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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
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.
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公开(公告)号：NO931319L
公开(公告)日：1993-10-11
申请号：NO931319
申请日：1993-04-06
Applicant: HOECHST AG
Inventor： WIRTZ PETER , WUNDER FRIEDRICH , WOERNER KARL-FRED
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.
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3.发明专利
公开(公告)号：CA2071699A1
公开(公告)日：1992-12-22
申请号：CA2071699
申请日：1992-06-19
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 , B01J23/38 , B01J23/54
Abstract: ? HOE 91/F 188 of the disclosure: Carrier catalyst, process for its preparation, and its use for the preparation of vinyl acetate The invention relates to a process for the preparation of a catalyst which contains palladium and/or compounds thereof and alkali metal compounds, and additionally cadmium compounds and/or gold and/or compounds thereof, on support particles which have been pressed from SiO2 or an iO2-Al203 mixture with the aid of a binder which comprises a) washing the roasted support particles with an acid which does not react with SiO2 or SiO2-Al2O3 mixtures, until no further cations of the binder employed during pressing of the support particles are released from the support particles; b) then impregnating the support particles with palladium, and gold or cadmium; c) then bringing the impregnated support particles into contact with a solution of a base at least until the thickness of the nobel metal shell generated in this way on the support particles no longer changes substantially; and d) then impregnating the support particles with an alkali metal compound. A shell-like distribution of the palladium and if appropriate of the gold in the support particles is generated in this manner. Furthermore, the invention relates to a catalyst prepared in this way and to its use for the preparation of vinyl acetate.
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公开(公告)号：PL168402B1
公开(公告)日：1996-02-29
申请号：PL29486992
申请日：1992-06-11
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.
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5.发明专利
公开(公告)号：CA2128154A1
公开(公告)日：1995-01-17
申请号：CA2128154
申请日：1994-07-15
Applicant: HOECHST AG
Inventor： ABEL ROLAND , WOERNER KARL-FRED
Abstract: Surface impregnated catalyst, process for the production thereof, and use thereof or the preparation of vinyl acetate The invention relates to Pd/K/Au, Pd/K/Ba or Pd/K/Cd supported catalysts built up in the form of an outer layer, the production thereof and also the use thereof for preparing vinyl acetate from ethylene, acetic acid and oxygen in the gas phase. The catalysts specified are produced by impregnating the support particles, while mixing intimately, with a solution of salts of the corresponding elements and then drying the support particles immediately, with the dynamic viscosity of the solution being at least 0.003 Pa?s and the solution volume in impregnation being from 5 to 80% of the pore volume of the support particles.
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Patent Agency Ranking
公开(公告)号：NO931319A
公开(公告)日：1993-10-11
申请号：NO931319
申请日：1993-04-06
Applicant: HOECHST AG
Inventor： WIRTZ PETER , WUNDER FRIEDRICH , WOERNER KARL-FRED
CPC classification number: B01J37/343 , B01J23/58 , B01J23/60 , B01J23/66 , C07C67/055 , C07C69/01 , C07C69/15
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公开(公告)号：CA2128162A1
公开(公告)日：1995-01-17
申请号：CA2128162
申请日：1994-07-15
Applicant: HOECHST AG
Inventor： ABEL ROLAND , WOERNER KARL-FRED
Abstract: Surface impregnated catalyst, process for the production thereof, and use thereof for the preparation of vinyl acetate The invention relates to Pd/K/Au, Pd/K/Ba, or Pd/K/Cd supported catalysts having an impregnated layer structure, the production thereof and also the use thereof for preparing vinyl acetate from ethylene, acetic acid and oxygen in the gas phase. The catalysts specified are produced by spraying the support particles, while mixing intimately with a solution of salt of the corresponding elements in the form of drops having an average diameter of at least 0.3 mm or in the form of liquid jets and then drying the support particles immediately, with the dynamic viscosity of the solution being at least 0.003 Pa?s and the solution volume in spraying being from 5 to 80 % of the pore volume of the support particles.
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公开(公告)号：CA2128161A1
公开(公告)日：1995-01-17
申请号：CA2128161
申请日：1994-07-15
Applicant: HOECHST AG
Inventor： ABEL ROLAND , WOERNER KARL-FRED
Abstract: Surface impregnated catalyst, process for the production thereof, and use thereof for the preparation of vinyl acetate The invention relates to Pd/R/Au, Pd/R/Ba or Pd/R/Cd supported catalysts built up in the form of an outer layer, the production thereof and the use thereof for preparing vinylacetate from ethylene, acetic acid and oxygen in the gas phase. The specified catalysts are produced by impregnating the support particles with a solution of salts of the corresponding elements and then drying them, with the dynamic viscosity of the solution being at least 0.003 Pa?s and the solution volume in impregnation being more than 80 % of the pore volume of the support particles and the duration of the impregnation and also the time until commencement of the drying being selected 80 as to be sufficiently short for, after completion of the drying, the specified metal salts to be present in an outer layer of from 5 % to 80 % of the pore volume of the support particles.
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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.
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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
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.
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