US Patent No: 6,303,838
Number of patents in Portfolio can not be more than 2000
Separating 1,1,1,3,3-pentafluoropropane from hydrogen fluoride
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Oct 16, 2001
Issued date -
Mar 31, 2000
filing date -
09/509,859
serial no -
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Abstract
Disclosed are processes for separating 1,1,1,3,3-pentafluoropropane (HFC-245fa) from hydrogen fluoride (HF) by distillation, wherein hydrocarbons, chloroflurocarbons, hydrochlorofluorocarbons and fluorocarbons are used as entraining agents. The processes comprise: contacting a first mixture comprising HFC-245fa and HF with an entraining agent selected from the group consisting of hydrocarbons, chlorofluorocarbons, hydrochlorofluorocarbons and fluorocarbons to form a second mixture, distilling the second mixture and thereby separating the HFC-245fa from HF and entraining agent, and recovering HFC-245fa substantially-free of HF.
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