Method for producing chloroethanol and dichloroethane through ethylene glycol chlorination

A technology of ethylene dichloride and ethylene glycol, applied in chemical instruments and methods, bulk chemical production, organic chemistry, etc., can solve problems such as high production cost of ethylene oxide, difficulty in catalyst recovery, difficulty in transportation, etc., and achieve Good catalytic stability, improved selectivity and yield, good catalytic efficiency

Pending Publication Date: 2021-08-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses ethylene glycol as a raw material, and through the action of an active catalyst with cobalt compounds, manganese compounds, and iron compounds as active components, and zinc compounds as active promoters, it can effectively catalyze chloroethanol and dichloroethylene. alkane reaction to obtain a higher yield of chloroethanol, which not only solves the problems of poor selectivity and difficult recovery of organic acid catalysts in the preparation reaction of chloroethanol and dichloroethane in the prior art, but also avoids the use of ethylene oxide as the The production cost of ethylene oxide in the chloroethanol process of raw materials is high, storage and transportation are difficult, etc.

Method used

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  • Method for producing chloroethanol and dichloroethane through ethylene glycol chlorination

Examples

Experimental program
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Embodiment 1

[0030] The method for preparing chloroethanol and ethylene dichloride by chlorination of ethylene glycol described in this embodiment comprises the following steps: take 1000 kg of ethylene glycol and 5 kg of active catalyst and place them in a reactor for mixing, and control the temperature of the reaction system at 60°C, followed by 75.87Nm 3 The flow rate of / h is passed through excess HCl gas (the molar ratio of the total flow rate of HCl gas to ethylene glycol is 1.05:1) for chlorination reaction for 5h, and after the tail gas is condensed, it is absorbed by NaOH solution to remove unreacted HCl, after the reaction, the product is filtered to recover the active catalyst, washed, dried and activated for recycling.

[0031] In the method of the present embodiment, described active catalyst uses Co 2 o 3 · MnO 2 · Fe 2 o 3 As the active component, with Zn(NO 3 ) 2 It is an active auxiliary agent, and it is prepared by impregnating the surface of cordierite ceramic bal...

Embodiment 2

[0036] The method for preparing chloroethanol and ethylene dichloride by chlorination of ethylene glycol described in this embodiment comprises the following steps: take 1000 kg of ethylene glycol and 5 kg of active catalyst and place them in a reactor for mixing, and control the temperature of the reaction system at 70°C, followed by 47.42Nm 3 The flow rate of / h is passed through excess HCl gas for chlorination reaction for 8h, and the tail gas is condensed and then absorbed by 5% NaOH solution to remove unreacted HCl. After the reaction, the product is filtered to recover the active catalyst, washed and dried , After activation, it can be recycled.

[0037] In the method of the present embodiment, described active catalyst uses Co 2 o 3 · MnO 2 · Fe 2 o 3 As the active component, with Zn(NO 3 ) 2 It is an active auxiliary agent, and it is prepared by impregnating the surface of activated alumina in the form of slurry. The specific preparation steps include:

[0038]...

Embodiment 3

[0042] The method for preparing chloroethanol and ethylene dichloride by chlorination of ethylene glycol described in this example comprises the following steps: take 1000 kg of ethylene glycol and 10 kg of active catalyst and mix them in a reactor, and control the temperature of the reaction system at 80°C, followed by 63.23Nm 3 The flow rate of / h is passed through excess HCl gas for chlorination reaction for 6h, and the tail gas is condensed and then absorbed by NaOH solution to remove unreacted HCl. After the reaction, the product is filtered to recover the active catalyst, washed, dried and activated. After that, it is recycled.

[0043] In the method of the present embodiment, described active catalyst uses Co 2 o 3 · MnO 2 · Fe 2 o 3 As the active component, with Zn(NO 3 ) 2 It is an active auxiliary agent, and it is prepared by impregnating the surface of cordierite honeycomb ceramics in the form of slurry. The specific preparation steps include:

[0044] (1) T...

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Abstract

The invention relates to a method for producing chloroethanol and dichloroethane through ethylene glycol chlorination. According to the method, ethylene glycol is taken as a raw material, a cobalt compound, a manganese compound and an iron compound are taken as active components, and a zinc compound is taken as an active catalyst of an active auxiliary agent, so that the reaction of chloroethanol and dichloroethane can be effectively catalyzed, and high chloroethanol yield is obtained. The method solves the problems of poor selectivity and difficulty in organic acid catalyst recovery in the chloroethanol and dichloroethane preparation reaction in the prior art, and also avoids the problems of high ethylene oxide production cost, difficulty in storage and transportation and the like in the chloroethanol process taking ethylene oxide as a raw material.

Description

technical field [0001] The invention belongs to the technical field of compound preparation, in particular to a method for producing chloroethanol and dichloroethane by chlorination of ethylene glycol. Background technique [0002] Ethylene oxide is an important organic chemical raw material and fine chemical product, and it is also the main raw material for the preparation of polyether and carboxylic acid superplasticizers. Ethylene oxide can be used to synthesize detergents, nonionic surfactants, antifreeze agents, emulsifiers, and ethylene glycol products, and is also used to produce plasticizers, lubricants, rubber, and plastics. Widely used in many fields such as washing and dyeing, electronics, medicine, pesticides, textiles, papermaking, automobiles, oil extraction and refining, etc., and has a wide range of uses. [0003] Chloroethanol (2-chloroethanol) and dichloroethane (1,2-dichloroethane) are important organic solvents and raw materials for organic synthesis. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/16C07C19/045C07C29/62C07C31/36B01J23/889B01J27/25
CPCC07C17/16C07C29/62B01J23/002B01J23/8892B01J27/25B01J2523/00Y02P20/52
Inventor 吕建华刘继东
Owner HEBEI UNIV OF TECH
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