Chemical process

Details Chemical process Chemical process

C - Chemistry, Metallurgy

07

C

260/658.2

C07C 17/20 (2006.01) C07C 17/21 (2006.01) C07C 19/08 (2006.01)

Patent

CA 2039196

1,1,1.2-totrafluoroethane (HFA 134a) is manufactured from trichloroethylene by a two-stage process comprising reacting trichioroethylene with hydrogen fluoride under auperatmospheric proscure in a first reaction zone to form 1,1,1-trifluoro-2-chloroethane (133a) and reacting the 1.1,1-trifluoro-2-chloroethane with hydrogen fluoride in a second reaction zone to form 1,1,1.2-tetrafluoraechane; the entire product stream from the 133a reaction zone togethor with additional HF of required ie fed through the 134a reaction zone. The two reaction zones may ne provided within a single reaction vessel.

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