Methanol, chlorine and hydrogen are mixed and catalyzed to produce methyl chloride, dichloromethane and chloroform until carbon tetrachloride. Methyl chloride can be used as raw materials for organosilicon compounds and fluorine-containing resins, and it is also an important methylation reagent, which is used to produce methyl cellulose, quaternary amine chemicals and so on. Dichloromethane is used in paint remover, aerosol, pharmaceutical raw materials and silicon wafer production. Chloroform can be used to produce HCFC-22 as refrigerant, or further processed to produce tetrafluoroethylene and other products, and can be used as an intermediate for organic solvents, extractants, dyes and drugs. Carbon tetrachloride can be used to produce F- 1 1, F- 12, etc.
Acetaldehyde and methanol were used as raw materials to react, then chlorine was introduced at 40℃, and excess chlorine was neutralized with lime milk to obtain chloroacetaldehyde dimethyl acetal.