METHOD OF SYNTHESIS OF 1,1-DICHLORO-1-FLUOROETHANE AND A METHOD OF 1,1-DICHLOROETHYLENE CONTENT DECREASE Russian patent published in 1994 - IPC

FIELD: chemical technology. SUBSTANCE: synthesis conditions: addition reaction of hydrogen fluoride to 1,1-dichloroethylene in the presence of hydrofluorination catalyst with preparing of product with low content of 1,1-dichloroethylene by 2 stages. Catalyst - aluminium fluoride prepared by treatment of Al chloride or oxide with gaseous hydrogen fluoride at increased temperature. Method of 1,1-dichloroethylene content decrease in the mixture with 1,1-dichloro-1-fluoroethane by hydrofluorination in the presence of catalyst is described. EFFECT: improved method of synthesis. 3 cl