Catalysts for liquid phase fluorination
    2.
    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

    摘要: 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.

    摘要翻译: 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。

    Process for preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetyl
malonamide
    3.
    发明授权
    Process for preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetyl malonamide 失效
    制备α-乙酰氧基-α-甲基-N,N'-二乙酰丙酰胺的方法

    公开(公告)号:US4943654A

    公开(公告)日:1990-07-24

    申请号:US819985

    申请日:1986-01-15

    CPC分类号: C07C255/00

    摘要: Process for the preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamide wherein hydrocyanic acid or a cyanide is reacted in a first step with acetic anhydride and then in a second step the reaction mixture so obtained is treated with acetic acid in the presence of an acid catalyst, wherein the first step is carried out in the presence of a catalyst based on anion exchange resins in which the functional groups are quaternary ammonium or tertiary amine, such .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamides being very useful as activators in bleaching and cleaning compositions which are thus active at lower temperatures.

    摘要翻译: 制备α-乙酰氧基-α-甲基-N,N'-二乙酰基丙二酰胺的方法,其中氢氰酸或氰化物在第一步中与乙酸酐反应,然后在第二步中,如此获得的反应混合物用乙酸 在酸催化剂存在下,其中第一步是在催化剂存在下进行的,该催化剂基于阴离子交换树脂,其中官能团是季铵或叔胺,如α-乙酰氧基-α-甲基-N,N ' - 二乙酰基马来酰胺作为漂白和清洁组合物中的活化剂非常有用,因此在较低温度下活性较高。

    Process for the purification of sulfuric acid by-product from boron
trifluoride synthesis
    5.
    发明授权
    Process for the purification of sulfuric acid by-product from boron trifluoride synthesis 失效
    从三氟化硼合成中纯化硫酸副产物的方法

    公开(公告)号:US4520006A

    公开(公告)日:1985-05-28

    申请号:US552480

    申请日:1983-11-17

    IPC分类号: C01B17/90

    CPC分类号: C01B17/90

    摘要: A process for the purification of by-product sulfuric acid resulting from the synthesis of boron trifluoride, wherein the ratio of fluorine to boron is three or more, which process comprises entraining the by-product acid in an inert gas, the process being characterized in that before entrainment the anhydrous sulfuric acid is diluted with water in a proportion of from about one to about ten percent by weight of water with respect to the acid to be treated, the temperature being maintained above 90.degree. C., the sulfuric acid obtained containing less than 0.003% fluorine and less than 0.005% boron, so that the quality is substantially equivalent to a sulfuric acid directly obtained by the oxidation of sulfur.

    摘要翻译: 用于纯化由合成三氟化硼产生的副产物硫酸的方法,其中氟与硼的比例为三或更多,该方法包括将惰性气体中的副产物酸夹带,该方法的特征在于 在夹带之前,无水硫酸用水以相对于待处理的酸的约1至约10重量%的比例稀释,温度保持在90℃以上,所得硫酸 小于0.003%的氟和小于0.005%的硼,使得其质量基本上等于通过硫的氧化直接获得的硫酸。