Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1977-12-01
1979-07-10
Shine, W. J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252447, 252455R, 252455Z, 252472, 260690, 585270, B01J 2104, B01J 2108, B01J 2112, B01J 2374
Patent
active
041607457
ABSTRACT:
The instant invention relates to a method for preparing high activity supported nickel catalysts. The method comprises the deposition of nickel nitrate on a carrier, typically an inert inorganic refractory oxide, by techniques known in the art followed by careful heating to a temperature of between 100.degree. to 270.degree. C., avoiding any excursions into temperatures beyond the stated maxima, in a flowing nonreactive gas atmosphere for a time sufficient to convert substantially all of the nickel nitrate into nickel oxide. When using an H.sub.2 containing atmosphere the maximum temperature is 220.degree. C. The supported nickel oxide resulting from the above procedure is then reduced to a supported nickel metal catalyst in a reducing atmosphere at a temperature ranging from about 230.degree. C. to 400.degree. C.
The instant invention also relates to a new class of supported nickel metal catalysts having a specific activity of at least twice the specific activities of prior art catalysts as determined for the hydrogenation of benzene. These catalysts comprise from 0.1 to 50 wt. % nickel on a support, preferably 0.5 to 20 wt. % nickel, most preferably about 17 wt. % nickel on a support, wherein the support is as defined above.
REFERENCES:
patent: 1268692 (1918-06-01), Dewar et al.
patent: 3202723 (1965-08-01), Thonon
patent: 3207702 (1965-09-01), Flank et al.
patent: 3622645 (1971-11-01), Carr et al.
patent: 3798279 (1974-03-01), Cessou et al.
patent: 3987099 (1976-10-01), Hockele et al.
Murrell Lawrence L.
Yates David J. C.
Allocca Joseph J.
Exxon Research & Engineering Co.
Shine W. J.
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