High-stability composite mercury catalyst for hydrochlorination of acetylene

A technology of high acetylene hydrochlorination and acetylene hydrochlorination, which is applied in physical/chemical process catalysts, organic chemistry, hydrogen halide addition preparation, etc., can solve the problems of large mercury consumption, low catalytic efficiency, environmental pollution, etc. Achieve the effect of reducing mercury consumption, improving catalytic activity and reducing production costs

Inactive Publication Date: 2011-06-08
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low catalytic efficiency of the current mercuric chloride catalyst, high mercury content, excessive consumption of mercury in production, and serious environmental

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-activity composite mercury catalyst for acetylene hydrochlorination, comprising the following components: 100 parts of activated carbon carrier, 1 part of main catalytic component mercuric chloride, 1 part of auxiliary component, which is cobalt chloride; the bulk density of the carrier is 0.5 g / cm 3 , specific surface area 500m 2 / g; the main catalytic component and the auxiliary component are configured into an aqueous solution with a pH≤1; the immersion temperature is about 80°C, and the time is about 8 hours; the temperature during drying is about 100°C, so that the water content is 0.5%; In the gas phase reaction of hydrogen chloride to vinyl chloride, the reaction temperature is 120°C, and the molar ratio of hydrogen chloride to acetylene is 1.05:1.

Embodiment 2

[0020] A high-activity composite mercury catalyst for acetylene hydrochlorination, comprising the following components: 100 parts of activated carbon carrier, 8 parts of main catalytic component mercury chloride, 3 parts of auxiliary component, the auxiliary component is manganese chloride; the bulk density of the carrier is 0.45 g / cm 3 , specific surface area 800m 2 / g; the main catalytic component and the auxiliary component are configured into an aqueous solution with a pH≤1; the immersion temperature is about 80°C, and the time is about 8 hours; the temperature during drying is about 100°C, so that the water content is 0.5%; In the gas phase reaction of hydrogen chloride to vinyl chloride, the reaction temperature is 120°C, and the molar ratio of hydrogen chloride to acetylene is 1.05:1.

Embodiment 3

[0022] A high-activity composite mercury catalyst for acetylene hydrochlorination, comprising the following components: 100 parts of activated carbon carrier, 2 parts of main catalytic component mercury chloride, 1 part of auxiliary component, the auxiliary component is cadmium chloride; the bulk density of the carrier is 0.45 g / cm 3 , specific surface area 800m 2 / g; the main catalytic component and the auxiliary component are configured into an aqueous solution with a pH≤1; the immersion temperature is about 80°C, and the time is about 8 hours; the temperature during drying is about 100°C, so that the water content is 0.5%; In the gas phase reaction of hydrogen chloride to vinyl chloride, the reaction temperature is 120°C, and the molar ratio of hydrogen chloride to acetylene is 1.05:1.

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PUM

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Abstract

The invention discloses a high-stability composite mercury catalyst for hydrochlorination of acetylene. The catalyst comprises the following components: 100 parts of active carbon serving as a carrier, 1-15 parts of mercuric chloride serving as a main catalytic component and 1-10 parts of auxiliary component, wherein the auxiliary component is one of chlorides of cobalt, manganese and gadolinium or a mixture of multiple of the chlorides, or one of chlorides of bismuth, cadmium and copper or a mixture of multiple of the chlorides. According to the invention, the problems of the current mercuric chloride catalyst that the mercury consumption during production is excessively large and the environmental pollution is serious are solved. The activity of the composite mercury catalyst disclosed by the invention is improved by 5-50% compared with that of the pure mercuric chloride catalyst, the utilization efficiency of the catalyst can be effectively improved, the production cost is lowered, and the mercury pollution is reduced.

Description

technical field [0001] The invention relates to a catalyst, in particular to an acetylene hydrochlorination composite mercury catalyst with higher catalytic activity in polyvinyl chloride production. Background technique [0002] Polyvinyl chloride is one of the most widely used general-purpose plastics in the world. Vinyl chloride monomer is an important raw material for organic chemical synthesis, and its main purpose is to produce polyvinyl chloride resin and other vinyl chloride copolymers. Due to the different levels of economic development, the production of vinyl chloride abroad mainly adopts the ethylene method to produce vinyl chloride, while the domestic method is dominated by the calcium carbide acetylene method. So far, the traditional simple mercury chloride (HgCl 2 ) solid phase catalyst. Traditional mercuric chloride catalysts have the disadvantages of low catalytic activity and easy loss of active components. In order to ensure catalytic activity and achi...

Claims

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Application Information

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IPC IPC(8): B01J27/138C07C17/08C07C21/06
Inventor 李国栋夏锐庞晓东王小昌张学鲁张传彩王小艳陈万银李静张磊恺峰李朝阳
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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