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    66.
    发明专利
    未知

    公开(公告)号：MX170938B

    公开(公告)日：1993-09-22

    申请号：MX1486989

    申请日：1989-02-09

    Applicant: HOECHST AG

    Inventor： WUNDER FRIEDRICH ,  ROSCHER GUNTER ,  EICHLER KLAUS

    IPC: C07C67/055 ,  B01J23/52 ,  B01J23/60 ,  B01J23/66 ,  B01J31/04 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C69/15

    Abstract: A process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst which contains palladium and/or its compounds, and also, if desired, additionally gold and/or gold compounds, and also alkali metal compounds as activators and, if desired, additionally cadmium compounds, on a support. The support consists of cylindrical particles having curved end surfaces. The support material is aerogenic SiO2 or an aerogenic SiO2-Al2O3 mixture having a surface area of 50-250 m /g and a pore volume of 0.4-1.2 ml/g, which is formed to at least 50 % of pores having a diameter of 50-200 Angströms. … …

    67.
    发明专利
    未知

    公开(公告)号：NO931319D0

    公开(公告)日：1993-04-06

    申请号：NO931319

    申请日：1993-04-06

    Applicant: HOECHST AG

    Inventor： WIRTZ PETER ,  WUNDER FRIEDRICH ,  WOERNER KARL-FRED

    IPC: B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J37/02 ,  B01J37/34 ,  C07B61/00 ,  C07C67/055 ,  C07C69/15 ,  B01J

    Abstract: The invention relates to improved Pd/K/Au, Pd/K/Ba and Pd/K/Cd supported catalysts, the preparation thereof, and the use thereof for preparing vinyl acetate from ethylene, acetic acid and oxygen in the gas phase. These catalysts are prepared by atomising a solution of the corresponding metal salts by means of ultrasound and then applying it in such limited amounts and within such a limited time to the support particles and commencing the drying thereof, that the catalytically active metal salts cannot penetrate the support particles as far as their core but only an outer part of greater or lesser size.

    68.
    发明专利
    未知

    公开(公告)号：FI931556A0

    公开(公告)日：1993-04-06

    申请号：FI931556

    申请日：1993-04-06

    Applicant: HOECHST AG

    Inventor： WIRTZ PETER ,  WUNDER FRIEDRICH ,  WOERNER KARL-FRED

    IPC: B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J37/02 ,  B01J37/34 ,  C07B61/00 ,  C07C67/055 ,  C07C69/15

    Abstract: The invention relates to improved Pd/K/Au, Pd/K/Ba and Pd/K/Cd supported catalysts, the preparation thereof, and the use thereof for preparing vinyl acetate from ethylene, acetic acid and oxygen in the gas phase. These catalysts are prepared by atomising a solution of the corresponding metal salts by means of ultrasound and then applying it in such limited amounts and within such a limited time to the support particles and commencing the drying thereof, that the catalytically active metal salts cannot penetrate the support particles as far as their core but only an outer part of greater or lesser size.

    69.
    发明专利
    未知

    公开(公告)号：BR9006142A

    公开(公告)日：1991-09-24

    申请号：BR9006142

    申请日：1990-12-04

    Applicant: HOECHST AG

    Inventor： WUNDER FRIEDRICH ,  WIRTZ PETER ,  ROSCHER GUENTER ,  EICHLER KLAUS

    IPC: B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J35/10 ,  B01J37/00 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15

    Abstract: The invention relates to a process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst containing palladium and/or compounds thereof and, if desired, in addition gold and/or gold compounds and, as activators, alkali metal compounds and, if desired, in addition cadmium compounds on a support comprising SiO2 or an SiO2/Al2O3 mixture having a surface area of 50 - 250 m /g and a pore volume of 0.4 - 1.2 ml/g and whose particles have a particle size of 4 to 9 mm, 5 to 20% of the pore volume of the support being formed by pores having radii from 200 to 3000 ANGSTROM and 50 to 90% of the pore volume being formed by pores having radii from 70 to 100 ANGSTROM . The support particles are compacted by means of an Li salt, Mg salt, Al salt, Zn salt or Mn salt of a C2-C20-carboxylic acid or a mixture of such salts as binders.

    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    70.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYL ACETATE 未知

    公开(公告)号：AU6771890A

    公开(公告)日：1991-06-13

    申请号：AU6771890

    申请日：1990-12-04

    Applicant: HOECHST AG

    Inventor： WUNDER FRIEDRICH ,  WIRTZ PETER ,  ROSCHER GUNTER ,  EICHLER KLAUS

    IPC: B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J35/10 ,  B01J37/00 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15

    Abstract: The invention relates to a process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst containing palladium and/or compounds thereof and, if desired, in addition gold and/or gold compounds and, as activators, alkali metal compounds and, if desired, in addition cadmium compounds on a support comprising SiO2 or an SiO2/Al2O3 mixture having a surface area of 50 - 250 m /g and a pore volume of 0.4 - 1.2 ml/g and whose particles have a particle size of 4 to 9 mm, 5 to 20% of the pore volume of the support being formed by pores having radii from 200 to 3000 ANGSTROM and 50 to 90% of the pore volume being formed by pores having radii from 70 to 100 ANGSTROM . The support particles are compacted by means of an Li salt, Mg salt, Al salt, Zn salt or Mn salt of a C2-C20-carboxylic acid or a mixture of such salts as binders.

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