A kind of mercury-free polyvinyl chloride production process

A polyvinyl chloride, production process technology, applied in catalysts, organic chemistry, hydrogenation hydrocarbon production, etc., can solve environmental pollution and other problems, and achieve the effect of solving mercury pollution

Active Publication Date: 2021-03-09
QINGHAI SALT LAKE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a mercury-free polyvinyl chloride production process, which is used to solve the problem of serious environmental pollution caused by the use of mercury-containing catalysts in the existing polyvinyl chloride production process

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  • A kind of mercury-free polyvinyl chloride production process

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Embodiment Construction

[0043] The present invention provides many applicable inventive concepts that can be embodied in numerous specific contexts. The specific examples described in the following embodiments of the present invention are only used as illustrations of specific embodiments of the present invention, and are not intended to limit the scope of the present invention.

[0044] The present invention will be further described below in combination with specific embodiments.

[0045] The invention provides a mercury-free polyvinyl chloride production process. Acetylene, hydrogen and chlorine are used as raw materials, and polyvinyl chloride is prepared through S1 addition process, S2 chlorination process, S3 catalytic reforming process and S4 polymerization process.

[0046] Above-mentioned raw material acetylene is made by calcium carbide process, and this calcium carbide process comprises:

[0047] A1 Preparation of crude acetylene gas: Calcium carbide enters the acetylene generator and dec...

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Abstract

The invention discloses a production process of mercury-free polyvinyl chloride, which sequentially includes the S1 addition process: the raw material acetylene and the raw material hydrogen are mixed in the catalyst Pd / Al 2 o 3 Under the action of the addition reaction, ethylene is generated; S2 chlorination process: the ethylene prepared in S1 is chlorinated with the raw material chlorine in a high-low temperature chlorination reactor to generate dichloroethane; S3 catalytic reforming Process: Catalytic reforming reaction of ethylene dichloride and raw material acetylene in step S2 under the action of catalyst barium chloride to generate vinyl chloride monomer; S4 polymerization process: polymerize vinyl chloride monomer in step S3 Produces polyvinyl chloride products. The process of preparing polyvinyl chloride in the present invention abandons the traditional method of preparing polyvinyl chloride by calcium carbide method, and does not need to use mercury element in the whole process, solves the problem of mercury pollution in the process of preparing polyvinyl chloride, and makes the whole production process more efficient Cleaner and more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride production technology, in particular to a mercury-free polyvinyl chloride production technology. Background technique [0002] In recent years, the prevention and control of mercury pollution has attracted more and more attention. The Minamata Convention on Mercury promulgated by the United Nations Environment Program requires that mercury-containing thermometers, sphygmomanometers and fluorescent lamps and other mercury-containing products be withdrawn from the market by 2020 or meet the specified mercury-containing standards. At the same time, phase out production processes that add mercury within a time limit, and greatly reduce the amount of mercury used in mercury-containing production processes, such as mercury-containing polyvinyl chloride manufacturing processes. [0003] There are currently two production processes for polyvinyl chloride in China, the calcium carbide method an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C07C5/09C07C11/04C07C17/02C07C19/045C07C17/00C07C17/35C07C21/06
CPCC07C5/09C07C17/00C07C17/02C07C17/35C07C2523/44C08F114/06C07C11/04C07C19/045C07C21/06
Inventor 康金福李月仙李广伍张志勇王晓敏赵纯良王生孝李有财马吉荣史国月
Owner QINGHAI SALT LAKE IND
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