Environmental-friendly mercuric chloride metal catalyst and preparation method thereof

A metal catalyst and mercuric chloride technology, applied in physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of cumbersome catalyst preparation process, cumbersome catalyst preparation, and low catalytic efficiency, and achieve It is beneficial to control production, the catalyst releases smoothly, and is easy for industrial production

Inactive Publication Date: 2011-08-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the catalytic activity and HgCl 2 There is still a gap in the catalyst, and the preparation of the catalyst is cumbersome, and the existing device needs to be modified before it can be put into use. There are technical defects such as low catalytic efficiency, cumbersome catalyst preparation process, and increased equipment costs.

Method used

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  • Environmental-friendly mercuric chloride metal catalyst and preparation method thereof
  • Environmental-friendly mercuric chloride metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 30g of styrene-acrylic acid copolymer (weight-average molecular weight Mw=11300, molecular weight distribution MWD=1.31, glass temperature of 125°C, melting point of 215°C) was added to 300ml of tetrahydrofuran (THF) and stirred to make styrene-acrylic acid The copolymer is completely dissolved to obtain a polymer solution;

[0030] (2) Add 30g of HgCl adsorbed by activated carbon 2 Catalyst (wherein Hg weight percent content is 13.1%, SEM picture is as figure 1 ) into the polymer solution, mixed uniformly to form a slurry-like catalyst;

[0031] (3) Evaporate 4000ml of normal hexane at 66°C, and completely pass it into the slurry-like catalyst prepared in step (2) of the stirring state in the form of gas phase normal hexane (the addition rate of normal hexane is 1ml / min), and then stop Stir, precipitate the solid matter, extract the suspended liquid, and wash the precipitated solid matter with n-hexane for 3 times to obtain an environment-friendly mercuric chlori...

Embodiment 2

[0034] (1) Add 3g of styrene-acrylic acid copolymer (weight average molecular weight Mw=11300, molecular weight distribution MWD=1.31, glass temperature is 125°C, melting point is 215°C) into 300ml tetrahydrofuran (THF) and stir to make styrene-acrylic acid The copolymer is completely dissolved to obtain a polymer solution;

[0035] (2) Add 30g of HgCl adsorbed by activated carbon 2 Catalyst (wherein Hg weight percent content is 13.1%) in polymer solution, mixes and forms slurry-like catalyst;

[0036] (3) Evaporate 4000ml of normal hexane at 66°C, and completely pass it into the slurry-like catalyst prepared in step (2) of the stirring state in the form of gas phase normal hexane (the addition rate of normal hexane is 1ml / min), and then stop Stir, precipitate the solid matter, extract the suspended liquid, and wash the precipitated solid matter with n-hexane for 3 times to obtain an environment-friendly mercuric chloride metal catalyst, totaling 32.7 g.

[0037] (4) 32.5g o...

Embodiment 3

[0039] (1) Add 300g of styrene-acrylic acid copolymer (weight-average molecular weight Mw=11300, molecular weight distribution MWD=1.31, glass temperature of 125°C, melting point of 215°C) into 500ml of tetrahydrofuran (THF) and stir to make styrene-acrylic acid The copolymer is completely dissolved to obtain a polymer solution;

[0040] (2) Add 30g of HgCl adsorbed by activated carbon 2 Catalyst (wherein Hg weight percent content is 13.1%) in polymer solution, mixes and forms slurry-like catalyst;

[0041] (3) Evaporate 4000ml of normal hexane at 66°C, and completely pass it into the slurry-like catalyst prepared in step (2) of the stirring state in the form of gas phase normal hexane (the addition rate of normal hexane is 1ml / min), and then stop Stir, precipitate the solid matter, draw out the suspended liquid, and wash the precipitated solid matter with n-hexane for 3 times to obtain an environment-friendly mercuric chloride metal catalyst, totaling 328.5 g.

[0042] (4) ...

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Abstract

The invention discloses an environmental-friendly mercuric chloride metal catalyst, which consists of an inhomogeneous mercuric chloride metal catalyst and a polymer coated on the surface of the inhomogeneous mercuric chloride metal catalyst in a film mode. In a reaction of producing vinyl chloride by acetylene hydrochlorination, due to the adoption of the catalyst, on the premise of ensuring the activity of the catalyst and the selectivity of vinyl chloride, the environment and health problems caused by Hg sublimation are reduced. The catalyst has the characteristics of high catalyzing efficiency, low toxicity, mild catalyst release and the like. The invention also discloses a preparation method of the environmental-friendly mercuric chloride metal catalyst. In the preparing process, few parameters need to be controlled. The preparation method has high repeatability and strong controllability and is easy for industrial production.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an environment-friendly mercuric chloride (HgCl 2 ) metal catalyst and preparation method thereof. Background technique [0002] Vinyl chloride is an important raw material for organic synthesis, and its main use is to produce polyvinyl chloride (PVC). In my country, the output and sales volume of vinyl chloride rank among the top in the world. At present, the industrial production methods of vinyl chloride mainly include ethylene method and acetylene method. Among them, the acetylene process is simple, but because mercuric chloride is used as a catalyst in the process, mercuric chloride has high toxicity, poor stability, and is easy to sublime (at 136.2°C, the vapor pressure of mercuric chloride is 133Pa), which will affect workers. It will also cause environmental pollution, which has been basically eliminated abroad. In my country, due to the scarcity of ethylene resources, the ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C07C21/06C07C17/08
Inventor 阳永荣历伟王靖岱蒋斌波黄正梁张擎蒋云涛何乐路王丹红
Owner ZHEJIANG UNIV
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