Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-05-20
1978-02-14
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252466J, 252472, B01J 2914, B01J 2374
Patent
active
040737500
ABSTRACT:
This invention relates to a method for making supported nickel catalysts which are characterized as having the nickel in a highly dispersed state, the catalysts and use thereof in hydrogenation, reforming and hydrocarbon synthesis reactions, for example, Fischer-Tropsch reactions. Catalysts prepared by the method of the instant invention, wherein nonaqueous solutions are used in preparing the catalyst, are characterized as having a degree of dispersion of at least 10% greater than similar catalysts prepared by the prior art aqueous impregnation techniques and in some instances show an improved degree of dispersion of more than 50% over the catalysts prepared by the prior art methods. In the method of the instant invention the catalyst is prepared by slurrying a nickel metal precursor dissolved in a nonaqueous organic solvent with a high surface area support, for example, a refractory inorganic oxide, preferably selected from the group consisting of silica and alumina, removing the solvent to obtain a composite of said nickel metal precursor and said support and activating said composite by reducing in hydrogen at conditions sufficient to convert substantially all the nickel metal precursor to nickel metal. The nonaqueous solvent is preferably selected from the group consisting of aldehydes, ketones, ethers and organic nitrogen compounds, for example, acetone, acetonitrile, N,N-dimethyl formamide, hexamethyl phosphoramide, diethylether, tetrahydrofuran, dioxane, methylethyl ketone and acetaldehyde.
REFERENCES:
patent: 1997135 (1935-04-01), de Mahler
patent: 3535271 (1970-10-01), Fuller
patent: 3536632 (1970-10-01), Kroll
patent: 3553102 (1971-01-01), Rosinski et al.
patent: 3692701 (1972-09-01), Box
patent: 3868332 (1975-02-01), Carter et al.
Murrell Lawrence L.
Yates David J. C.
Allocca Joseph J.
Baran Robert J.
Exxon Research & Engineering Co.
Garvin Patrick P.
Wright William G.
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