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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1076. HOGAN, J. P. (Phillips Petroleum Co.). Preconditioning Hydrocarbon-Synthesis Catalyst. United States Patent 2,644,829, July 7, 1953. Chem. Abs., vol. 47, 1953, p. 8995. Describes process for eliminating the undesirably high initial activity of Fischer-Tropsch-type catalysts. Fresh or regenerated catalyst is brought into contact with a mixture of H2 and CO at the desired reaction temperature, but at lower than normal pressure and space velocity. The pressure and space velocity are then increased slowly over a period of 5-15 hr. to the desired reaction conditions, when the reaction may be continued as usual. Thus a low reaction rate is maintained while the catalyst activity is high. |