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51 records (took 0.019 seconds)

    42.
    发明专利
    未知

    公开(公告)号：DE60204761T3

    公开(公告)日：2009-07-09

    申请号：DE60204761

    申请日：2002-03-04

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： HAAS THOMAS ,  HOFEN WILLI ,  SAUER JOERG ,  THIELE GEORG

    IPC: C07D301/12 ,  C07D303/04

    Abstract: A process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, involves passing the reaction mixture through a fixed catalyst bed in down-flow operation mode and partially removing the heat during the course of the reaction.

    43.
    发明专利
    未知

    公开(公告)号：DE102007007185A1

    公开(公告)日：2008-08-14

    申请号：DE102007007185

    申请日：2007-02-09

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： BADE STEFAN ,  SELIGER BEATE ,  SCHLADERBECK NORBERT ,  SAUER JOERG

    IPC: C07F7/18

    Abstract: The present invention relates to a process for preparing glycidyloxy-alkylalkoxysilanes of the general formula (I) (R″)O—CnH2nSi(R′)m(OR)3-m(I) in which R and R′ groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms, n is 1, 2, 3, 4, 5, 6, 7 or 8 and m is 0, 1, 2 or 3, and R″ is an H2C(O)CH— or H2C(O)CHCH2— group, by reacting (i) a functionalized alkene of the general formula (II) (R″)O—CnH2n-1(II) in which R″ is an H2C(O)CH— or H2C(O)CHCH2— group and n is 1, 2, 3, 4, 5, 6, 7 or 8 with (ii) at least one hydroalkoxy-silane of the general formula (III) HSi(R′)m(OR)3-m (III) in which R and R′ groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms and m is 0, 1, 2 or 3, in the presence (iii) of at least one homogeneous catalyst, (iv) of at least one solvent and/or of a diluent and (v) of at least one promoter.

    PROCESS FOR THE EPOXIDATION OF OLEFINS
    44.
    发明专利
    PROCESS FOR THE EPOXIDATION OF OLEFINS 未知

    公开(公告)号：CA2439994A1

    公开(公告)日：2002-10-31

    申请号：CA2439994

    申请日：2002-03-02

    Applicant: DEGUSSA ,  UHDE GMBH

    Inventor： HAAS THOMAS ,  HOFEN WILLI ,  SAUER JOERG ,  THIELE GEORG

    IPC: C07D301/12 ,  C07D303/04

    Abstract: The invention described herein relates to a process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, wherein the reaction mixture is passed through a fixed catalyst bed within a reactor equipped with cooling means while maintaining a temperature profile within the reactor such that the cooling medium temperature of the cooling means is at least 40~C and the maximum temperature within the cataly st bed is 60~C at the most.

    47.
    发明专利
    未知

    公开(公告)号：DE19953185A1

    公开(公告)日：2001-05-23

    申请号：DE19953185

    申请日：1999-11-05

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS ,  GLENNEBERG JUERGEN ,  WAGNER RUDOLF ,  CREUTZ MATTHIAS ,  SAUER JOERG ,  VANHEERTUM RUDOLF

    IPC: B01J8/02 ,  B01J10/00 ,  B01J23/44 ,  B01J35/02 ,  C01B15/023

    Abstract: The hydrogenation step in the anthrachinone process for producing hydrogen peroxide in a hydrogenation reactor performed on a solid bed catalyst from particle-shaped catalyst is known in prior art. According to the invention, the residence time of a catalyst is increased by transporting working solution containing reaction support material and transporting a hydrogen-containing gas phase as a mixture from the downside to the upside through a hydrogenation reactor. The empty pipe velocity of the working solution is 0.05 to 100 m/h, in particular 10 to 50 m/h.

    49.
    发明专利
    未知

    公开(公告)号：BR9706465A

    公开(公告)日：1999-06-01

    申请号：BR9706465

    申请日：1997-12-26

    Applicant: DEGUSSA

    Inventor： HOFEN WILLI ,  BOECK WOLFGANG ,  RAUTENBERG STEPHAN ,  SAUER JOERG ,  ARNTZ DIETRICH ,  GOEDECKE RALF ,  TAUGNER WOLFGANG ,  SONNENSCHEIN RAYMUND

    IPC: B01J21/04 ,  B01J23/30 ,  C07B61/00 ,  C07C319/08 ,  C07C321/04

    Abstract: A process for the continuous production of methyl-mercaptan (I) comprises (i) reacting a mixture of methanol and hydrogen sulphide (H2S) in the vapour phase at 300-500 degrees C and 5-15 bar on an alumina-based catalyst bed and (ii) separating (I) from the gas mixture obtained by absorption and distillation, with recycling of unreacted methanol and H2S, removal of inert gas and waste water, and replacement of used methanol and H2S. The starting gas mixture is obtained by (a) compressing fresh H2S to an intermediate pressure (P1) with addition of liquid methanol, (b) adding the recycled H2S and compressing the mixture to operating pressure (P2), (c) adding more methanol in the form of vapour to give a compressed mixture with a mol ratio of (H2S):(methanol) = 1.1-3, (d) preheating the gas mixture to 150-200 degrees C, (e) heating to reaction temperature using the heat of reaction released on the catalyst and (f) reaction on the catalyst bed.

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