Metal treatment – Stock – Titanium – zirconium – or hafnium base
Patent
1990-05-04
1990-11-27
Morris, Theodore
Metal treatment
Stock
Titanium, zirconium, or hafnium base
148 13, 148133, 148425, 502325, 502349, B01J 2376, B01J 27185, C22C 1907, C22C 1600
Patent
active
049733699
ABSTRACT:
The specification discloses an alloy catalyst for oxidation of hydrogen which is prepared by heat treating a material comprising an amorphous alloy represented by the formula: Zr.sub.x Co.sub.(100-x) (wherein 10 atomic %.ltoreq..times..ltoreq.80 atomic %), according to the following three-steps in an oxidizing atomsphere: first heat-treatment step at a temperature at which the foregoing alloy stably exists as an amorphous single phase; second heat-treatment step at a temperature at which the alloy exists as a mixed phase of a metastable phase and an amorphous phase; and third-heat treatment step at a temperature at which the alloy is entirely transformed into a crystalline phase. The alloy catalyst of the present invention is a highly active catalyst for oxidation of hydrogen and exhibits a superior catalytic efficiency especially in catalytic combustion of hydrogen and in deoxidation and dehydrogenation of a gas mixture of hydrogen and oxygen.
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Lunin et al., "Effect of Composition on the Catalytic Properties of Zirconium-Cobalt Intermetallic Compounds for the Hydrogenation of Carbon Monoxide", Inv. A Kad. Nauk SSSR, Khim., Apr., 1985, Metals Ab. #85-340980.
Fukui Hideo
Hirono Hatsuo
Inoue Akihisa
Kimura Hisamichi
Masumoto Tsuyoshi
Masumoto Tsuyoshi
Morris Theodore
Schumaker David
Yoshida Kogyo K.K.
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