Process of separating/purifying pentafluoropropane

Details Process of separating/purifying pentafluoropropane Process of separating/purifying pentafluoropropane

2005-03-08

2005-03-08

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

Adding material to distilland except water or steam per se

C203S002000, C203S003000, C203S067000, C203S074000, C203S077000, C203S080000, C423S483000, C423S488000, C570S178000

Reexamination Certificate

active

06863780

ABSTRACT:
There is provided an azeotropic mixture having 1,1,1,3,3-pentafluoropropane and hydrogen fluoride. Further, there is provided a process of separating/purifying R-245fa and/or HF from a mixture of R-245fa and HF wherein the mixture of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride is subjected to a distillation step so that a distillate is obtained which has the azeotropic mixture of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride, and a bottom product is obtained which has separated/purified 1,1,1,3,3-pentafluoropropane or hydrogen fluoride.

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English language abstract of EP-A-703205.
English language abstract of EP-A-676386.
English language abstract of EP-A-542290.

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