Silver-containing supported catalysts and catalyst intermediates

Details Silver-containing supported catalysts and catalyst intermediates Silver-containing supported catalysts and catalyst intermediates

1999-01-26

2000-07-11

Wood, Elizabeth D.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502344, 502348, 549512, 549513, 549518, 549523, 549524, 549534, 549537, B01J 2350, B01J 2302, C07D30103, C07D30110, C07D30304

Patent

active

060872993

ABSTRACT:
The present invention relates to silver-containing and optionally promoter-containing supported catalysts and catalyst intermediates, processes for their preparation and their use for preparing alkylene oxides by oxidation of alkenes with oxygen. The catalysts are prepared by treatment of a support with a lactic acid containing silver ions, nitrate ions and optionally promoter metal ions, drying, predecomposition in a virtually oxygen-free atmosphere and subsequent activation by heating in an oxygen-containing atmosphere while precisely controlling the temperature conditions and the feeding-in of oxygen. The catalyst intermediates obtainable by treatment, drying and only predecomposition can be activated in a temporally and physically separate process step to form the actual catalysts. Suitable promoters are alkaline earth metal compounds and/or alkali metal compounds. High activities and high selectivities are achieved when using the catalysts of the invention for preparing alkylene oxides.

REFERENCES:
patent: 2404438 (1946-07-01), Evans et al.
patent: 4066575 (1978-01-01), Winnick
patent: 4305844 (1981-12-01), Vangermain et al.
patent: 4400308 (1983-08-01), Alter et al.
patent: 4908343 (1990-03-01), Bhasin
patent: 5173469 (1992-12-01), Wunde et al.
patent: 5281728 (1994-01-01), Wunde et al.
patent: 5625084 (1997-04-01), Pitchai et al.
Ralph Landau and Rex E. Lidow, Ethylene Oxide, Chapter 7 in Ethylene and its Industrial Derivatives, Ed. S. A. Miller and Ernest Benn, London, pp. 513-638 London (1963). No Month Available.
D. J. Hucknall, The Catalytic Oxidation of Ethylene, Chapter 2 in Selective Oxidation of Hydrocarbons, Academic Press, London, pp. 6-22 (1974). No Month Available.
McNaught, Kemball and Leach, Exchange Reactions with D.sub.2 O, pp. 100-105, and A. Ekstrom, G.E. Batley, and D.A. Johnson, Studies of Topochemical Heterogeneous Catalysis, pp. 106-114, both in Journal of Catalysis, vol. 34, 100-114 (1974). No Month Available.
Stephen Brunauer, P.H. Emmett, and Edward Teller, Adsorption of Gases in Multimolecular Layers, in The Journal of the American Chemical Society, vol. 60, pp. 309-316 (1938). No Month Available.
Derwent WPAT English Abstract for DE 23 00 512 (See Ref. D) No Dates for Abstracts.
Derwent WPAT English Abstract for DE 19 20 976 (See Ref. E) No Dates for Abstracts.
Derwent WPAT English Abstract for DE 27 33 688 (See Refs. C and F) No Dates for Abstracts.
Derwent WPAT English Abstract for EP 38 446 No Dates for Abstracts.

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