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    41.
    发明专利
    未知

    公开(公告)号：BR0102897A

    公开(公告)日：2002-04-02

    申请号：BR0102897

    申请日：2001-07-16

    Applicant: DEGUSSA

    Inventor： ALIG ALFRED ,  BATZ-SOHN CHRISTOPH ,  DESCHLER ULRICH ,  MICHEL RUDOLF ,  MUENZENBERG JOERG ,  SONNENSCHEIN RAYMUND ,  WILL WERNER ,  ZEZULKA GERD RAINHARD ,  RUETZEL KARL-HEINZ

    IPC: C07F7/08 ,  C07F7/18 ,  C08G77/28

    Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2Sx (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2- (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.

    PROCESS FOR PRODUCING ORGANIC SYLILE ALKYL POLYSULPHANES
    43.
    发明专利
    PROCESS FOR PRODUCING ORGANIC SYLILE ALKYL POLYSULPHANES 未知

    公开(公告)号：HU0100921A2

    公开(公告)日：2001-12-28

    申请号：HU0100921

    申请日：2001-02-28

    Applicant: DEGUSSA

    Inventor： MICHEL RUDOLF ,  DR MUENZENBERG JOERG ,  WILL WERNER

    IPC: C07F7/18

    Abstract: Production of organosilylalkyl polysufides (I) by reacting an organosilylalkyl halide (II) with an anhydrous ionic sulfide (III) and elemental sulfur comprises adding (III) to a suspension of elemental sulfur and (II) in a polar organic solvent. Production of organosilylalkyl polysufides of formula (I) by reacting an organosilylalkyl halide of formula (II) with an anhydrous ionic sulfide of formula (III) and elemental sulfur comprises adding (III) to a suspension of elemental sulfur and (II) in a polar organic solvent: (R 1>R 2>R 3>SiR 4>)S x (I) , R 1>R 2>R 3>SiR 4>X (II) and M 2S (III) R 1>-R 3>1-8C alkyl, 1-8C alkoxy or aryl, at least one being alkoxy; R 4>1-8C alkylene or (CH 2) n-C 6H 4-(CH 2) n; n : 1-4; x : more than 1; X : Cl, Br or I; M : an alkali metal or ammonium cation or half an alkaline earth metal or zinc cation.

    48.
    发明专利
    未知

    公开(公告)号：AT506323T

    公开(公告)日：2011-05-15

    申请号：AT06763616

    申请日：2006-06-09

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  LACH HEINZ ,  WILL WERNER

    IPC: C01F7/02 ,  C09K23/00

    Abstract: Aluminum oxide dispersion, which is stable in a pH range 5 from 5 to 9 and has an aluminum oxide content of at least 40 wt. %, obtainable by dispersing pyrogenically produced aluminum oxide particles in an aqueous phase, wherein one or several at least dibasic hydroxycarboxylic acids present dissolved in the dispersion and at least one salt of a 10 dialkali metal hydrogen phosphate and/or alkali metal dihydrogen phosphate are added to the aqueous phase each mutually independently in a quantity of 0.3-3×10-6 mol/m2 of aluminum oxide specific surface area.

    50.
    发明专利
    未知

    公开(公告)号：AT485238T

    公开(公告)日：2010-11-15

    申请号：AT04725037

    申请日：2004-04-01

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER ,  SCHNEIDER GERRIT

    IPC: C01B13/14 ,  C01B33/141 ,  C01B33/26 ,  C01F7/02 ,  C03C1/00 ,  C09G1/02 ,  C09K3/14 ,  G09G1/02

    Abstract: Process for the production of an aqueous dispersion of pyrogenically produced metal oxide and metalloid oxide powders with a BET surface area of between 5 and 600 m2/g, with a metal oxide or metalloid oxide content in the dispersion of between 5 and 25 wt. %, comprising the following steps: water, which is optionally adjusted to pH values of between 2 and 4 by adding acids, is circulated from a receiving vessel via a rotor/stator machine, and metal oxide or metalloid oxide powder is introduced, using a feed device, into the shear zone between the slots in the rotor teeth and the stator slots, continuously or discontinuously and with the rotor/stator machine running, in a quantity such that a predispersion with a solids content of between 20 and 40 wt. % results, and, after all the metal oxide powder or metalloid oxide powder has been added, the feed device closes and shearing continues in such a way that the shear rate is in the range of between 10000 and 40000 s-1, and then, by dilution, the predispersion is adjusted to the desired solids content of the dispersion while maintaining the dispersing conditions.

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