Process of separating/purifying pentafluoropropane
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United States of America Patent
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Mar 8, 2005
Grant Date -
Jun 6, 2002
app pub date -
Sep 28, 2001
filing date -
Jan 23, 1996
priority date (Note) -
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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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