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A gas-liquid phase catalytic reaction system and its application method

A catalytic reaction, gas-liquid phase technology, applied in chemical methods, chemical instruments and methods, organic chemistry and other directions for the reaction of liquids and gaseous media, which can solve the problem of easy loss of catalysts to pollute the environment, hidden safety hazards of material leakage, and inconvenient replacement reactions. equipment and other problems, to achieve the effect of high raw material conversion efficiency, good equipment stability and good control effect

Active Publication Date: 2021-12-24
河北美邦工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the existing gas-liquid phase reaction in the process of generating gas products, the catalyst is easy to lose and pollute the environment, easy to deactivate, inconvenient to replace, and the reactor has potential safety hazards of material leakage, difficult temperature control, easy scaling, high energy consumption, and low reaction efficiency. Problem, the present invention provides a gas-liquid phase catalytic reaction system and its use method

Method used

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  • A gas-liquid phase catalytic reaction system and its application method
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  • A gas-liquid phase catalytic reaction system and its application method

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Effect test

Embodiment 1

[0071] In the process of preparing vinyl chloride by using the gas-liquid phase catalytic reaction system of the present invention according to the above method, take 1 cubic meter of ionic liquid catalyst and add it to the bubble column, the reaction temperature is 160 ° C, and the volume space velocity of acetylene is 120 h -1 , the volume space velocity of hydrogen chloride is 1.15 times that of acetylene, and vinyl chloride is prepared; wherein the ionic liquid catalyst is imidazole hydrochloride containing copper chloride, and the concentration of copper chloride in the ionic liquid catalyst is 0.01mol / L.

[0072] After testing, the conversion rate of acetylene in the raw material is 97.5%, and the selectivity of vinyl chloride is 99.5%.

Embodiment 2

[0074] In the process of preparing vinyl chloride by using the gas-liquid phase catalytic reaction system of the present invention according to the above-mentioned method, take 1 cubic meter of ionic liquid catalyst and add it to the bubble column, the reaction temperature is 150°C, and the volumetric space velocity of acetylene is 80h -1 , the volume space velocity that hydrogen chloride feeds is 1.2 times of acetylene, and vinyl chloride is prepared; Wherein the ionic liquid catalyst is the nitrogen methyl pyrrolidone hydrochloride containing cuprous chloride, and the concentration of cuprous chloride in the ionic liquid catalyst is 0.02 mol / L.

[0075] After testing, the conversion rate of acetylene in the raw material is 97.8%, and the selectivity of vinyl chloride is 99.7%.

Embodiment 3

[0077] In the process of preparing vinyl chloride by using the gas-liquid phase catalytic reaction system of the present invention according to the above method, take 1 cubic meter of ionic liquid catalyst and add it to the bubble column, the reaction temperature is 150°C, and the volumetric space velocity of acetylene is 40h -1 , the volume space velocity of hydrogen chloride is the same as that of acetylene, and vinyl chloride is prepared; wherein the ionic liquid catalyst is choline chloride containing tin chloride, and the concentration of tin chloride in the ionic liquid catalyst is 0.03mol / L.

[0078] After testing, the conversion rate of acetylene in the raw material is 98%, and the selectivity of vinyl chloride is 99.3%.

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Abstract

The invention relates to the field of chemical industry, and specifically discloses a gas-liquid phase catalytic reaction system and a method for using the same. The gas-liquid phase catalytic reaction system includes a reaction device, a condensation device and a catalyst circulation device, wherein the catalyst circulation device includes Refill port for fresh catalyst and waste port for draining spent catalyst. When the gas-liquid phase catalytic reaction system of the present invention is used for gas-liquid phase reaction, if the catalyst activity decreases, part of the catalyst can be discharged through the waste liquid port, and then new catalyst can be replenished through the liquid replenishment port, so that the catalyst in the reactor can be realized without stopping The automatic replacement and continuous and stable production of products under certain circumstances improve the production efficiency of the equipment.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a gas-liquid phase catalytic reaction system and its application method. Background technique [0002] Polyvinyl chloride (PVC), the third most widely produced polymer after polyethylene and polypropylene, has a wide range of applications in the building and construction industry, as well as in the packaging, electrical and clothing industries. Vinyl chloride is a widely used chemical raw material. It is mainly used to manufacture polyvinyl chloride homopolymers and copolymers. It is an important raw material in the plastics industry. It can also be used as organic synthesis raw materials, extractants, refrigerants, etc. [0003] At present, the industrial synthesis methods of vinyl chloride monomer mainly include acetylene hydrochlorination and ethylene oxychlorination. Among them, the acetylene hydrochlorination method produces vinyl chloride through the gas-solid phase reactio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J10/00C07C17/08C07C21/06
CPCB01J10/00C07C17/08C07C21/06
Inventor 孙明帅高文杲王富民张旭斌刘常青
Owner 河北美邦工程科技股份有限公司
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