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    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    31.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYL ACETATE 未知

    公开(公告)号：AU629072B2

    公开(公告)日：1992-09-24

    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.

    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    32.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYL ACETATE 未知

    公开(公告)号：AU606502B2

    公开(公告)日：1991-02-07

    申请号：AU2970089

    申请日：1989-02-08

    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. … …

    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    33.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYL ACETATE 未知

    公开(公告)号：AU2970089A

    公开(公告)日：1989-08-10

    申请号：AU2970089

    申请日：1989-02-08

    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. … …

    37.
    发明专利
    未知

    公开(公告)号：ES2068600T3

    公开(公告)日：1995-04-16

    申请号：ES91913814

    申请日：1991-07-27

    Applicant: HOECHST AG

    Inventor： ROSCHER GUNTER

    IPC: C07F9/02 ,  C07F9/38

    Abstract: PCT No. PCT/EP91/01412 Sec. 371 Date Feb. 3, 1993 Sec. 102(e) Date Feb. 3, 1993 PCT Filed Jul. 27, 1991 PCT Pub. No. WO92/02524 PCT Pub. Date Feb. 20, 1992.Method of separating vinylphosphonic acid from crude mixtures. The invention relates to a method for separating vinylphosphonic acid from crude mixtures, the separation being carried out by extraction with alcohols and/or ketones, which in each case comprise at least 5 carbon atoms. According to the invention, vinylphosphonic acid can be obtained in high purity and good yield from highly contaminated crude mixtures.

    38.
    发明专利
    未知

    公开(公告)号：MX9301434A

    公开(公告)日：1994-01-31

    申请号：MX9301434

    申请日：1993-03-16

    Applicant: HOECHST AG

    Inventor： ROSCHER GUNTER

    IPC: C07D291/06

    Abstract: PCT No. PCT/EP93/00606 Sec. 371 Date Jun. 19, 1995 Sec. 102(e) Date Jun. 19, 1995 PCT Filed Mar. 16, 1993 PCT Pub. No. WO93/19055 PCT Pub. Date Sep. 30, 1993The invention relates to a process for the preparation of acesulfam salts by reaction of salts of amidosulfonic acid with diketene to give a salt of acetoacetamidosulfonic acid (I), ring closure by the action of at least about an equivalent amount of SO3, at least this ring closure reaction being carried out in the presence of a halogenated, aliphatic hydrocarbon as an inert solvent, treatment of the cyclization product with water and conversion of the resulting acesulfam-H (II) into the form of a non-toxic salt, which comprises, in the work-up by distillation of the resulting crude solvent, after removal of water and low-boilers and recovery of solvent sufficiently pure for reuse in the preparation of compounds (I) and/or (II), directly returning :he remaining, solvent-containing distillation residue, without further purification, into the system downstream of the reaction vessel for carrying out the ring closure reaction.

    39.
    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. … …

    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    40.
    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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