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    • 9. 发明授权
    • Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyfluoroalkanes in cleaning compositions
    • 双氢多氟烷烃和单氢聚氟烯烃,其制备方法和偕二氢多氟烷烃在清洁组合物中的用途
    • US06194619B1
    • 2001-02-27
    • US08116938
    • 1993-09-10
    • V. N. Mallikarjuna RaoFrank Julian WeigertCarl G. Krespan
    • V. N. Mallikarjuna RaoFrank Julian WeigertCarl G. Krespan
    • C07C1908
    • C23G5/02803C07C17/087C07C17/25C07C17/278C07C17/354C07C17/358C07C19/08C07C21/18C07C23/08C11D7/28C11D7/32C11D7/5013C11D7/5018C11D7/5081
    • 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, —CF2CF3 and —CF2CF2CF3 or 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)3CF3 and and azeotropic compositions such as azeotropes of CF3CH2CF2CF2CF3 and/or CF3CF2CH2CF2CF3 with methanol, ethanol, or isopropanol are disclosed.
    • 公开了一种用于在升高的温度下从式RCHFCHFR的化合物生产式RCH2CF2R和RFC = CHR的氟取代烃产物的催化方法,其中每个R独立地选自-CF 3,-CF 2 CF 3和 - CF 2 CF 2 CF 3或式中的两个R基团均为 - (CF 2)2 - , - (CF 2)3 - 或 - (CF 2)4 - 。 合适的催化剂包括含有至少一种选择的金属化合物(例如Na,K,Rb,Cs,Y,La,Ce,Pr,Nd,Sm,Cr,Fe,Co,Rh,Ni,Cu ,和/或Zn)。饱和的偕二氢产物也可以通过在高温下在这样的催化剂上氢化相应的烯属产物来制备,并且可以与各种其它可混溶的溶剂组合以形成用于清洁的组合物 。 CF3CF2CH2CF2CF3,CF3CF2CH2(CF2)2CF3,CF3CH = CF(CF2)2CF3,CF3CF = CH(CF2)2CF3,CF3CF2CH2(CF2)3CF3,CF3(CF2)2CH2(CF2)2CF3,CF3CH = CF(CF2)3CF3 ,CF 3 CF = CH(CF 2)3 CF 3 CF 3 CF 3 CF 2 CF 2 CF 2 CF 3 CF 3 CF = CF(CF 2)4 CF 3 CF 3 CF = CH(CF 2)4 CF 3 CF 3 CF 2 CH = CF(CF 2)3 CF 3 CF 3 CF 2 CF = CH(CF 2)3 CF 3,和共沸组合物如CF 3 CH 2 CF 2 CF 2 CF 3和/或CF 3 CF 2 CH 2 CF 2 CF 3与甲醇,乙醇或异丙醇的共沸物。