摘要:
Disclosed is a process for the manufacture of 2,3,3,3-tetrafluoropropene comprising: (a) contacting 1,1,1,2,3-pentafluoropropane with a catalyst comprised of chromium (III) oxide and from 0.1% to 2% of an alkali metal disposed on the surface of said catalyst, to produce a product mixture comprising 2,3,3,3-tetrafluoropropene and hydrogen fluoride; and (b) recovering said 2,3,3,3-tetrafluoropropene from the product mixture produced in (a).
摘要:
Compositions comprising CF3CClFCH2OH, CF3CClFCH2OZnCl, and CF3CClFCH2OC(═O)CH3 are useful in processes to make HFO-1234yf. Compositions comprising HFO-1234yf may comprise at least one additional compound selected from the group consisting of CFC-114a, HCFC-124, HFC-143a, CFO-1113, HFO-1123, HFO-1132a, tetrafluoroethene, HCFO-1122, 3,4,4,4-tetrafluoro-2-butanone, acetyl fluoride, 2-chloro-2,3,3,3-tetrafluoropropanol, 2-chloro-2,3,3,3-tetrafluoropropyl acetate, Zinc (2-chloro-2,3,3,3-tetrafluoropropoxy)chloride, 2-chloro-2,3,3,3-tetrafluoropropoxy methyl acetate, 1,3-bistrifluoromethyl-1,3-difluorocyclobutane, 2,3,3,3-tetrafluoropropyl acetate, dimethylformamide, pyridine, ethyl acetate, acetic acid, diethyl ether, acetic anhydride, methyl acetate, dimethylacetamide, methanol, ethanol, methyl formate, pyrazine, pyrimidine, N-methylpyrrolidine, N-methylpiperidine, hexamethylphosphoramide, tetrahydrofuran, 1,4-dioxane, N-methylpyrrolidinone, dimethyl sulfoxide, acetonitrile, benzonitrile, and mixtures thereof. Compositions comprising HFO-1234yf are useful, among other uses, as heat transfer compositions for use in refrigeration, air-conditioning and heat pump systems.
摘要:
Disclosed are compositions comprising HFC-245eb and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-245fa, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-143a, HFC-134, HFC-134a, FC-1216, HFO-1234yf, HFC-254eb, HFO-1243zf, and HFC-254fb. Compositions comprising HFC-245eb are useful in processes to make HFO-1234yf. Also disclosed are compositions comprising HFO-1234yf and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFC-254fb, HFO-1243zf, HFCHFC-245eb, HFC-245fa, HFC-245cb, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-134, HFC-134a, HFO-1132a and FC-1216. Compositions comprising HFO-1234yf are useful as heat transfer compositions for use in refrigeration, air-conditioning and heat pump systems.
摘要:
Disclosed is a process comprising reacting CF3CCl2CF2CF3 (CFC-318ma) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CCl═CFCF3 (CFC-1317mx). Also disclosed is a process comprising reacting CF3CCl═CFCF3 (CFC-1317mx) with hydrogen in the presence of a dehalogenation catalyst to produce CF3C≡CCF3 (hexafluoro-2-butyne). Hexafluoro-2-butyne can be used to produce CF3CH═CHCF2CF3 (1,1,1,4,4,5,5,5-octafluoro-2-pentene).
摘要:
A process is disclosed to increase the Z/E ratio of 1,2,3,3,3-pentafluoropropene. The process involves contacting a starting material comprising 1,2,3,3,3-pentafluoropropene with a catalyst on AlF3 or carbon, wherein the catalyst is selected from the group consisting of SbClwF5-w, TiClxF4-x, SnClyF4-y and TaCl2F5-z wherein w is from 0 to 4, x is from 0 to 3, y is from 0 to 3, z is from 0 to 4, to obtain a product wherein the Z/E ratio of 1,2,3,3,3-pentafluoropropene is increased relative to the Z/E ratio of 1,2,3,3,3-pentafluoropropene in the starting material.A process is also disclosed to decrease the Z/E ratio of 1,2,3,3,3-pentafluoropropene. The process involves contacting a starting material comprising 1,2,3,3,3-pentafluoropropene with a catalyst on AlF3 or carbon, wherein the catalyst is selected from the group consisting of SbClwF5-w, TiClxF4-x, SnClyF4-y and TaClzF5-z wherein w is from 0 to 4, x is from 0 to 3, y is from 0 to 3, z is from 0 to 4, to obtain a product wherein the Z/E ratio of 1,2,3,3,3-pentafluoropropene is decreased relative to the Z/E ratio of 1,2,3,3,3-pentafluoropropene in the starting material.
摘要:
A 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.
摘要:
Disclosed herein is a process to produce an azeotrope composition comprising a hydrofluoroolefin and hydrogen fluoride, said process comprising, dehydrofluorinating a hydrofluorocarbon containing at least one hydrogen and at least one fluorine on adjacent carbons, thereby forming a mixture comprising said hydrofluoroolefin, unreacted hydrofluorocarbon and hydrogen fluoride, and distilling the mixture to produce a distillate composition comprising an azeotrope composition containing said hydrofluoroolefin and hydrogen fluoride and a column bottoms composition comprising said hydrofluorocarbon essentially free of hydrogen fluoride. Also disclosed herein are processes for separation of hydrofluoroolefins from hydrofluorocarbons and from hydrogen fluoride.
摘要:
The present invention relates to compositions comprising at least one fluoroolefin and an effective amount of stabilizer that may be a terpene, terpenoid or fullerene; or a mixture of a terpene, terpenoid or fullerene with other stabilizers. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers, and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.
摘要:
Disclosed herein is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents with hydrogen. Also disclosed is a catalyst composition for the hydrodechlorination of chlorofluoroalkenes comprising copper metal deposited on a support.
摘要:
Disclosed herein are azeotrope compositions comprising 1,2,3,3,3-pentafluoropropene and hydrogen fluoride. The azeotrope compositions are useful in processes to produce and in processes to purify 1,2,3,3,3-pentafluoropropene. Additionally, disclosed herein are azeotrope and near-azeotrope compositions comprising 1,1,1,2,3,4,4,5,5,5-decafluoropentane and hydrogen fluoride.