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    PREPARATION OF VINYLSILANES
    42.
    发明专利
    PREPARATION OF VINYLSILANES 未知

    公开(公告)号：CA2353121A1

    公开(公告)日：2002-01-18

    申请号：CA2353121

    申请日：2001-07-16

    Applicant: BASF AG

    Inventor： PREISS THOMAS ,  HENKELMANN JOCHEM ,  FRIEDRICH HOLGER

    IPC: C07B61/00 ,  C07F7/14 ,  C07F7/18 ,  C08F4/06 ,  C08F4/42

    Abstract: In the process for the preparation of vinylsilanes by reacting acetylenic hydrocarbons with silanes which have at least one silicon-bonded hydrogen atom in the liquid phase in the presence of a catalyst, the silane is added to the liquid phase. In particular, the reaction is carried out at superatmospheric pressure, and the spent acetylenic hydrocarbon is replenished during the reaction while maintaining a pressure which is constant during the entire reaction.

    Method for producing alkali methylates
    44.
    发明专利
    Method for producing alkali methylates 未知

    公开(公告)号：AU3008501A

    公开(公告)日：2001-06-18

    申请号：AU3008501

    申请日：2000-12-08

    Applicant: BASF AG

    Inventor： GUTH JOSEF ,  FRIEDRICH HOLGER ,  STERZEL HANS-JOSEF ,  KAIBEL GERD ,  BURKART KIRSTEN ,  HOFFMANN ELKE

    IPC: B01D1/28 ,  C07C29/70 ,  C07C29/80 ,  C07C31/30

    Abstract: Alkali metal methoxides are prepared from aqueous alkali metal hydroxide, which may have been admixed with methanol, and methanol in a reaction column having at least 5, preferably from 15 to 30, theoretical plates between the feed point for the aqueous alkali metal hydroxide and the feed point for the methanol. The gaseous methanol/water mixture formed in the reaction is fractionated in a rectification column. In one variant of the invention, the trays chosen for the reaction column configured as a bubble cap tray, valve tray or sieve tray column are trays in which not more than 5%, preferably

    METHOD FOR PRODUCING HIGHLY PURE LITHIUM SALTS
    45.
    发明专利
    METHOD FOR PRODUCING HIGHLY PURE LITHIUM SALTS 未知

    公开(公告)号：CA2322544A1

    公开(公告)日：1999-09-10

    申请号：CA2322544

    申请日：1999-03-01

    Applicant: BASF AG

    Inventor： FRIEDRICH HOLGER ,  LEUTNER BERND ,  PFEFFINGER JOACHIM

    IPC: C01B25/30 ,  B01J39/04 ,  C01D15/04 ,  C01D15/08 ,  C01D15/10

    Abstract: The invention relates to a method for producing a highly pure lithium salt using lithium carbonate. Said method comprises the following steps: A: treating a mixture comprising lithium carbonate and water with CO2 to produce an aqueous mixture containing lithium hydrogencarbonate; B: passing the aqueous mixture containing lithium hydrogencarbonate through an ion-exchange module; C: precipitating out the lithium carbonate from the aqueous mixture containing lithium hydrogencarbonate obtained in step B after treatment with the ion-exchange module and D: reprocessing the precipitated lithium carbonate or converting the precipitated lithium carbonate into another highly pure lithium salt.

    46.
    发明专利
    未知

    公开(公告)号：NO975601L

    公开(公告)日：1998-06-05

    申请号：NO975601

    申请日：1997-12-03

    Applicant: BASF AG

    Inventor： FRIEDRICH HOLGER ,  HOPPE KLAUS-DIETER ,  LEUTNER BERND ,  SCHLOFER DIETER ,  HECKY KURT

    IPC: C25B13/00 ,  C25B15/00 ,  C25B13/08 ,  C25B1/46

    Abstract: Modification of the cross-flow resistance of a diaphragm based on fibrous material comprises treating the diaphragm, during or after manufacture, with a dispersion of a component (I) containing fluorine and optionally a solution containing a zirconium dioxide (ZrO2) precursor. Preferably treatment is carried out during electrolysis. The amount of (I) used is 0.1-30 wt.% w.r.t. the fibrous material of the diaphragm and the amount applied is 30-500 g/m diaphragm surface area.

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