Synthesis of hydrogen perfluoroalkanes
    32.
    发明授权
    Synthesis of hydrogen perfluoroalkanes 失效
    氢全氟烷烃的合成

    公开(公告)号:US5382723A

    公开(公告)日:1995-01-17

    申请号:US186493

    申请日:1994-01-26

    CPC classification number: C07C17/23

    Abstract: The invention relates to the synthesis of hydrogenperfluoroalkanes R.sub.F H, R.sub.F denoting a perfluoroalkyl radical containing 2 to 20 carbon atoms, by reaction of the corresponding perfluoroalkyl iodide R.sub.F I with an alkali metal hydroxide.The use of methanol as solvent allows the formation of tars to be avoided, an almost total conversion of R.sub.F I and an R.sub.F H of excellent purity to be obtained, and the alkali metal iodide by-product to be recovered easily.

    Abstract translation: 本发明涉及通过相应的全氟烷基碘化物RFI与碱金属氢氧化物的反应来合成表示含有2-20个碳原子的全氟烷基的全氟烷烃RFH,RF。 使用甲醇作为溶剂可以避免形成焦油,要获得的RFI和RFH几乎全部转化得到极好的纯度,而容易回收的碱金属碘化物副产物。

    Catalysts for liquid phase fluorination
    33.
    发明授权
    Catalysts for liquid phase fluorination 失效
    液相氟化催化剂

    公开(公告)号:US5202509A

    公开(公告)日:1993-04-13

    申请号:US890343

    申请日:1992-05-20

    CPC classification number: C07C17/21 B01J27/135 C07C17/206

    Abstract: The catalysts according to the invention are mixtures of an antimony trihalide and of a titanium tetrahalide.These catalysts can be used for the liquid phase fluorination of halogenated aliphatic hydrocarbons, especially that of chlorinated ethane and ethylene derivatives.

    Abstract translation: 根据本发明的催化剂是三卤化锑和四卤化钛的混合物。 这些催化剂可用于卤代脂族烃的液相氟化,特别是氯化乙烷和乙烯衍生物。

    Synthesis of perfluoroalkyl bromides
    35.
    发明授权
    Synthesis of perfluoroalkyl bromides 失效
    全氟烷基溴化物的合成

    公开(公告)号:US4912269A

    公开(公告)日:1990-03-27

    申请号:US214201

    申请日:1988-06-28

    CPC classification number: C07C17/093

    Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes, CnF.sub.2n+1 -Br (n=1 to 20).Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride, C.sub.n F.sub.2n+1 -SO.sub.2 Cl, in the presence of a catalyst consisting of a tertiary amine or phosphine or a quaternary ammonium or phosphonium salt, at a temperature ranging from 80.degree. to 200.degree. C.

    Abstract translation: 本发明涉及全氟烷基溴或溴全氟烷烃CnF2n + 1-Br(n = 1〜20)的制备。 在由叔胺或膦或季铵盐或鏻盐组成的催化剂的存在下,在80至200℃的温度下,将气态溴化氢与全氟烷基磺酰氯CnF2n + 1-SO2Cl反应。

Patent Agency Ranking