Method for producing supported Raney nickel catalyst
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorsLaurance L. Oden, Philip E. Sanker, James H. Russell
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Abstract
A method for making a supported Raney nickel catalyst by coating a nickel substrate with aluminum or aluminum-nickel alloy, heat treating the coated substrate above the melting point of aluminum but below 1133.degree. C, quenching at a temperature below 854.degree. C to form NiAl.sub.3 as a solid phase in the substrate. The Raney nickel alloy coating is activated in the usual manner by leaching with sodium hydroxide solution.
Claims12
A process for making a Raney nickel catalyst comprising:
- dipping a nickel support or substrate into a bath comprising molten aluminum;
- removing the support from the bath of molten aluminum, the said support now being coated with a layer of aluminum to form a specimen;
- heat treating the specimen in the absence of oxygen at a temperature of from about 700.degree. to 1133.degree. C.;
- and
- quenching the heat treated specimen at a temperature of from about 640.degree. to 854.degree. C. in the absence of oxygen to form NiAl.sub.3 as a solid phase coating on the substrate;
- and leaching the coated substrate with sodium hydroxide solution to produce a supported Raney nickel catalyst.
The process for making a supported Raney nickel catalyst comprising the steps of:
- preheating a nickel support or substrate at from about 700.degree. C. to about 1133.degree. C. in a first molten salt bath;
- immersing said support in a bath comprising molten aluminum maintained at substantially the same temperature as the first salt bath;
- removing the support from said first molten salt bath whereby a continuous coating of aluminum on said support is obtained forming a specimen;
- heat treating the specimen in the said first salt bath;
- quenching the specimen in a second molten salt bath at a temperature of from about 640.degree. C. to 854.degree. C. to form NiAl.sub.3 as a solid phase coating on the support;
- and leaching the coated support with sodium hydroxide solution to produce a supported Raney nickel catalyst.
Dependencies are inferred from the claim text.