Dichloromethane has the advantages of strong dissolving ability and low toxicity, it is widely used in the manufacture of safe film film, polycarbonate, and the rest as paint solvent, metal degreasing agent, aerosol spray agent, polyurethane foaming agent, mold release agent and paint removal agent.

Dichloromethane, a colorless liquid, is used as a reaction medium in the pharmaceutical industry to prepare ampicillin, oxypicillin and avanamycin. It is also used as solvent for film production, solvent for petroleum dewaxing, aerosol propellant, extraction agent for organic synthesis, foaming agent for polyurethane and metal cleaning agent for foam plastics production.

Dichloromethane is mainly used in film production and medicine in China. Among them, the consumption of film production accounts for 50% of the total consumption, the consumption of medicine accounts for 20% of the total consumption, the consumption of cleaning agent and chemical industry accounts for 20% of the total consumption, and other aspects account for 10%. Dichloromethane is also used as a refrigerant carrier in industrial refrigeration systems, but it is very harmful, producing highly toxic phosphogas when in contact with open or hot objects. Moisture in the air can hydrolyze to form a trace of hydrogen chloride, light can also promote hydrolysis and increase the corrosion of metals.

Used for grain fumigation and refrigeration of low pressure freezers and air conditioning units. It is used as an auxiliary foaming agent in the production of polyether urane foam plastics and as a foaming agent for extruding polysulfone foam plastics. [4]

Methylene chloride is also used to make decaffeinated coffee. Coffee is first boiled to dissolve the caffeine and float it on the surface, then dichloromethane is used to remove the caffeine.

Application

Used in medicine, sponge foaming, adhesives, flame retardants, solvents, fine chemicals and other industries

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