Removal of hydrogen fluoride from mixture of hydrogen fluoride and dichlorofluoromethane.

摘要

Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride and dichlorofluoromethane by cooling the mixture to a temperature of 70 DEG C or lower to separate the mixture to form an upper liquid phase rich in hydrogen fluoride and a lower liquid phase rich in dichlorofluoromethane and recovering dichlorofluoromethane containing a decreased amount of hydrogen fluoride from the lower liquid phase, or by distilling the mixture and removing hydrogen fluoride in the form of an azeotropic mixture of hydrogen fluoride and dichlorofluoromethane.