- AZEOTROPE COMPOSITIONS COMPRISING NONAFLUOROPENTENE AND HYDROGEN FLUORIDE AND USES THEREOF
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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.
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Page/Page column 29-31
(2008/06/13)
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- SELECTIVELY REACTING OLEFINS HAVING A TERMINAL CF2 GROUP IN A MIXTURE
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A process is disclosed for reducing the mole ratio of (1) compounds of the formula Y1Y2C=CF2 wherein Y1 and Y2 are each independently H, F, CI, Br, C1-C6 alkyl or C1-C6 haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent to (2) saturated compounds of the formula CdHeFfCIgBrhIk wherein d is an integer from 1 to 10, and e+f+g+h+k is equal to 2d+2, provided that g is 0, 1, 2 or 3, h is 0, 1 or 2 and k is 0 or 1 and/or unsaturated compounds of the formula Y3Y4C=CY5Y6, wherein Y3, Y5 and Y6 are each independently H, F, CI Br, C1-C6 alkyl or C1-C6 haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, provided that Y5 and Y6 are not both F, and Y4 is C1-C6 alkyl or C1-C6 haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, in a mixture. The process involves contacting the mixture with at least one selective removal agent selected from the group consisting of SO3 and RSO3H, wherein R is selected from the group consisting of F, CI, OH, C1-C8 alkyl, C1-C8 fluoroalkyl, and C1-C8 fluoroalkoxyalkyl containing no more than two ether oxygens to selectively react the formula Y1Y2C=CF2 compounds.
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- Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyfluoroalkanes in cleaning compositions
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A catalyic process is disclosed for producing fluorine-substituted hydrocarbon products of the formulae RCH2CF2R and RFC═CHR at an elevated temperature, from compounds of the formula RCHFCHFR, where each R is independently selected from the group consisting of —CF3, —CF2CF3and —CF2CF2CF3or where both R groups of a formula together are —(CF2)2—, —(CF2)3— or —(CF2)4—. Suitable catalysts include carbon catalysts and catalysts containing at least one compound of a selected metal (e.g., Na, K, Rb, Cs, Y, La, Ce, Pr, Nd, Sm, Cr, Fe, Co, Rh, Ni, Cu, and/or Zn) supported on carbon. The saturated gem-dihydro- products may also be produced by hydrofluorinating the corresponding olefinic product over such catalysts at an elevated temperature, and can be combined with various other miscible solvents to form compositions useful for cleaning. Compounds such as CF3CF2CH2CF2CF3, CF3CF2CH2(CF2)2CF3, CF3CH═CF (CF2)2CF3, CF3CF═CH(CF2)2CF3, CF3CF2CH2(CF2)3CF3, CF3(CF2)2CH2(CF2)2CF3, CF3CH═CF(CF2)3CF3, CF3CF═CH (CF2)3CF3, CF3(CF2)2CH2(CF2)3CF3, CF3CF2CH2(CF2)4CF3, CF3CH═CF(CF2)4CF3, CF3CF═CH (CF2)4CF3, CF3CF2CH═CF(CF2)3CF3, CF3CF2CF═CH(CF2)3CF3and and azeotropic compositions such as azeotropes of CF3CH2CF2CF2CF3and/or CF3CF2CH2CF2CF3with methanol, ethanol, or isopropanol are disclosed.
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- Saturated linear polyfluorohydrocarbons, processes for their production, and their use in cleaning compositions
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The compounds CF3 CHFCHFCF2 CF3, CF3 CH2 CHFCF2 CF3, CF3 CHFCH2 CF2 CF3, CF3 CHFCHFCF2 CF2 CF3, CF3 CH2 CHFCF2 CF2 CF3, CF3 CHFCH2 CF2 CF2 CF3, CF3 CF2 CH2 CHFCF2 CF3, CF3 CF2 CHFCHFCF2 CF2 CF3, CF3 CHFCHFCF2 CF2 CF2 CF3, CF3 CHFCH2 CF2 CF2 CF2 CF3, CF3 CH2 CHFCF2 CF2 CF2 CF3, CF3 CF2 CHFCH2 CF2 CF2 CF3, and CF3 CF2 CH2 CHFCF2 CF2 CF3 ; and compositions thereof. Catalytic processes using Group VIII metals are disclosed for reacting selected olefinic starting materials with hydrogen to produce as the major products dihydropolyfluoroalkanes or trihydropolyfluoroalkanes wherein the hydrogens are positioned on two adjacent carbon atoms; as are processes using iodine and/or hydrogen iodide in the reduction of selected olefinic starting materials to dihydropolyfluoroalkanes or trihydropolyfluoroalkanes.
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