Synthesis of 1-chloro-1, 1-difluoroethane
    11.
    发明授权
    Synthesis of 1-chloro-1, 1-difluoroethane 失效
    合成1-氯-1,1-二氟乙烷

    公开(公告)号:US4849555A

    公开(公告)日:1989-07-18

    申请号:US205941

    申请日:1988-06-13

    CPC分类号: C07C17/206

    摘要: The invention relates to a process for the manufacture of 1-chloro-1,1-difluoroethane in the liquid phase by reacting hydrofluoric acid with 1,1,1-trichloroethane and/or 1,1-dichloro-1-fluoroethane.The selectively is improved by using a perfluoroalkanesulphonic acid, in particular trifluoromethanesulphonic acid, as a catalyst.

    摘要翻译: 本发明涉及通过氢氟酸与1,1,1-三氯乙烷和/或1,1-二氯-1-氟乙烷反应制备液相中的1-氯-1,1-二氟乙烷的方法。 通过使用全氟烷基磺酸,特别是三氟甲磺酸,作为催化剂来选择性地改进。

    Process for the purification of 1,1,1,2-tetrafluoroethane
    12.
    发明授权
    Process for the purification of 1,1,1,2-tetrafluoroethane 失效
    1,1,1,2-四氟乙烷纯化方法

    公开(公告)号:US06395941B1

    公开(公告)日:2002-05-28

    申请号:US08888294

    申请日:1997-07-03

    IPC分类号: C07C1708

    CPC分类号: C07C17/395 C07C19/08

    摘要: In order to remove the impurities (in particular 1-chloro-2,2-difluoroethylene) present in crude 1,1,1,2-tetrafluoroethane (F134a), a gaseous mixture of crude F134a and hydrofluoric acid is treated in the gas phase, in the presence of a fluorination catalyst, at a temperature of between 200 and 380° C. and under a pressure between atmospheric pressure and 2.5 MPa, the HF/F134a molar ratio being between 0.05 and 0.5.

    摘要翻译: 为了除去原料1,1,1,2-四氟乙烷(F134a)中存在的杂质(特别是1-氯-2,2-二氟乙烯),将粗F134a和氢氟酸的气体混合物在气相 在氟化催化剂的存在下,在200-380℃的温度下,在大气压和2.5MPa之间的压力下,HF / F134a的摩尔比为0.05-0.5。

    Process for the recovery of antimony-based catalysts used for the
fluorination of halgenated hydrocarbons
    15.
    发明授权
    Process for the recovery of antimony-based catalysts used for the fluorination of halgenated hydrocarbons 失效
    用于回收氢化烃的反应性催化剂的方法

    公开(公告)号:US5198199A

    公开(公告)日:1993-03-30

    申请号:US827775

    申请日:1992-01-29

    摘要: To recover the antimony contained in a solution of use antimony-containing catalyst, emananting from units for the fluorination or chlorofluorination of halogenated hydrocarbons comprising at least two carbon atoms, the solution is concentrated to the limit of distillation of antimony trichloride, an excess of chlorine is then added to convert SbCl.sub.3 to SbCl.sub.5, and SbCl.sub.5 is distilled under reduced pressure without exceeding 120.degree. C.The recoverd antimony pentachloride is sufficiently pure to be able to be recycled directly to the fluorination reactor.

    摘要翻译: 为了回收使用含锑催化剂的溶液中所含的锑,从用于氟化或氯氟化含有至少两个碳原子的卤代烃的单元发出,将溶液浓缩至三氯化锑的极限,过量的氯 然后加入SbCl 3以将SbCl 5转化为SbCl 5,并将SbCl 5减压蒸馏而不超过120℃。回收的五氯化锑是足够纯的,能够直接再循环到氟化反应器中。

    Surface demoisturizing composition and use thereof
    19.
    发明授权
    Surface demoisturizing composition and use thereof 失效
    表面净化组合物及其用途

    公开(公告)号:US4594177A

    公开(公告)日:1986-06-10

    申请号:US468499

    申请日:1983-02-22

    摘要: Demoisturizing composition used for the displacement of liquid water, comprising a chlorofluorocarbon that is liquid at room temperature, containing a surface-active agent responding to the formula: ##STR1## in which R is an alkyl group in C.sub.6 -C.sub.18R' is an alkyl group in C.sub.1 to C.sub.2R" is an alkyl group in C.sub.1 to C.sub.18p is a value ranging between 1 and 2characterized in that the surface-active composition is prepared by mixing the following three constituents: ##STR2## where R.sub.F represents a straight or branched perfluorinated alkyl chain of formula C.sub.q F.sub.2q+1 in which q is a whole number ranging between 2 and 20 and where X is a divalent bond group that may be partially halogenated and R.sub.1 and R.sub.2 represent a hydrogen atom, an alkyl radical or a hydroxyalkyl radical, containing less than 6 carbon atoms.

    摘要翻译: 用于置换液态水的脱模组合物,其包含在室温下为液体的含氟氟烃,其含有响应于下式的表面活性剂:其中R是C 6 -C 18 R'中的烷基是烷基 C1至C2中的基团R“是C1至C18中的烷基,p为1至2的范围,其特征在于表面活性组合物通过混合以下三种成分制备:(R'O )p(OH)2-pPO2H其中RF表示式CqF2q + 1的直链或支链全氟化烷基链,其中q是2和20之间的整数,并且其中X是可以部分的二价键基团 卤代,R 1和R 2表示含有少于6个碳原子的氢原子,烷基或羟烷基。