Processes for producing and compositions comprising 2,3,3,3-tetrafluoropropene and/or 1,2,3,3-tetrafluoropropene
October 31, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of producing 1,1,2,2,3-pentafluoropropane Catalytic conversion of hydrofluoroalkanol to hydrofluoroalkene Process for the preparation of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3-pentafluoropropane Process for the preparation of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3-pentafluoropropane Process for the preparation of 1,3,3,3-tetrafluoropropene and/or 2,3,3,3-tetrafluoropropene Selectively reacting olefins having a terminal CF2 group in a mixture Process for separating a fluoroolefin from HF by liquid-liquid extraction Process for producing 2,3,3,3-tetrafluoropropene Patent #: 7872161 InventorsAssigneeApplicationNo. 12442952 filed on 10/31/2007US Classes:252/67VAPORIZATION, OR EXPANSION, REFRIGERATION OR HEAT OR ENERGY EXCHANGEExaminersPrimary: McGinty, DouglasForeign Patent References
International ClassesC09K 5/04C07C 17/20 C07C 17/357 C07C 17/25 AbstractA process is disclosed for making CF3CF═CH2 or mixtures thereof with CHF═CFCHF2. The process involves contacting CCl3CF2CF3 and optionally CCl2FCF2CClF2 with H2 in the presence of a palladium catalyst supported on a support of alumina, fluorided alumina and/or aluminum fluoride, to produce a product mixture including CH2═CFCF3 (and when CCl2FCF2CClF2 is present, CHF═CFCHF2); recovering CH2═CFCF3 or a mixture thereof with CHF═CFCHF2 from the product mixture. The present invention also provides another process that involves reacting CCl3CF2CF3 and optionally CCl2FCF2CClF2 with H2 in the presence of a hydrogenation catalyst to form CH3CF2CF3 (and when CCl2FCF2CClF2 is present, CH2FCF2CHF2); dehydrofluorinating; and recovering CH2═CFCF3 or a mixture thereof with CHF═CFCHF2.Other References
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