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    Preparation of inorganic fluoride-free perfluoroalkane sulphonates
    11.
    发明授权
    Preparation of inorganic fluoride-free perfluoroalkane sulphonates 失效
    无机氟化物全氟烷烃磺酸盐的制备

    公开(公告)号：US3919295A

    公开(公告)日：1975-11-11

    申请号：US45487574

    申请日：1974-03-26

    Applicant: BAYER AG

    Inventor： WECHSBERG MANFRED ,  NIEDERPRUM HANS

    IPC: C07C309/06 ,  C07C20060101 ,  C07C67/00 ,  C07C301/00 ,  C08K5/42 ,  C08L69/00 ,  C07C129/00 ,  C07C143/02

    CPC classification number: C07C309/00

    Abstract: In the preparation of a fluoride-free salt of a perfluoroalkane sulphonic acid of the formula RFSO3H, in which RF is a perfluoroalkane radical containing 1 to about 10 carbon atoms, wherein the corresponding perfluoroalkane sulphonyl fluoride is subjected to alkaline hydrolysis in liquid medium to produce an inorganic fluoride along with the perfluoroalkane sulphonic acid, the improvement which comprises adding to the hydrolysis mixture cations which form insoluble fluorides, whereby the insoluble fluorides of said cations precipitate out from the liquid medium having the perfluoroalkane sulphonate dissolved therein, separating the precipitate from the liquid medium, and thereafter isolating the perfluoroalkane sulphonate from the liquid medium. Advantageously the additive is calcium oxide and/or hydroxide.

    Abstract translation: 在制备RFSO 3 H的全氟烷基磺酸的无氟盐的盐的制备中，其中RF是含有1至约10个碳原子的全氟烷烃基团，其中相应的全氟烷基磺酰氟在液体介质中进行碱水解以产生 无机氟化物与全氟烷烃磺酸一起的改进包括向水解混合物中加入形成不溶性氟化物的阳离子，由此所述阳离子的不溶性氟化物从溶解有全氟烷烃磺酸盐的液体介质中沉淀出来，将沉淀物与 液体介质，然后从液体介质中分离全氟烷烃磺酸盐。 有利地，添加剂是氧化钙和/或氢氧化物。

    Process for the production of fluorochlorophosgene
    17.
    发明授权
    Process for the production of fluorochlorophosgene 失效
    生产荧光素的方法

    公开(公告)号：US3595763A

    公开(公告)日：1971-07-27

    申请号：US3595763D

    申请日：1968-10-09

    Applicant: BAYER AG

    Inventor： VOSS PETER ,  NIEDERPRUM HANS

    IPC: C01B32/80 ,  B01K3/00

    CPC classification number: C01B32/00 ,  C01B32/70 ,  C01B32/80

    Abstract: PROCESS FOR THE PRODUCTION OF CARBONYL FLUORIDE OR CARBONYL CHLOROFLUORIDE BY ELECTROLYZING CARBONYL DIXHLORIDE OR CARBON MONOXIDE OPTIONALLY IN THE PRESENCE OF CARBONYL CHLORIDE, CHLORINE OR CHLORINE DONORS IN ANHYDROUS HYDROFLUORIDE ACID AT A CELL VOLTAGE OF FROM 4 TO 8 VOLTS AND AT A TEMPERATURE OF FROM -20 TO 20*C., THE CARBONYL FLUORIDE OR CARBONYL CHLOROFLUORIDE BEING REMOVED FROM THE REACTION GASES LEAVING THE ELECTROLYSIS CELL BY COOLING.

    2,2,5,5-tetramethyl-2,5-disila-1,3-dioxolan and process therefor
    19.
    发明授权
    2,2,5,5-tetramethyl-2,5-disila-1,3-dioxolan and process therefor 失效
    2,2,5,5-四甲基-2,5-二去氧-1,3-二氧杂环己烷及其过程

    公开(公告)号：US3444228A

    公开(公告)日：1969-05-13

    申请号：US3444228D

    申请日：1966-07-06

    Applicant: BAYER AG

    Inventor： SIMMLER WALTER ,  NIEDERPRUM HANS ,  SATTLEGGER HANS

    IPC: C07F7/08 ,  C07F7/18 ,  C07F7/02

    CPC classification number: C07F7/0841

    Abstract: 2,2,5,5 - Tetramethyl - 2,5 - disila - 1,3 - dioxolan of the formula may be prepared by two methods. One method comprises heating a mixture of equimolar amounts of 1,3 - di - (hydroxymethyl) - tetramethyldisiloxane and 1,3 - di(bromomethyl)-tetramethyl disiloxane and excess methylamine until salt precipitation is complete, removing the nitrogen compounds from the mixture, adding p-toluene sulphonic acid as catalyst, distilling under reduced pressure and recovering the product as the distilate. The second method comprises heating a mixture of equimolar amounts of dimethyl - (acetoxymethyl)-acetoxysilane and dimethyldiethoxysilane, 5-20 fold molar amount of methanol and p-toluene sulphonic acid as catalyst, distilling off methanol, ethanol and methyl acetate, and then distilling under reduced pressure and recovering the product as the distillate. Hydrolysis of the product alone gives 1,7-di-(hydroxymethyl)-octamethyltetrasiloxane and cohydrolysis with organoalkoxysilanes gives organopolysiloxanes with terminal hydroxymethyl groups. Copolymerization with trioxan gives polyoxymethylenes with siloxane segments.

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