cas 431-31-2, 1,1,1,2,3-PENTAFLUOROPROPANE

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METHOD FOR PREPARING 2,3,3,3-TETRAFLUOROPROPENE AND 1,3,3,3-TETRAFLUOROPROPENE
A method for preparing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene, including: providing a first reactor including a first section, a second section, and a third section, with each section being filled with different catalysts, preheating hexafluoropropylene and hydrogen, and introducing the hexafluoropropylene and the hydrogen to the first reactor to yield a first mixture including: 1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, and hydrogen fluoride; introducing the first mixture to a first distillation column to yield 1,1,1,2,3,3-hexafluoropropane at a top of the first distillation column and 1,1,1,2,3-pentafluoropropane and hydrogen fluoride at a bottom of the first distillation column, recycling the 1,1,1,2,3,3-hexafluoropropane to a lower part of the first section of the first reactor, and introducing the 1,1,1,2,3-pentafluoropropane and the hydrogen fluoride to a second reactor to yield a second mixture including: 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, hydrogen fluoride, and 1,1,1,2,3-pentafluoropropane; and performing water washing, alkaline washing, drying, and distillation on the second mixture to yield 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.
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Page/Page column 0044-0046

(2017/11/29)

METHOD AND APPARATUS FOR CONTINUOUSLY PRODUCING 1,1,1,2,3-PENTAFLUOROPROPANE WITH HIGH YIELD
A method and apparatus for method of continuously producing 1,1,1,2,3-pentafluoropropane with high yield is provided. The method includes (a) bringing a CoF3-containing cobalt fluoride in a reactor into contact with 3,3,3-trifluoropropene to produce a CoF2-containing cobalt fluoride and 1,1,1,2,3-pentafluoropropane, (b) transferring the CoF2-containing cobalt fluoride in the reactor to a regenerator and bringing the transferred CoF2-containing cobalt fluoride into contact with fluorine gas to regenerate a CoF3-containing cobalt fluoride, and (c) transferring the CoF3-containing cobalt fluoride in the regenerator to the reactor and employing the transferred CoF3-containing cobalt fluoride in Operation (a). Accordingly, the 1,1,1,2,3-pentafluoropropane can be continuously produced with high yield from the 3,3,3-trifluoropropene using a cobalt fluoride (CoF2/CoF3) as a fluid catalyst, thereby improving the reaction stability and readily adjusting the optimum conversion rate and selectivity.
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Paragraph 0110-0111

(2014/05/20)

Method and apparatus for continuously producing 1,1,1,2,3-pentafluoropropane with high yield
A method and apparatus for method of continuously producing 1,1,1,2,3-pentafluoropropane with high yield is provided. The method includes (a) bringing a CoF3-containing cobalt fluoride in a reactor into contact with 3,3,3-trifluoropropene to produce a CoF2-containing cobalt fluoride and 1,1,1,2,3-pentafluoropropane, (b) transferring the CoF2-containing cobalt fluoride in the reactor to a regenerator and bringing the transferred CoF2-containing cobalt fluoride into contact with fluorine gas to regenerate a CoF3-containing cobalt fluoride, and (c) transferring the CoF3-containing cobalt fluoride in the regenerator to the reactor and employing the transferred CoF3-containing cobalt fluoride in Operation (a). Accordingly, the 1,1,1,2,3-pentafluoropropane can be continuously produced with high yield from the 3,3,3-trifluoropropene using a cobalt fluoride (CoF2/CoF3) as a fluid catalyst, thereby improving the reaction stability and readily adjusting the optimum conversion rate and selectivity.
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Paragraph 0095-0097

(2014/06/11)

Compositions
A composition comprising HCFO-1233xf and at least one additional compound selected from the group consisting of HCFO-1233zd, HCFO-1232xd, HCFO-1223xd, HCFC-253fb, HCFC-233ab, HFO-1234yf, HFO-1234ze, ethylene, HFC-23, CFC-13, HFC-143a, HFC-152a, HFO-1243zf, HFC-236fa, HCO-1130, HCO-1130a, HFO-1336, HCFC-244bb, HCFC-244db, HFC-245fa, HFC-245cb, HCFC-133a, HCFC-254fb, HCFC-1131, HCFO-1242zf, HCFO-1223xd, HCFC-233ab, HCFC-226ba, and HFC-227ca.
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Paragraph 0121; 0122; 0123

(2013/09/12)

HYDROGEN FLUORIDE-HFC-254EB AZEOTROPE AND ITS USES
Described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture comprising 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride comprising: subjecting said 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride mixture to a distillation step, forming a column distillate composition comprising an azeotropic or near-azeotropic composition of said 1,1,1,2-tetrafluoropropane and hydrogen fluoride, and a bottoms composition of 1,1,1,2,3-pentafluoropropane. The column distillate may optionally be made essentially free of 1,1,1,2,3-pentafluoropropane and the column bottoms composition may optionally be made essentially free of HF. Also described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture of 1,1,1,2-tetrafluoropropane and hydrogen fluoride. Also described are azeotropic and azeotrope-like compositions comprising 1,1,1,2-tetrafluoropropane and hydrogen fluoride.
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Page/Page column 15

(2011/05/11)

PROCESS FOR THE PREPARATION OF 2, 3, 3, 3-TRIFLUOROPROPENE
The invention provides a process for the preparation of 1234yf comprising (a) contacting 1,1, 2,3,3, 3-hexafluoropropene (1216) with hydrogen in the presence of a hydrogenation catalyst to produce 1,1,2,3,3,3-hexafluoropropane (236ea); (b) dehydrofluorinating 236ea to produce 1,2,3,3,3-pentafluoropropene (1225ye); (c) contacting 1225ye with hydrogen in the presence of a hydrogenation catalyst to produce 1,2,3,3,3-pentafluoropropane (245eb); and (d) dehydrofluorinating (245eb) to produce (1234yf).
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Page/Page column 17-18

(2009/12/23)

PROCESS FOR PRODUCING 1,1,1,2-TETRAFLUOROPROPENE
Using hexafluoropropene (HFP) as a raw material, 1,1,1,2-tetrafluoropropene (HFC-1234yf) is obtained by hydrogenation, dehydrofluorination and distillation. In a series of reactions comprised of hydrogenating HFP to obtain 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), dehydrofluorinating the HFC-236ea to obtain 1,1,1,2,3-pentafluoropropene (HFC-1225ye), hydrogenating the HFC-1225ye to obtain 1,1,1,2,3-pentafluoropropane (HFC-245eb), and dehydrofluorinating the HFC-245eb to obtain HFC-1234yf, the hydrogenations and the dehydrofluorinations are respectively carried out in the one step, and then distillation is carried out so that HFC-1234yf can be obtained. Alternately, HFC-1234yf can also be obtained by hydrogenating HFP to directly obtain HFC-245eb, and separating the HFC-245eb by distillation and dehydrofluorinating it. Thus, HFC-1234yf can be produced with a high selectivity.
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Page/Page column 21-22; 24

(2009/08/14)

PROCESS FOR SYNTHESIS OF FLUORINATED OLEFINS
Disclosed is a process for the synthesis of fluorinated olefins, and in particularly preferred embodiments tetrafluorinated olefins having F on an unsaturated, non-terminal carbon, such as 2,3,3,3-tetrafluoropropene. The preferred processes of the present invention in accordance with one embodiment generally comprise: (a) reacting a compound of formula (I) [in-line-formulae]X1X2??(I)[/in-line-formulae] with a compound of formula (II) [in-line-formulae]CX1X2X3CX1═CX1X2??(II)[/in-line-formulae] to produce a reaction product comprising a compound of formula (III) [in-line-formulae]CF3CHX1CH2X2??(III), and[/in-line-formulae](b) exposing said compound of formula (III) to reaction conditions effective to convert said compound of formula (III) to a compound of formula (IV) [in-line-formulae]CF3CZ=CH2??(IV)[/in-line-formulae] wherein X1, X2, and X3 are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine and iodine, provided that X1 and X2 in formula (I) are not both hydrogen and Z is Cl, I, Br, or F.
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Page/Page column 3

(2009/04/25)

PROCESS FOR THE SYNTHESIS AND SEPARATION OF HYDROFLUOROOLEFINS
A process for the synthesis of fluorinated olefins of the formula CF3CF=CHX, wherein X is F or H comprising contacting hexafluoropropene with hydrogen chloride in the vapor phase, in the presence of a catalyst, at a temperature in the range from about 200 °C to about 350 °C, wherein the mole ratio of hydrogen chloride to hexafluoropropene is from about 2:1 to about 4:1, separating the 1-chloro-1,2,3,3,3-pentafluoro-1-propene, 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene and hydrogen fluoride products from unreacted hexafluoropropene, and hydrogen chloride by distillation, hydrogenating either the 1-chloro-1,2,3,3,3-pentafluoro-1-propene, 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene or mixture thereof over a catalyst, and dehydrochlorinating the said hydrogenation product to produce either 1225ye or 1234yf.
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Page/Page column 15-17

(2008/12/07)

PROCESSES FOR PRODUCING PENTAFLUOROPROPENES AND AZEOTROPES COMPRISING HF AND CERTAIN HALOPROPENES OF THE FORMULA C3CI2F4, C3CIF5, OR C3HF5
A process is disclosed for making CF3CF=CHF or mixtures thereof with CF2=CFCHF2. The process involves (i) contacting CHCl2CF2CF3, and optionally CHClFCF2CClF2, in a reaction zone in the presence of a catalytically effective amount of dehydrofluorination catalyst to produce CCl2=CFCF3, and, if CHClFCF2CClF2 is present, CClF=CFCClF2; (ii) contacting CCl2=CFCF3 and CClF=CFCClF2, if any, formed in (i) with hydrogen fluoride (HF) in a reaction zone, optionally in the presence of a fluorination catalyst, to produce CClF=CFCF3, and if CClF=CFCClF2 is present, CF2=CFCClF2; (iii) contacting CClF=CFCF3 and CF2=CFCClF2, if any, formed in (ii) in a reaction zone with H2 in the presence of a catalyst comprising a catalytically effective amount of palladium supported on a support of chromium oxide, fluorinated chromium oxide, chromium fluoride, aluminum oxide, aluminum fluoride, and/or fluorinated alumina to produce a product mixture comprising CF3CF=CHF, and if CF2=CFCClF2 is present, CF2=CFCHF2; and (iv) recovering CF3CF=CHF, or a mixture thereof with CF2=CFCHF2, from the product mixture formed in (iii); and optionally (v) separating at least a portion of any CF3CF=CHF in the product mixture formed in (iii) from the CF2=CFCHF2 in the product mixture formed in (iii). Also disclosed are azeotropic compositions involving CCl2=CFCF3 and HF; involving CCl2=CFCF3, CClF=CFCClF2 and HF; involving CClF=CFCF3 and HF; involving CClF=CFCF3, CF2=CFCClF2 and HF; or involving CF2=CFCHF2 and HF.
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Page/Page column 18

(2008/12/05)

1,2,3,3,3-PENTAFLUOROPROPENE PRODUCTION PROCESSES
A process is disclosed for making CF3CF=CHF. The process involves reacting CF3CCIFCCI2F with H2 in a reaction zone in the presence of a catalyst to produce a product mixture comprising CF3CF=CHF. The catalyst has a catalytically effective amount of palladium supported on a support selected from the group consisting of alumina, fluorided alumina, aluminum fluoride and mixtures thereof and the mole ratio of H2 to CF3CCIFCCI2F fed to the reaction zone is between about 1 :1 and about 5:1.. Also disclosed are azeotropic compositions of CF3CCIFCCI2F and HF and azeotropic composition of CF3CHFCH2F and HF.
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Page/Page column 15-16

(2008/06/13)

PROCESS FOR THE PREPARATION OF 1,1,1,3,3-PENTAFLUOROPROPANE AND 1,1,1,2,3-PENTAFLUOROPROPANE
A process is disclosed for the manufacture of CF3CH2CHF2 and CF3CHFCH2F. The process involves (a) reacting hydrogen fluoride, chlorine, and at least one halopropene of the formula CX3CCl=CClX (where each X is independently F or Cl) to produce a product including both CF3CCl2CClF2 and CF3CClFCCl2F; (b) reacting CF3CCl2CClF2 and CF3CClFCCl2F produced in (a) with hydrogen to produce a product including both CF3CH2CHF2, and CF3CHFCH2F; and (c) recovering CF3CH2CHF2 and CF3CHFCH2F from the product produced in (b). In (a), the CF3CCl2CClF2 and CF3CClFCCl2F are produced in the presence of a chlorofluorination catalyst including a ZnCr2O4/crystalline α-chromium oxide composition, a ZnCr2O4/crystalline α-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/α-chromium oxide composition and/or a zinc halide/α-chromium oxide composition which has been treated with a fluorinating agent.
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Page/Page column 16; 19

(2008/06/13)