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A copper-based catalyst for the synthesis of vinyl chloride by acetylene hydrochlorination and its preparation method and application

A technology for the synthesis of vinyl chloride and copper-based catalysts by hydrochlorination of acetylene, which is applied in the direction of hydrogen halide addition preparation, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc. Problems such as poor stability and easy loss of active components of the catalyst can achieve the effects of reducing hazardous waste emissions, reducing waste acid, and improving catalytic activity and stability.

Active Publication Date: 2021-04-23
ZHONGKE YIGONG XIAMEN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because the substituents of H on the amide solvent amino group that this invention adopts are all alkane substituents, the catalyst that makes has the following two problems: (1) when the substituents are small molecule hydrocarbon groups, although the catalyst obtained is active High, but due to the low boiling point and high vapor pressure, the active components of the catalyst are easy to lose, and the stability of the catalyst is relatively poor; (2) when the substituent is a macromolecular hydrocarbon group, the active components of the catalyst have a high boiling point and are not easy to lose, and the stability is good, but less active
Therefore, the overall performance of the mercury-free catalyst prepared by the application number 201710174566.X technology still has some gaps compared with the mercury catalyst, and there is still room for further improvement

Method used

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  • A copper-based catalyst for the synthesis of vinyl chloride by acetylene hydrochlorination and its preparation method and application
  • A copper-based catalyst for the synthesis of vinyl chloride by acetylene hydrochlorination and its preparation method and application
  • A copper-based catalyst for the synthesis of vinyl chloride by acetylene hydrochlorination and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Weigh 68.6g CuCl 2 2H 2 O and 18.6g R is CH 2 CH 2 OH (oxygen-containing polar groups are alcohol groups), dissolved in 67.5g deionized water, to obtain an impregnation solution containing copper chloride and pyrrolidone compounds;

[0051] (2) The specific surface area is 700 ~ 1500m 2 / g, the carbon tetrachloride adsorption value is 50~70%, the ash value is less than 6%. The granular activated carbon after pickling is soaked in the above-mentioned prepared solution at room temperature, and the control soaking temperature is room temperature, the volume of solution and activated carbon The ratio is 1.5:1, soak until the concentration of copper chloride in the solution is constant;

[0052] (3) Filter the soaked activated carbon, dry it, and dry it at 120°C to obtain the required catalyst A1;

[0053] (4) put C 2 h 2 Mixed gas with HCl (C 2 h 2 The molar ratio of HCl and HCl is 1:1.05) into the tube reactor equipped with catalyst A1 for hydrochlorination ...

Embodiment 2

[0055] (1) Weigh 152.2g CuCl 2 2H 2 O and 40g R is CH 2 COCH 3 (The oxygen-containing polar group is a ketone group), dissolved in 207.8g of deionized water, to obtain an impregnation solution containing copper chloride and pyrrolidone compound;

[0056] (2) The specific surface area is 700 ~ 1500m 2 / g, the carbon tetrachloride adsorption value is 50~70%, and the granular activated carbon after the ash content is less than 6% is soaked in the above-mentioned prepared solution at room temperature, and the control soaking temperature is 70 ℃, the solution and activated carbon The volume ratio is 2:1, soak until the concentration of copper chloride in the solution is constant;

[0057] (3) Filter the soaked activated carbon, dry it, and dry it at 120°C to obtain the required catalyst A2;

[0058] (4) put C 2 h 2 Mixed gas with HCl (C 2 h 2 The molar ratio of HCl and HCl is 1:1) into the tube reactor equipped with catalyst A2 for hydrochlorination reaction, the reactio...

Embodiment 3

[0060] (1) Weigh 101.5g CuCl 2 2H 2 O and 4g R is CH 2 CH 2 OCOCH 3 (The oxygen-containing polar group is an ester group), dissolved in 94.5g deionized water, to obtain an impregnation solution containing copper chloride and pyrrolidone compound;

[0061] (2) The specific surface area is 700 ~ 1500m 2 / g, the adsorption value of carbon tetrachloride is 50-70%, and the ash value is less than 6%. The granular activated carbon after pickling is soaked in the above-mentioned prepared solution at room temperature, and the soaking temperature is controlled to be 50°C. The volume ratio is 1:1, soak until the concentration of copper chloride in the solution is constant;

[0062] (3) filter the soaked activated carbon, dry it, and dry it at 150°C to obtain the required catalyst A3;

[0063] (4) put C 2 h 2 Mixed gas with HCl (C 2 h 2 The molar ratio of HCl and HCl is 1:1) into the tube reactor equipped with catalyst A3 for hydrochlorination reaction, the reaction temperatur...

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Abstract

The invention relates to a copper-based catalyst for acetylene hydrochlorination to synthesize vinyl chloride and its preparation method and application. The preparation method comprises the following steps: 1) dissolving copper salt and a compound of formula I in water to prepare a mixed solution; 2) adding activated carbon into the mixed solution obtained in step 1) for impregnation; 3) filtering the activated carbon obtained in step 2), draining and heating and drying to obtain the copper-based catalyst. The copper-based catalyst of the present invention is used in the hydrochlorination of acetylene to synthesize vinyl chloride. It is operated according to the current industrial strength. The single-pass conversion rate of acetylene is above 98%, the selectivity of vinyl chloride is above 99%, and the service life can reach more than 8000 hours. It can be directly and simply It replaces the mercury catalyst in the existing calcium carbide process and satisfies industrial applications.

Description

technical field [0001] The invention belongs to the field of chemical catalysis, and in particular relates to a copper-based catalyst for acetylene hydrochlorination to synthesize vinyl chloride, a preparation method and application thereof. Background technique [0002] Vinyl chloride monomer is the basic raw material for the synthesis of various chemical products. Its main use is to produce polyvinyl chloride, which is mainly produced by the calcium carbide acetylene method and the petroleum ethylene method. China's coal-rich, oil-poor, and gas-poor energy reserves determine that the calcium carbide acetylene method will continue to be the main process for the production of vinyl chloride in my country for a long time to come, that is, mercuric chloride catalyzes the reaction of acetylene and hydrogen chloride to produce vinyl chloride. However, the highly toxic mercuric chloride catalyst seriously pollutes the environment and endangers human health. Therefore, the develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C17/08C07C21/06
CPCB01J31/2213B01J2231/32B01J2531/16C07C17/08C07C21/06
Inventor 钟劲光刘星刘瑞艳
Owner ZHONGKE YIGONG XIAMEN CHEM TECH
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