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Hg-Ni catalyst used in synthesis of chloroethylene by using hydrochlorination of acetylene and preparation method for Hg-Ni catalyst

A technology for the production of vinyl chloride and catalysts by chlorination, which is applied in the direction of hydrogen halide addition preparation, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problem of immature development of mercury-free catalysts, no industrialization reports, and catalyst mercury content Advanced problems, to achieve the effect of easy operation, high strength and less by-products

Inactive Publication Date: 2013-01-16
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  • Claims
  • Application Information

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Problems solved by technology

my country mainly produces polyvinyl chloride by the calcium carbide acetylene method. The catalyst used in the production process has a high mercury content, and the lost mercury has caused serious environmental pollution. On the other hand, mercury resources are scarce, and my country has also proposed restrictions on the amount of mercury catalysts. Now we will face the situation of "no mercury available, no mercury"
[0003] The development of mercury-free catalysts is the best way to solve this problem, but the development of mercury-free catalysts is immature now, and no industrialization reports have been seen so far

Method used

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  • Hg-Ni catalyst used in synthesis of chloroethylene by using hydrochlorination of acetylene and preparation method for Hg-Ni catalyst
  • Hg-Ni catalyst used in synthesis of chloroethylene by using hydrochlorination of acetylene and preparation method for Hg-Ni catalyst

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Embodiment 1

[0016] Example 1: The catalyst for the production of vinyl chloride by hydrochlorination of acetylene in this embodiment includes an inert carrier and two metal salts, wherein HgCl 2 The content of the catalyst accounts for 3% to 5% of the weight of the catalyst, and the molar ratio of Ni to Hg is 1 to 5; the active component is loaded on a porous carrier, and the porous carrier uses pitch-based, coal-based or fruit shell activated carbon. The preparation method of the catalyst for the production of vinyl chloride by acetylene hydrochlorination is as follows: 1. the metered HgCl 2 Prepare solution with dilute hydrochloric acid, final HgCl 2 The content is 3% to 5% of the weight of the catalyst; ②Immerse the inert carrier in the prepared solution, and immerse it in a constant temperature water bath at 80°C for more than 10 hours; ③Heat it on the water bath until the liquid is basically evaporated, and then put it in Dried in oven, obtains Hg catalyst; ④ nickel chloride is weig...

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Abstract

The invention relates to a low-mercury catalyst used in preparation of chloroethylene by hydrochlorination reaction of acetylene. The low-mercury catalyst is prepared from mercuric chloride serving as an active ingredient and the other metal element, namely nickel chloride, wherein metal salts of the active ingredient can be nitrate, acetate, chloride and the like; the active ingredient is loaded by a porous carrier, and an asphaltic base, a coal base or husk active carbon serves as the porous carrier; and the active ingredient is loaded by an impregnation method.

Description

technical field [0001] The invention relates to a method for preparing a low-mercury catalyst for synthesizing vinyl chloride by utilizing acetylene. Background technique [0002] With the sustained and rapid development of the national economy, the demand for polyvinyl chloride is increasing. my country mainly produces polyvinyl chloride by the calcium carbide acetylene method. The catalyst used in the production process has a high mercury content, and the lost mercury has caused serious environmental pollution. On the other hand, mercury resources are scarce, and my country has also proposed restrictions on the amount of mercury catalysts. Now we will be faced with the situation of "no mercury available, no mercury". [0003] The development of mercury-free catalysts is the best way to solve this problem, but the development of mercury-free catalysts is immature, and no industrialization reports have been seen so far. The invention relates to a novel low-mercury catalyst....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J35/10C07C21/06C07C17/08
Inventor 代斌徐龙龙王绪根张海洋谢东阳
Owner 代斌
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