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Gas-liquid phase vinyl chloride production process and equipment

A production process, vinyl chloride technology, applied in the reaction of liquid and gas under the catalytic active body, the chemical method of reacting liquid and gas medium, the disproportionation separation/purification of halogenated hydrocarbons, etc., can solve the problem of carbon deposition, catalytic Low efficiency, overheating surface and other problems, to achieve the effect of improving catalytic efficiency, improving safety, and avoiding pollution

Active Publication Date: 2022-03-29
河北美邦工程科技股份有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a gas-liquid phase vinyl chloride production process and device, aiming to solve the problem of overheating phenomenon and surface area carbon caused by gas-solid reaction in the existing process, and the problem of low catalytic efficiency

Method used

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  • Gas-liquid phase vinyl chloride production process and equipment
  • Gas-liquid phase vinyl chloride production process and equipment
  • Gas-liquid phase vinyl chloride production process and equipment

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Embodiment approach

[0051] As an embodiment of the vinyl chloride production process provided by the present invention, the liquid catalyst is one of imidazole hydrochloride, nitrogen methylpyrrolidone hydrochloride, choline chloride or quaternary phosphonium salt; The active component of the liquid catalyst is one of cupric chloride, cuprous chloride, tin chloride and ruthenium trichloride.

[0052]In this embodiment, the liquid catalyst is heated to 100-120°C, and is fed into the reaction kettle 1 from the middle and lower part through the liquid catalyst pipeline until the liquid catalyst inlet 2 position; the hydrogen chloride gas and acetylene gas are dehydrated and impurity-removed and then mixed from the reaction kettle 1 The bottom is fed into the reaction kettle 1 through the mixed gas pipeline through the gas distributor 9; the liquid catalyst is a mercury-free catalyst; the molar ratio of acetylene gas to hydrogen chloride gas is 1.0-1.2:1.

[0053] In the reactor 1, under the action o...

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Abstract

The invention provides a gas-liquid phase vinyl chloride production process and device, belonging to the technical field of chemical product preparation, comprising the following steps: raw material treatment, the raw material includes a liquid catalyst and a mixed gas composed of hydrogen chloride and acetylene; acetylene hydrochlorination reaction, acetylene React with hydrogen chloride to generate vinyl chloride, and control the reaction temperature through a heat exchanger during the reaction; gas-liquid separation, the generated vinyl chloride gas flows out of the liquid catalyst, and the liquid catalyst cools and liquefies when the vinyl chloride gas passes through the condenser and flows back to The reaction zone acts on the reaction again; the liquid catalyst is recovered, and a small amount of liquid catalyst is separated again by means of a demister; the conversion rate of acetylene is detected. When the conversion rate is lower than 95%, the liquid catalyst is replaced. When the conversion rate is greater than 95%, it is used The original liquid catalyst continues to catalyze, aiming to solve the problems of overheating phenomenon, surface area carbon and low catalytic efficiency caused by gas-solid reaction in the existing process.

Description

technical field [0001] The invention belongs to the technical field of chemical product preparation, and more specifically relates to a gas-liquid phase vinyl chloride production process and device. Background technique [0002] Vinyl chloride, also known as vinyl chloride, is a kind of halogenated hydrocarbon and an important raw material in the plastics industry. It is mainly used to produce polyvinyl chloride resin (ie PVC, the world's largest general-purpose plastic); it can also be used with vinyl acetate , butadiene, acrylonitrile, acrylate, vinylidene chloride and other copolymers to manufacture adhesives, coatings, food packaging materials, building materials, etc.; it can be used as a refrigerator by taking advantage of its low boiling point; it can also be used as a dye and Extraction agent for spices. [0003] At present, the industrial synthesis methods of vinyl chloride monomer mainly include acetylene hydrochlorination and ethylene oxychlorination. In 2017, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/08C07C17/38C07C21/06B01J10/00
CPCC07C17/08C07C17/38B01J10/007C07C21/06
Inventor 高文杲王富民张旭斌刘常青王二全王海东
Owner 河北美邦工程科技股份有限公司
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