Abstract:
An azeotrope containing HF and 1,1,1-trifluoro-3-chloro-2-propene (1233zd) is provided, as are methods for separating this azeotrope from mixtures of HF and 1233zd which are HF-rich or 1233zd-rich and methods for making use of the azeotrope and separation methods to improve processes for preparing 1233zd, an intermediate used in the preparation of 1,1,1,3,3,-pentafluoropropane (245f), which is a known foam blowing agent and refrigerant.
Abstract:
A process for the preparation of 1-chloro-2,2-difluoroethane ("142") by fluorinating 1,1,2-trichloroethane in the gas phase with HF in the presence of a fluorination catalyst. 142 is a known foam blowing agent.
Abstract:
A process for the preparation of 1-chloro-2,2-difluoroethane ("142") wherein 1,2-dichloroethene ("1130") is fluorinated in the gas phase in the presence of a catalyst which is a supported or unsupported fluorinated salt of one or more of chromium, iron, niobium, nickel, antimony, tin, tantalum or titanium. 142 is a known foam blowing agent.
Abstract:
A process for the preparation of 1,1,1,3,3-pentafluoropropane (245fa) is provided, wherein 1233zd is first fluorinated to 1234ze, followed by fluorination of 1234ze to 245fa. 245fa is a known foam blowing agent and refrigerant.