Patent ID: 8519201

Claim:
A process for preparing 2-chloro-1,1,1,2-tetrafluoropropane comprising: a. reacting a first feed stream comprising 2-chloro-3,3,3-trifluoropropene with a second feed stream comprising hydrogen fluoride, and optionally with one or more recycle streams comprising hydrogen fluoride, to produce a crude product stream comprising 2-chloro-1,1,1,2-tetrafluoropropane, hydrogen fluoride, and 2-chloro-3,3,3-trifluoropropene; b. distilling said crude product stream to produce a first distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a first bottoms stream rich in hydrogen fluoride; and c. cooling said first distillate stream to produce an intermediate composition comprising an organic layer rich in 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, and an acid layer rich in hydrogen fluoride.