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Catalyst for preparing vinyl chloride through coupling reaction of acetylene and dichloroethane and application thereof

A dichloroethane, coupling reaction technology, applied in molecular sieve catalysts, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve environmental pollution and other problems

Active Publication Date: 2021-05-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to one aspect of the present application, a catalyst for the coupling reaction of acetylene and ethylene dichloride to prepare vinyl chloride is provided, which solves the technical problem that the acetylene process generally uses a supported mercury chloride catalyst and causes serious environmental pollution.

Method used

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Examples

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Effect test

Embodiment approach

[0054] According to an embodiment of the present application, the catalyst for the coupling reaction of acetylene and ethylene dichloride to prepare vinyl chloride is a catalyst containing modified FAU molecular sieve as an active component.

[0055] As one of the embodiments, the ionic aqueous solution is an aqueous solution containing one or more of ammonium ions, sodium ions, calcium ions, potassium ions, lithium ions, magnesium ions, strontium ions and barium ions.

[0056] As one of the implementations, the FAU molecular sieve silicon-aluminum ratio (SiO 2 / Al 2 o 3 ) is 2 to 11.

[0057] As one of the implementations, the method for the coupled reaction of acetylene and ethylene dichloride to produce vinyl chloride includes: passing the raw material gas of acetylene and ethylene dichloride through the reactor, contacting the catalyst described in any one of the above, and The reaction temperature is 200-400°C, the volume space velocity of the mixed gas of acetylene an...

Embodiment 1

[0061] Get 10g sodium type FAU type silicon aluminum molecular sieve, the silicon aluminum ratio of FAU type molecular sieve (SiO 2 / Al 2 o 3 ) to 7.2, add 100 mL of 1 mol / L ammonium chloride aqueous solution, heat and stir in a water bath at 60°C for 4 hours, wash, filter with suction, dry in an oven at 120°C for 12 hours, repeat the above process for three consecutive exchanges, and roast at 550°C for 4 hours After several hours, the hydrogen-type FAU-type silica-alumina molecular sieve is obtained, and then a certain amount of hydrogen-type FAU-type silica-alumina molecular sieve powder is taken, extruded separately into solid particles, and the finished catalyst of 20-40 meshes is obtained after sieving.

[0062] Take 10ml of the finished hydrogen-type FAU-type silica-alumina molecular sieve catalyst, put it into a tubular fixed-bed reactor, then control the temperature of the catalyst bed at 280°C, and feed the reaction raw material gas. The ratio of the reaction raw mat...

Embodiment 2

[0065] Get 10g sodium type FAU type silicon aluminum molecular sieve, the silicon aluminum ratio of FAU type molecular sieve (SiO 2 / Al 2 o 3 ) to 2.4, add 100 mL of 1 mol / L calcium chloride aqueous solution, heat and stir in a 60°C water bath for 4 hours, wash, suction filter, and dry in a 120°C oven for 12 hours, repeat the above process for three consecutive exchanges, and roast at 550°C for 4 hours After several hours, the calcium-type FAU-type silica-alumina molecular sieve is obtained, and then a certain amount of calcium-type FAU-type silica-alumina molecular sieve powder is taken, extruded separately into solid particles, and the finished catalyst of 20-40 meshes is obtained after sieving.

[0066] Take 1ml of the finished calcium-type FAU-type silica-alumina molecular sieve catalyst, put it into a tubular fixed-bed reactor, then control the temperature of the catalyst bed at 300°C, and feed the reaction raw material gas. The ratio of the reaction raw material gas is:...

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Abstract

The invention discloses a catalyst for preparing vinyl chloride through coupling reaction of acetylene and dichloroethane. The catalyst for preparing vinyl chloride through coupling reaction of acetylene and dichloroethane comprises a modified FAU type silicon-aluminum molecular sieve, the modification is modification through ion exchange. The catalyst for preparing vinyl chloride through the coupling reaction of acetylene and dichloroethane solves the technical problem that in the prior art, a mercuric chloride loaded catalyst is generally adopted in an acetylene method process, and environmental pollution is serious.

Description

technical field [0001] The application relates to a catalyst for preparing vinyl chloride through the coupled reaction of acetylene and dichloroethane and its application, belonging to the field of catalytic synthesis. Background technique [0002] As one of the five general-purpose plastics, PVC plays an important role in national economic construction and is widely used in various industries such as automobiles, building materials, pipes, wires and cables, toys, and food packaging. In 2011, the apparent consumption of five general-purpose plastics in my country exceeded 50 million tons, of which PVC accounted for about 14 million tons. Due to the constraints of our country's resource structure, compared with the petroleum ethylene method, the traditional process of coal-calcium carbide-acetylene is more suitable for the development of the domestic PVC industry, so about 80% of PVC in my country is produced by the calcium carbide-acetylene method. At present, the key link ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J38/02C07C17/08C07C17/25C07C21/06
CPCB01J29/70B01J38/02C07C17/08C07C17/25C07C21/06Y02P20/584
Inventor 刘广业董兴宗袁丹华徐云鹏刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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