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A kind of method for preparing vinyl chloride by low-temperature acetylene hydrochlorination

A technology of acetylene hydrochlorination and vinyl chloride, applied in chemical instruments and methods, hydrogen halide addition preparation, organic chemistry, etc., can solve the problems of catalyst carbon deposition, deactivation, environmental pollution, etc., and achieve less by-products and longer life. Long, low catalyst cost effect

Active Publication Date: 2022-07-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to solve the problem of environmental pollution caused by the use of highly toxic mercury catalysts in the production of polyvinyl chloride by the calcium carbide acetylene method; Inactivation problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 6.66g CuCl 2 ·2H 2 O was dissolved in 11.55 g of deionized water to make a solution, 1.05 mL of chloroauric acid aqueous solution (an aqueous solution containing 0.00478 g of gold per mL) was added, and 10 g of 5% HNO was added. 3 Treated coconut shell activated carbon. The activated carbon was allowed to completely absorb the above solution, and it was allowed to stand at room temperature for 10 hours, and then dried at 100° C. to obtain a finished product of a mass percent 0.05% Au-25% Cu / AC catalyst.

[0034] Get 10mL of the above-mentioned catalyst finished product, load it into a tubular fixed-bed reactor, then control the catalyst bed temperature at 75 ° C, feed the reaction raw material gas, and the composition ratio of this reaction raw material gas is: hydrogen chloride / acetylene (molar ratio) = 1.2, the volumetric space velocity of the reaction feed gas acetylene (that is, the ratio of the flow rate of acetylene to the volume of the catalyst) = 30h -1 , and...

Embodiment 2

[0036] 6.66g CuCl 2 ·2H 2O was dissolved in 11.55 g of deionized water to make a solution, 1.05 mL of chloroauric acid aqueous solution (an aqueous solution containing 0.00478 g of gold per mL) was added, and 10 g of 5% HNO was added. 3 Treated wood activated carbon. The activated carbon was allowed to completely absorb the above solution, and it was allowed to stand at room temperature for 10 hours, and then dried at 100° C. to obtain a finished product of a mass percent 0.05% Au-25% Cu / AC catalyst.

[0037] Get 1mL of the above-mentioned catalyst finished product, load it into the tubular fixed-bed reactor, then control the catalyst bed temperature at 100 ° C, feed the reaction raw material gas, and the composition ratio of this reaction raw material gas is: hydrogen chloride / acetylene (molar ratio) = 2.0, the volumetric space velocity of the reaction feed gas acetylene = 300h -1 , and the reaction product was analyzed by gas chromatography. The results were: acetylene c...

Embodiment 3

[0039] 6.66g CuCl 2 ·2H 2 O was dissolved in 11.55 g of deionized water to make a solution, 1.05 mL of chloroauric acid aqueous solution (an aqueous solution containing 0.00478 g of gold per mL) was added, and 10 g of 5% HNO was added. 3 Treated coal-based activated carbon. The activated carbon was allowed to completely absorb the above solution, and it was allowed to stand at room temperature for 10 hours, and then dried at 100° C. to obtain a finished product of a mass percent 0.05% Au-25% Cu / AC catalyst.

[0040] Get 1mL of the above-mentioned catalyst finished product, load it into a tubular fixed-bed reactor, then control the catalyst bed temperature at 75 ° C, feed the reaction raw material gas, and the composition ratio of this reaction raw material gas is: hydrogen chloride / acetylene (molar ratio) = 1.1, the volumetric space velocity of the reaction feed gas acetylene = 600h -1 , and the reaction product was analyzed by gas chromatography. The results were as follo...

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Abstract

The present application relates to a method for preparing vinyl chloride by hydrochlorination of acetylene at low temperature. The method is to generate vinyl chloride by passing acetylene and hydrogen chloride feed gas through a fixed bed reactor under the condition of lower than 100°C. The used catalyst includes an activated carbon carrier and an active component, the active component is a mixture of chloroauric acid and soluble copper salt, wherein the weight percentage of gold element and carrier is 0.01 to 0.1%, and the weight percentage of copper element and carrier is 20% ~100%. The reaction temperature of the method of the invention is low; the carbon deposition of the catalyst during the operation process can be effectively controlled, thereby helping to prolong the life of the catalyst, and at the same time, the energy consumption of the reaction process and the generation amount of by-products can be reduced. The method of the invention is suitable for the process of preparing vinyl chloride monomer by the calcium carbide acetylene method, and has good industrial application prospect.

Description

technical field [0001] The application relates to a method for preparing vinyl chloride by acetylene hydrochlorination, and belongs to the technical field of vinyl chloride monomer preparation. Background technique [0002] As one of the five general-purpose plastics, PVC plays an important role in the national economic construction and is widely used in various industries such as automobiles, building materials, pipes, wires and cables, toys and food packaging. Acetylene method (acetylene hydrochlorination method), ethylene method and ethane method are the main methods for synthesizing vinyl chloride monomer in industry. my country's basic national conditions of "more coal, less gas, and less oil" determine that the acetylene method has become the mainstream process for synthesizing vinyl chloride monomer in my country. At present, the catalyst used in the industrial acetylene method is activated carbon loaded with mercury chloride, and the reaction temperature is 100-200 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/08C07C21/06B01J27/122B01J27/25
CPCC07C17/08B01J27/122B01J27/25C07C21/06Y02P20/584
Inventor 刘广业宋智甲徐云鹏刘中民庞晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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