Two-step process for manufacturing 1,1-difluoroethane

摘要

A process is disclosed for producing 1,1-difluoroethane (CH3CHF2 or HFC-152a) in a two-step reaction in a manner that reduces formation of high boiling materials. The first step comprises adding at least one of HCl or HF to chloroethene (CH2=CHCl) in order to obtain at least one of 1,1-dichloroethane (CH3CHF2) or 1-chloro-1-fluoroethane (CH3CHClF). The second step comprises converting 1,1-dichloroethane or 1-chloro-1-fluoroethane to 1,1-difluoroethane.