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    Verfahren zur herstellung vinylacetat
    1.
    发明专利
    Verfahren zur herstellung vinylacetat 未知

    公开(公告)号：SG44750A1

    公开(公告)日：1997-12-19

    申请号：SG1996006902

    申请日：1992-06-17

    Applicant: HOECHST AG

    Inventor： WIRTZ PETER ,  WORNER KARL-FRED ,  WUNDER FRIEDRICH ,  EICHLER KLAUS ,  ROSCHER GUNTER ,  NICHOLAU LOAN

    IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07C

    Abstract: Prodn. of catalysts (I) involves (a) washing the ignited support particles with an acid which does not react with silica or alumina, until no more binder cations are washed out, (b) impregnating with Pd and Au or Cd, (c) contacting with a soln. of a base until there is no further change in the thickness of the noble metal layer produced on the particle surface and (d) impregnating with an alkali cpd. Catalyst contains Pd and/or Pd cpds. and alkali cpds., together with Cd cpds. and/or Au or Au cpds., on particles of a SiO2 or SiO2/Al2O3 substrate which is obtd. by pressing with the binder aid consisting of Li, Mg, Al, Zn, Fe and/or Mn 2-26C carboxylate(s), and igniting for 0.25-5 hrs. at 500-900 deg. C in oxgyen-contg. gas, to give a prod. with surface area 50-250 m2/g, pore vol. 0.4-1.2 ml/g and particle size 1-15mm, in which 5-20 vol. % of the pores have radius = 200-3000 Angstrom and 50-90 vol. % have radius = 70-100 Angstrom. Acid in (a) is pref. HCl, H2SO4, H3PO4 or HNO3, pref. HCl, the base in (c) is an alkali hydroxide, and a potassium cpd. is used in stage (d). Pref. (I) is obtd. by mixing glass microspheres (silica/alumina; at least 95 wt. % silica; obtd. by flame hydrolysis) with 10-20C Mg or Al carboxylate, pressing and igniting as above to give 5-7mm pellets, washing for 10-14 hours, with 10-20% HCl, drying impregnating with a soln. of PdCl2 and AuCl3 or Cd salt (chloride, nitrate etc.), precipitating with NaOH soln., impregnating with KOAc and drying; vinyl acetate prodn. is carried out at 120-200 deg. C and 1-20 bar, using a gas mixt. contg. not above 10 vol. % oxygen.

    Single-component alkali metal silicate cement composition
    3.
    发明专利
    Single-component alkali metal silicate cement composition 未知

    公开(公告)号：AU656650B2

    公开(公告)日：1995-02-09

    申请号：AU3204893

    申请日：1993-01-27

    Applicant: HOECHST AG

    Inventor： ERNST JOSEF ,  SEMMLER HANS JOACHIM ,  WIRTZ PETER

    IPC: C04B22/16 ,  C04B28/26 ,  C09D1/02 ,  C09J1/02

    Abstract: The invention relates to a dry, surfactant-free single-component alkali metal silicate cement composition containing as hardening agent condensed aluminum phosphate and at least one compound from the group comprising the ortho- and pyrophosphates of manganese, zinc, cobalt, iron(III) and chromium(III) and in addition containing the conventional components rounded quartz sand, clay, kieselguhr, mineral oil and solid powdered sodium water glass or potassium water glass.

    4.
    发明专利
    未知

    公开(公告)号：FI931556A

    公开(公告)日：1993-10-09

    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.

    5.
    发明专利
    未知

    公开(公告)号：BR9202328A

    公开(公告)日：1993-01-19

    申请号：BR9202328

    申请日：1992-06-19

    Applicant: HOECHST AG

    Inventor： WIRTZ PETER ,  WOERNER KARL-FRED DR ,  WUNDER FRIEDRICH DR ,  EICHLER KLAUS DR ,  ROSCHER GUENTER DR ,  NICOLAU IOAN DR

    IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07C69/75

    Abstract: Prodn. of catalysts (I) involves (a) washing the ignited support particles with an acid which does not react with silica or alumina, until no more binder cations are washed out, (b) impregnating with Pd and Au or Cd, (c) contacting with a soln. of a base until there is no further change in the thickness of the noble metal layer produced on the particle surface and (d) impregnating with an alkali cpd. Catalyst contains Pd and/or Pd cpds. and alkali cpds., together with Cd cpds. and/or Au or Au cpds., on particles of a SiO2 or SiO2/Al2O3 substrate which is obtd. by pressing with the binder aid consisting of Li, Mg, Al, Zn, Fe and/or Mn 2-26C carboxylate(s), and igniting for 0.25-5 hrs. at 500-900 deg. C in oxgyen-contg. gas, to give a prod. with surface area 50-250 m2/g, pore vol. 0.4-1.2 ml/g and particle size 1-15mm, in which 5-20 vol. % of the pores have radius = 200-3000 Angstrom and 50-90 vol. % have radius = 70-100 Angstrom. Acid in (a) is pref. HCl, H2SO4, H3PO4 or HNO3, pref. HCl, the base in (c) is an alkali hydroxide, and a potassium cpd. is used in stage (d). Pref. (I) is obtd. by mixing glass microspheres (silica/alumina; at least 95 wt. % silica; obtd. by flame hydrolysis) with 10-20C Mg or Al carboxylate, pressing and igniting as above to give 5-7mm pellets, washing for 10-14 hours, with 10-20% HCl, drying impregnating with a soln. of PdCl2 and AuCl3 or Cd salt (chloride, nitrate etc.), precipitating with NaOH soln., impregnating with KOAc and drying; vinyl acetate prodn. is carried out at 120-200 deg. C and 1-20 bar, using a gas mixt. contg. not above 10 vol. % oxygen.

    PROCESS FOR THE PREPARATION OF VINYL ACETATE
    6.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYL ACETATE 未知

    公开(公告)号：CA2031429A1

    公开(公告)日：1991-06-06

    申请号：CA2031429

    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: - - HOE 89/F 384 of the disclosure Process for the preparation of vinyl acetate 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 which contains palladium and/or its compounds and, if desired, additionally gold and/or gold compounds and which contains as activators alkali metal compounds and,if desired,additionally cadmium compounds on a support which is composed of SiO2 or an SiO2 Al2O3 mixture having a surface area of 50 - 250 m2/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 of pores having radii of 200 to 3000 .ANG. and 50 to 90% of the pore volume being formed of pores having radii of 70 to 100 .ANG.. The support particles are compressed with the aid of an Li, Mg, Al, Zn or Mn salt of a C2-C20 carboxylic acid or a mixture of such salts as binder.

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