Thermally stable coprecipitated catalysts useful for methanation

Details Thermally stable coprecipitated catalysts useful for methanation Thermally stable coprecipitated catalysts useful for methanation

1977-01-10

1978-11-07

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252373, 252466J, 252463, 423655, 423656, C07C 104, C07C 110

Patent

active

041246292

ABSTRACT:
Catalysts having a high degree of thermal stability, comprising alumina and one or more of the iron group metals are prepared from aqueous solutions containing a dissolved aluminum salt, a salt of at least one of the iron group metals and a delayed precipitant such as urea. The solution is heated to a temperature sufficient to hydrolyze the delayed precipitant with resultant liberation of ammonia and carbon dioxide homogeneously throughout the solution, until the pH of the solution rises sufficiently to effect coprecipitation of the metal salts as hydroxides and/or carbonates. The resulting coprecipitate is then recovered, washed, dried, shaped and calcined in conventional fashion to obtain a final product which, after hydrogen-reduction is very active, and displays much greater thermal stability than corresponding prior art catalysts prepared by non-homogeneous coprecipitation with alkaline, ionic reagents such as sodium carbonate, ammonium hydroxide, or ammonium carbonate. The nickel-containing catalysts are particularly useful for methanation, but they are all useful in a variety of other reactions.

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patent: 3642460 (1972-02-01), Thompson
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patent: 3876557 (1975-04-01), Bland

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