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A copper-based catalyst for acetylene hydrochlorination with high activity and stability

A copper-based catalyst, acetylene hydrochlorination technology, applied in the direction of physical/chemical process catalysts, organic chemistry, chemical instruments and methods, etc., can solve the problems of unsatisfactory catalyst stability, achieve sufficient development potential, small vapor pressure, The effect of stability improvement

Active Publication Date: 2020-04-07
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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  • A copper-based catalyst for acetylene hydrochlorination with high activity and stability
  • A copper-based catalyst for acetylene hydrochlorination with high activity and stability
  • A copper-based catalyst for acetylene hydrochlorination with high activity and stability

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Using coconut shell carbon as a carrier, copper chloride dihydrate and trimethylbenzyl ammonium chloride are used to prepare the catalyst, so that the mass fraction of copper in the catalyst is 5%, and the mass fraction of trimethyl benzyl ammonium chloride is 2.5% %. Under above-mentioned reaction condition, carry out reaction, the initial conversion rate of catalyst and 12 hours later conversion rate descending value data are entered into table 1, and catalyst conversion rate changes curve with reaction time see figure 1 .

Embodiment 2

[0028] Coconut shell carbon was used as a carrier, copper phosphate and trimethyl benzyl ammonium chloride were used to prepare the catalyst, so that the mass fraction of copper in the catalyst was 5%, and the mass fraction of trimethyl benzyl ammonium chloride was 2.5%. Under above-mentioned reaction condition, carry out reaction, the initial conversion rate of catalyst and 12 hours later conversion rate descending value data are entered into table 1, and catalyst conversion rate changes curve with reaction time see figure 1 .

Embodiment 3

[0032] Using woody carbon as a carrier, copper chloride dihydrate and trimethylbenzyl ammonium chloride are used to prepare the catalyst, so that the mass fraction of copper in the catalyst is 5%, and the mass fraction of trimethyl benzyl ammonium chloride is 2.5% . The reaction was carried out under the above reaction conditions, and the data of the initial conversion rate of the catalyst and the decrease in 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 hydrochlorination of acetylene, and in particular relates to a copper-based catalyst for acetylene hydrochlorination with high activity and stability. Background technique [0002] China is the world's largest producer of polyvinyl 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 petroleum-ethylene method and coal-acetylene method. In China, the industrial route of the acetylene method (also known as the calcium carbide method) has abundant coal resources, high atom economy and cost advantages. Therefore, in the production of PVC in China, the acetylene method hydrochlorination synthesis of vinyl chloride accounts for more than 70%. proportion and is still increasing year by year. The core reactions are: [0003] [0004] In the industrial ...

Claims

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Application Information

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Patent Type & Authority Patents(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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