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    PROCESS FOR PREPARING 1,4-BUTANEDIOL BY CATALYTIC HYDROGENATION OF 1,4-BUTINEDIOL
    12.
    发明专利
    PROCESS FOR PREPARING 1,4-BUTANEDIOL BY CATALYTIC HYDROGENATION OF 1,4-BUTINEDIOL 未知

    公开(公告)号：CA2260810C

    公开(公告)日：2005-05-10

    申请号：CA2260810

    申请日：1997-09-23

    Applicant: BASF AG

    Inventor： KAIBEL GERD ,  PINKOS ROLF ,  WULFF-DORING JOACHIM ,  BROCKER FRANZ JOSEF ,  BECKER RAINER

    IPC: B01J25/02 ,  B01J8/02 ,  B01J8/06 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  B01J19/26 ,  C07B61/00 ,  C07C29/17 ,  C07C31/20

    Abstract: The invention concerns a process for preparing 1,4-butanediol by continuous catalytic hydrogenation of 1,4-butinediol in that 1,4-butinediol is reacted with hydrogen in the liquid continuous phase in th e presence of a heterogeneous hydrogenation catalyst at temperatures of between 20 and 300 .degree.C, a pressure of between 1 and 20 0 bar and values of the liquid-side mass transfer coefficients k L a, relative to the volume, of between 0.1 s-1 and 1s-1, a) with a catalyst suspended in the reaction medium, wherein, when a packed bubble column is used, it is operated in the upwards mode and at a ratio of the amount of gas leaving the reaction vessel to the amount fed thereto of between 0.99:1 and 0.4:1, or b) is guided upwards in parallel flow throug h a fixed bed reactor operated in the circulating gas mode, the ratio between the amount of gas fed to the reaction vessel and the amount of gas leaving the latter being maintained between 0.99:1 and 0.4:1.

    13.
    发明专利
    未知

    公开(公告)号：DE50103263D1

    公开(公告)日：2004-09-16

    申请号：DE50103263

    申请日：2001-12-07

    Applicant: BASF AG

    Inventor： BORCHERT HOLGER ,  SCHLITTER STEPHAN ,  FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  STEIN FRANK ,  RAHN RALF-THOMAS ,  WECK ALEXANDER ,  KAIBEL GERD

    IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33

    Abstract: The present invention relates to a process for the gas-phase hydrogenation of C4-dicarboxylic acids and/or their derivatives over a catalyst based on copper oxide to give substituted or unsubstituted gamma-butyrolactone and/or tetrahydrofuran, which comprises, which a first reaction zone in which the C4-dicarboxylic acid and/or its derivatives is/are reacted to give a mixture comprising a substituted or unsubstituted gamma-butyrolactone as main product and a subsequent second reaction zone in which the substituted or unsubstituted gamma-butyrolactone present in the mixture from the first hydrogenation step is reacted at a temperature lower than the temperature in the first hydrogenation step to give substituted or unsubstituted tetrahydrofuran.

    18.
    发明专利
    未知

    公开(公告)号：DE10224759A1

    公开(公告)日：2003-12-18

    申请号：DE10224759

    申请日：2002-06-04

    Applicant: BASF AG

    Inventor： HAAKE MATHIAS ,  KAIBEL GERD

    IPC: B01J19/32 ,  B01J35/04 ,  B01J35/06 ,  B01D3/00

    Abstract: The packing which fills the column completely is formed by layering or winding two or more differently structured webs of ceramic, plastic or carbon made non-woven material which is chemically and mechanically stable under the processing conditions of distillation or reactive distillation.

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