Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1989-04-11
1990-09-25
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502303, 502304, 502306, 502324, 502327, 502328, 502341, B01J 2104, B01J 2310, B01J 2358, B01J 2364
Patent
active
049593390
ABSTRACT:
A heat-resistant noble metal catalyst having both of exceedingly superior heat-resistant property and a remarkable high activity at any temperature ranges of low, middle, and high, is provided having a heat-reistant noble metal catalyst consisting essentially of a composition having a formula A.sub.1-z C.sub.z B.sub.x D.sub.u Al.sub.12-y-u O.sub.19-.alpha., wherein A is at least one element selected from the group consisting of Ba, Ca and Sr, C is at least one element selected from the group consisting of K, Rb and rare earth elements, B is at least one element selected from the group consisting of Mn, Co, Fe, Ni, Cu and Cr, D is at least one element selected from the group consisting of Au, Ag and platinum group noble metals, z is a value in a range of 0-about 0.4, x is a value in a range of 0-about 4, y is a value in a range of x-2x, u is a value of not less than about 0.01, x+u is a value of not more than about 4, and .alpha. is a value which is determined by the values X, Y, Z and U of the respective elements, A, C, B and D and the values of x, y, z and u and is expressed as
REFERENCES:
patent: 4001143 (1977-01-01), McCann
patent: 4183829 (1980-01-01), Adachi
patent: 4248741 (1981-02-01), Wernli
patent: 4711872 (1987-12-01), Kato et al.
Catalysts and Chemicals Inc.
Shine W. J.
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