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Method for preparing 3-chloropropane through catalytic oxidation of 1, 2-dichloropropane

A technology of dichloropropane and catalytic oxidation, which is applied in the preparation of dehydrohalogenation, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve problems such as certain side effects of biological growth, toxicity of dichloropropane, environmental pollution, etc., and achieve environmental protection. The effect of obvious benefits, solving processing problems and reducing production costs

Inactive Publication Date: 2018-08-24
SHANDONG HIYI CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] 1,2-Dichloropropane is poisonous and has certain side effects on biological growth. At the same time, it causes serious environmental pollution. It has been banned in some areas of the country. There is no way to effectively use this product in large quantities at home and abroad.

Method used

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  • Method for preparing 3-chloropropane through catalytic oxidation of 1, 2-dichloropropane

Examples

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Effect test

Embodiment 1

[0029] A method for preparing 3-chloropropene by catalytic oxidation of 1,2-dichloropropane, comprising the steps of:

[0030] (1) Put the metal carbonyl catalyst in a fixed-bed reactor, pass nitrogen gas, raise the temperature to 280°C, pass through 1,2-dichloropropane, carry out dehydrochlorination reaction at 300°C, and collect the reaction product to generate 3-chloro Propylene;

[0031] The gas released by the reaction is cooled to 50°C by the cooler, and then enters the fractionation tower. The temperature is controlled at 40°C, and the unreacted chlorinated hydrocarbons are cooled and separated. Materials for hydrochloric acid;

[0032] The metal carbonyl catalyst is a mixture of supported nickel tetracarbonyl and iron pentacarbonyl; during the dehydrochlorination reaction, the space velocity of nitrogen is 500h -1 ;

[0033] (2) The reaction product is washed with water, neutralized with alkali, and washed, then sent to a propylene compressor, cooled to become a liq...

Embodiment 2

[0036] A method for preparing 3-chloropropene by catalytic oxidation of 1,2-dichloropropane, comprising the steps of:

[0037] (1) Put the metal carbonyl catalyst in a fixed-bed reactor, pass nitrogen gas, raise the temperature to 320°C, pass through 1,2-dichloropropane, carry out dehydrochlorination reaction at 400°C, and collect the reaction product to generate 3-chloro Propylene;

[0038] The gas released by the reaction is cooled to 60°C by the cooler, and then enters the fractionation tower. The temperature is controlled at 50°C, and the unreacted chlorinated hydrocarbons are cooled and separated. The hydrogen chloride in the gas is washed and refined with water to obtain 35% hydrogen Materials for hydrochloric acid;

[0039] The metal carbonyl catalyst is a mixture of supported manganese decacarbonyl and cobalt octacarbonyl; during the dehydrochlorination reaction, the space velocity of nitrogen is 2000h -1 ;

[0040] (2) The reaction product is washed with water, neu...

Embodiment 3

[0043] A method for preparing 3-chloropropene by catalytic oxidation of 1,2-dichloropropane, comprising the steps of:

[0044](1) Put the metal carbonyl catalyst in a fixed-bed reactor, pass nitrogen gas, raise the temperature to 300°C, pass through 1,2-dichloropropane, carry out dehydrochlorination reaction at 350°C, collect the reaction product to generate 3-chloro Propylene;

[0045] The gas released by the reaction is cooled to 55°C by the cooler, and then enters the fractionation tower. The temperature is controlled at 45°C, and the unreacted chlorinated hydrocarbons are cooled and separated. Materials for hydrochloric acid;

[0046] The metal carbonyl catalyst is supported chromium hexacarbonyl; during the dehydrochlorination reaction, the space velocity of nitrogen is 1200h -1 ;

[0047] (2) The reaction product is washed with water, neutralized with alkali, and washed, then sent to a propylene compressor, cooled to become a liquid, and then cooled to below 10°C by a...

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Abstract

The invention relates to the field of chemical synthesis, and particularly discloses a method for preparing 3-chloropropane through catalytic oxidation of 1, 2-dichloropropane. The method is characterized by including: putting a metal carbonyl catalyst into a fixed bed reactor, feeding nitrogen, rising temperature, feeding 1, 2-dichloropropane for reaction, and collecting a reaction product to generate 3-chloropropane; subjecting the reaction product to water washing, alkali neutralizing and washing, feeding the reaction product into a propylene compressor, cooling to form liquid, enabling theliquid to pass a cooler, drying through a propylene drying tower, and performing fractional distillation and rectification to obtain a heavy component which is 3-chloropropane. By the method, a routeis found for large-scale application of 1, 2-dichloropropane which is an industrial byproduct, production cost of 3-chloropropane is lowered, economic benefit of enterprises can be increased, the treatment problem of toxic industrial byproducts can be solved, and environment protection benefit is obvious.

Description

(1) Technical field [0001] The invention relates to the field of chemical synthesis, in particular to a method for preparing 3-chloropropene by catalytic oxidation of 1,2-dichloropropane. (2) Background technology [0002] 1,2-Dichloropropane is poisonous and has certain side effects on biological growth. At the same time, it causes serious environmental pollution. It has been banned in some parts of the country. There is no way to effectively use this product in large quantities at home and abroad. [0003] 3-Chloropropene is an important intermediate of organic raw materials. Its main application is the production of epichlorohydrin, and it is also used in the production of allyl alcohol, glycerin, allylamine, acrylic ester, etc. It is also widely used in synthetic resins, pesticides, Coatings, adhesives, lubricants and other fine chemical products. [0004] The industrial production technology of propene chlorination to produce allyl chloride was first invented by the Am...

Claims

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Application Information

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IPC IPC(8): C07C17/25C07C17/38C07C17/383C07C17/389C07C21/067
CPCC07C17/25C07C17/38C07C17/383C07C17/389C07C21/067
Inventor 宋鹏斌张建肖薄纯金张昭利张延军
Owner SHANDONG HIYI CHEM TECH
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