How Is Methylene Chloride Produced?

Dichloromethane is typically produced through the reaction of chloroform and methanol:

Formation of Chloromethane: Methanol (CH3OH) reacts with hydrogen chloride (HCl).

Result: Chloromethane (CH3Cl) and water (H2O) are produced.

Reaction: CH3OH + HCl → CH3Cl + H2O

Synthesis of Dichloromethane: Chloromethane reacts with chloroform.

Result: Dichloromethane (CH2Cl2) and hydrogen chloride (HCl) are produced as byproducts.

Reaction: CH3Cl + Cl2 → CH2Cl2 + HCl

Purification: The resulting mixture is evaporated.

Pure dichloromethane can be obtained through methods such as distillation.

Recycling: The released HCl gas is recycled.

Methanol is recovered and reused.