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Copper-based catalyst with high activity and stability for acetylene hydrochlorination

A copper-based catalyst, acetylene hydrochlorination technology, applied in physical/chemical process catalysts, organic chemistry, hydrogen halide addition preparation, etc., can solve the problem of unsatisfactory catalyst stability and achieve sufficient development potential and thermal stability Good, low vapor pressure effect

Active Publication Date: 2017-08-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The most common problem in the current research on copper-based acetylene hydrochlorination catalysts is that the stability of the catalyst is not ideal.

Method used

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  • Copper-based catalyst with high activity and stability for acetylene hydrochlorination
  • Copper-based catalyst with high activity and stability for acetylene hydrochlorination
  • Copper-based catalyst with high activity and stability for acetylene hydrochlorination

Examples

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Effect test

Embodiment 1

[0024] Coconut shell carbon is used as the carrier, copper chloride dihydrate and trimethylbenzylammonium chloride are used to prepare the catalyst, so that the mass fraction of copper in the catalyst is 5%, and the mass fraction of trimethylbenzylammonium chloride is 2.5 %. The reaction was carried out under the above reaction conditions, and the initial conversion rate of the catalyst and the reduction value of the conversion rate after 12 hours were recorded in Table 1. The change curve of the catalyst conversion rate with the reaction time is shown in Table 1. figure 1 .

Embodiment 2

[0028] Using coconut shell carbon as a carrier, copper phosphate and trimethylbenzylammonium chloride are used to prepare the catalyst, so that the mass fraction of copper in the catalyst is 5%, and the mass fraction of trimethylbenzylammonium chloride is 2.5%. The reaction was carried out under the above reaction conditions, and the initial conversion rate of the catalyst and the reduction value of the conversion rate after 12 hours were recorded in Table 1. The change curve of the catalyst conversion rate with the reaction time is shown in Table 1. figure 1 .

Embodiment 3

[0032] Using wood carbon as a carrier, the catalyst was prepared using copper chloride dihydrate and trimethylbenzylammonium chloride, so that the mass fraction of copper in the catalyst was 5%, and the mass fraction of trimethylbenzylammonium chloride was 2.5% . The reaction was carried out under the above reaction conditions, and the initial conversion rate of the catalyst and the reduction value of the conversion rate after 12 hours were recorded in Table 2.

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Abstract

The invention relates to a copper-based catalyst with high activity and stability for acetylene hydrochlorination. According to the copper-based catalyst, a copper salt is taken as an active component, wherein the copper salt is selected from one or more of copper chloride, copper nitrate, copper sulfate and copper phosphate. The copper-based catalyst is characterized in that a stabilizer is introduced into the copper-based catalyst; and the stabilizer is selected from one or more of guanidine hydrochloride, tetramethylethylenediamine hydrochloride, tetramethylammonium chloride, tetraethylammonium chloride, benzyltrimethylammonium chloride, benzyl triethyl ammonium chloride, tetramethyl phosphorus chloride, tetrabutyl phosphorus chloride, methyl triphenyl phosphorus chloride and 1-butyl triphenylphosphonium. Through introducing the stabilizer has the advantages of being low in cost, low in toxicity, good in heat stability and small steam pressure into the catalyst, and the stability of the copper-based catalyst for acetylene hydrochlorination is significantly improved.

Description

Technical field [0001] The invention belongs to the technical field of preparing vinyl chloride by the hydrochlorination of acetylene, and particularly relates to a copper-based catalyst for the hydrochlorination of acetylene with high activity and stability. Background technique [0002] China is the world's largest producer of poly vinyl chloride (PVC), accounting for more than 50% of the world's total production capacity. There are two main industrial routes for the production of vinyl chloride monomer (VCM), namely the petroleum-ethylene method and the coal-acetylene method. In China, the acetylene process (also known as the calcium carbide process) industrial route has abundant coal resources, high atomic economy and cost advantages. Therefore, in the production of PVC in China, the process of acetylene hydrochlorination to synthesize vinyl chloride accounts for more than 70% The proportion is still increasing year by year. The core reaction is: [0003] [0004] In industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/122B01J27/18C07C17/08C07C21/06
CPCB01J27/122B01J27/1817C07C17/08C07C21/06
Inventor 罗国华徐浩
Owner TSINGHUA UNIV
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