1. Process route

    Methane chloride is produced using the methanol method and undergoes a two-step reaction: the first step is the methanol hydrochlorination reaction, in which methanol reacts with hydrogen chloride to produce chloroform; The second step is the polychlorination reaction of chloroform, which involves a series of free radical reactions between chloroform and chlorine to generate polychlorinated methane.

2. Process flow

Hydrogen chlorination unit → Thermal chlorination unit → Distillation unit → Hydrogen chloride absorption unit → Recovery and treatment unit → Carbon tetrachloride conversion unit (by-product tetrachloroethylene unit: Reaction unit → HCl absorption/chlorine gas return unit → Distillation system)

3. Technical advantages

Shandong Catech Technology Co., Ltd. has a methane chloride process package and a carbon tetrachloride conversion process package for tetrachloroethylene. Due to carbon tetrachloride and its derivatives being one of the important substances that destroy the atmospheric ozone layer, China strictly implements a licensing system for the production and use of carbon tetrachloride. Except for the raw materials used for the production of non ozone depleting substances (ODS), the excess parts are required to undergo harmless treatment. Catech Technology uses a conversion method to convert carbon tetrachloride into tetrachloroethylene, which meets the requirements of national industrial planning.

4、 Downstream direction

Chloroform is mainly used as a raw material for organic silicon, refrigerants, and the preparation of silicone polymers. It is also an important methylating agent used in the production of methyl cellulose and methyl mercaptan; It can also be used for synthesizing butyl rubber and producing methylchlorosilane; It is also used as an anesthetic in medicine.

Dichloromethane is mainly used as a raw material for adhesives, electronic and electrical industries, polyurethane foaming industries, and the production of new refrigerant HFC-32. It is also a reagent and solvent for ultra large scale integrated circuits and high-quality recording films. With the rapid development of the pharmaceutical industry that consumes dichloromethane, as well as the expiration of patent protection period and low-carbon environmental protection requirements for R410A new refrigerant products using HFC-32 as the main raw material, the demand for HFC-32 continues to increase and production capacity continues to expand. Since 2017, the continuous increase in HFC-32 prices has also driven an increase in demand for dichloromethane.

Trichloromethane is mainly used in HCFC-22 raw materials and the pharmaceutical industry, with 88% used in the production of HCFC-22 and 8% used in the pharmaceutical and pesticide industries. Due to the gradual elimination of HCFCs, trichloromethane, as a raw material, has been affected to some extent. However, as a raw material for polytetrafluoroethylene, its demand continues to grow. Overall, the consumption of trichloromethane continues to grow.

Tetrachloroethylene is mainly used as an organic solvent, dry cleaning agent, as well as a solvent for adhesives, degreasing solvents for metals, desiccants, paint removers, insect repellents, and fat extractants. It can also be used in organic synthesis.