Method for purifying pentafluoroethane in a binary azeotrope of pentafluoroethane and chloropentafluoroethane.

摘要

The invention generally relates to a for the purification of a component of an azeotrope BINARIO process in which the composition of the azeotrope CHANGES AROUND 10 PERCENT MOLAR WITH PRESSURE comprising: a) subjecting an azeotrope BINARY TO A PHASE OF DISTILLATION IN MORE THAN THAT ELIMINATES one of the binary components while the distillation (distillation 1) WITH funds (1) enriched in the other component; B) subjecting the distillation 1 to at least one stage further distillation ENTERED INTO A DIFFERENT PRESSURE IN WHICH THE MAJORITY OF COMPONENT RECOVERED AS FUNDS 1 SE while eliminating DISTILLATION 2 WITH FUNDS 2 ENRICHED IN COMPONENT ENRICHED IN THE DISTILLATION 1 ; C) optionally repeating step (B) as many times as desired; YD) recovering the purified component DESIRED. The invention is particularly useful in purifying pentafluoroethane in an azeotrope pentafluoroethane / chloropentafluoroethane.