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    91.
    发明专利
    未知

    公开(公告)号：NO136925C

    公开(公告)日：1977-11-30

    申请号：NO2972

    申请日：1972-01-07

    Applicant: HOECHST AG

    Inventor： FERNHOLZ HANS ,  WUNDER FRIEDRICH ,  SCHMIDT HANS-JOACHIM

    IPC: C07C69/14 ,  B01J23/44 ,  B01J32/00 ,  B01J35/10 ,  C07C67/00 ,  C07C69/15 ,  C07C67/05

    Abstract: 1373272 Oxidation catalyst FARBWERKE HOECHST AG 6 Jan 1972 [8 Jan 1971] 656/72 Heading B1E [Also in Division C2] In a process for the oxacylation of olefins in the gaseous phase a supported catalyst is used comprising a palladium compound and a carrier having a specific surface in the range of from 40 to 350 m 2 /g and a total pore volume of from 0.4 to 1.2 ml/g, the carrier having less than 10% of micropores with a diameter below 30Š calculated on the total pore volume. Catalystss exemplified are (1) palladium, cadmium and potassium acetates in acetic acid impregnated into silicic acid; (2) palladuim, bismuth and potassium acetates, and barium acetoaurate, in acetic acid, impregnated into silicic acid. In Examples ethylene in the presence of acetic acid and oxygen is oxidised to vinyl acetate; propylene similarly gives allyl acetate; isobutylene gives methallyl acetate; propylene in the presence of propionic acid and oxygen gives allyl propionate.

    OXACYLATION OF OLEFINS
    93.
    发明专利
    OXACYLATION OF OLEFINS 未知

    公开(公告)号：AU3754472A

    公开(公告)日：1973-07-05

    申请号：AU3754472

    申请日：1972-01-04

    Applicant: HOECHST AG

    Inventor： FERNHOLZ HANS ,  WUNDER FRIEDRICH ,  SCHMIDT HANS-JOACHIM

    IPC: C07C69/14 ,  B01J23/44 ,  B01J32/00 ,  B01J35/10 ,  C07C67/00 ,  C07C69/15 ,  B01J11/16 ,  B01J11/82

    Abstract: 1373272 Oxidation catalyst FARBWERKE HOECHST AG 6 Jan 1972 [8 Jan 1971] 656/72 Heading B1E [Also in Division C2] In a process for the oxacylation of olefins in the gaseous phase a supported catalyst is used comprising a palladium compound and a carrier having a specific surface in the range of from 40 to 350 m 2 /g and a total pore volume of from 0.4 to 1.2 ml/g, the carrier having less than 10% of micropores with a diameter below 30Š calculated on the total pore volume. Catalystss exemplified are (1) palladium, cadmium and potassium acetates in acetic acid impregnated into silicic acid; (2) palladuim, bismuth and potassium acetates, and barium acetoaurate, in acetic acid, impregnated into silicic acid. In Examples ethylene in the presence of acetic acid and oxygen is oxidised to vinyl acetate; propylene similarly gives allyl acetate; isobutylene gives methallyl acetate; propylene in the presence of propionic acid and oxygen gives allyl propionate.

    96.
    发明专利
    未知

    公开(公告)号：MX9301994A

    公开(公告)日：1994-06-30

    申请号：MX9301994

    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 ,  B01J23/96

    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.

    99.
    发明专利
    未知

    公开(公告)号：MX9203016A

    公开(公告)日：1992-12-01

    申请号：MX9203016

    申请日：1992-06-18

    Applicant: HOECHST AG

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

    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

    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
    100.
    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.

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