction with ethanol in the chlorination reactors, and water vapor participates in the reaction process. The reaction device disclosed by the invention can reduce the requirement on the height of a plant, is simple in structure and reaction condition, and is easy to realize industrialization; and the provided production method optimizes the kinetic control of the reaction process, and improves the reaction rate and the reaction yield.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and relates to a reaction device and a process method for producing trichloroacetaldehyde. Background technique [0002] Chloral is a basic chemical intermediate raw material with a wide range of uses. It can be used as a pesticide intermediate to produce dichlorvos, trichlorfon, chloral urea, sodium trichloroacetate, etc.; it can be used as a pharmaceutical intermediate to produce chlorine Mycin, aureomycin, chloral hydrate, chloral dextrose, chloral amine, chloral hydroxylamine, etc.; can also be used to produce organic raw materials, such as dimethylformamide, chloroform, trichloro Acetic acid etc. [0003] Chloral production process routes include ethanol chlorination and acetaldehyde chlorination. In foreign countries, the catalytic chlorination of acetaldehyde is the main route, and the yield of chloral is about 70-80%. In China, ethanol is generally used as a raw material, an...

Claims

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Application Information

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IPC IPC(8): C07C45/51C07C47/16
CPCC07C45/512C07C47/16
Inventor 刘志明艾秋红薛光才范文涛张彬彬周用义刘孝平王童
Owner 安道麦股份有限公司
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