Zhejiang University

Zhejiang Juhua Technology Center Co., Ltd

Zhejiang Juhua New Material Research Institute Co., Ltd.

Hongfeng Li

Qi Jiang

Zhiguo Zhang

Yang Lv

Liyang Zhou

Jinming Wang

Liyong Ma

Shuhua Wang

Wenjun Zhang

Wei Qin

Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE). The method includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K.

Method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene

The invention provides a continuous preparation method of 2,3,3,3-tetrafluoropropene, comprising the following steps: carrying out liquid-phase catalytic telomerization reaction on ethylene and carbon tetrachloride serving as initial raw materials in the presence of a composite catalyst to obtain a reaction product; performing two-stage membrane separation and purification on the reaction product, and then sequentially performing a primary high-temperature cracking reaction, a gas-phase chlorination reaction, a secondary high-temperature cracking reaction, a primary gas-phase catalytic fluorination reaction and a secondary gas-phase catalytic fluorination reaction to obtain a reaction product; condensing and rectifying the secondary gas-phase catalytic fluorination reaction product to obtain the 2,3,3,3-tetrafluoropropene product.

Continuous preparation method of 2,3,3,3-tetrafluoropropene

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Zhejiang, China

Hongfeng Li