| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for isolating/purifying 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) as an intermediate in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).SOLUTION: This invention relates to a method for removing 1,1,1,2,3,3-hexafluoropropane from a mixture containing 1,1,1,2,3,3-hexafluoropropane and at least one impurity, comprising: adding hydrogen fluoride and, optionally, hexafluoropropene to the mixture in an effective amount to form an azeotropic or azeotrope-like composition of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene, and hydrogen fluoride; and separating the azeotropic composition from the impurity.SELECTED DRAWING: None |
