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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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
E. I. DU PONT DE NEMOURS AND COMPANYWILMINGTON, DE11859

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boehmer, Sara W Newark, DE 3 4
Mahler, Barry Asher Glen Mills, PA 36 89
Miller, Ralph Newton Newark, DE 48 201

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Patent Info (Count) # Cites Year
 
E. I. DU PONT DE NEMOURS AND COMPANY (2)
8,273,928 Processes for separation of fluoroolefins from hydrogen fluoride by azeotropic distillation 1 2007
8,658,846 Processes for separation of 2,3,3,3-tetrafluoropropene from hydrogen fluoride by azeotropic distillation 0 2009