Activating and recovering method of waste mercuric chloride catalyst

A recovery method and technology of mercuric chloride are applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of reducing production costs, being conducive to environmental protection, and improving production efficiency

Active Publication Date: 2014-11-12
贵州省万山银河化工有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem that the prior art cannot economically process and recycle the waste mercuric chloride catalyst

Method used

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  • Activating and recovering method of waste mercuric chloride catalyst

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] figure 1 It is the flow chart of the first embodiment of the waste mercuric chloride catalyst activation recovery method of the present invention, as figure 1 Shown, the waste mercuric chloride catalyst activation recovery method of the present embodiment can comprise the following steps:

[0025] Low-temperature carbonization step 101, wherein the spent mercuric chlori...

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Abstract

An activating and recovering method of a waste mercuric chloride catalyst is provided. The method includes: a low-temperature carbonization step, namely a step of adding the waste mercuric chloride catalyst into an activation regeneration furnace and heating to 100-200 DEG C; a step of steam activation, namely a step of feeding an activating gas into the activation regeneration furnace so as to clean micropore surfaces of the waste mercuric chloride catalyst; a step of solvent activation, namely a step of activating the waste mercuric chloride catalyst again by using a regenerating solvent so as to remove a trace amount of impurities in the waste mercuric chloride catalyst; and a step of regenerating the mercuric chloride catalyst, namely a step of dipping the waste mercuric chloride catalyst with a mercuric chloride solution. The method can effectively recover and reutilize the waste mercuric chloride catalyst. Compared with the prior art, the method is advantageous in that: on the one hand, the waste mercuric chloride catalyst is free of innocent treatment, and on the other hand, the waste mercuric chloride catalyst can be reutilized, thus effectively reducing the production cost, increasing the production efficiency and facilitating environment protection.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a catalyst activation recovery method for waste mercuric chloride. Background technique [0002] At present, polyvinyl chloride is generally prepared by the acetylene method in the industry, and in the process of preparing polyvinyl chloride by the acetylene method, mercury chloride (HgCl 2 ) as a catalyst for the reaction, namely mercuric chloride catalyst. [0003] Since acetylene gas, the reactant in the acetylene process, generally contains impurities such as hydrogen sulfide, phosphine, and moisture, after the mercury chloride catalyst is used for a period of time, the sulfur and phosphorus compounds contained in the acetylene gas will react with mercury chloride , generating non-catalytically active substances such as mercury sulfide, which has no catalytic activity. The interaction between the trace moisture contained in the acetylene gas and the mercuric chlor...

Claims

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Application Information

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IPC IPC(8): B01J27/32B01J27/138
Inventor 廖军民
Owner 贵州省万山银河化工有限责任公司
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