Catalyst carrier and catalyst using the same

Details Catalyst carrier and catalyst using the same Catalyst carrier and catalyst using the same

2005-07-22

2010-11-30

Vanoy, Timothy C (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S302000, C502S326000, C502S349000, C502S527110

Reexamination Certificate

active

07842642

ABSTRACT:
The catalyst carrier in accordance with the present invention is a catalyst carrier comprising a support containing an oxide and an element in group 3A of the periodic table, and a coating part covering at least a part of a surface of the support; wherein the coating part contains an element in group 3A of the periodic table; and wherein the element in group 3A contained in the coating part has a concentration higher than that of the element in group 3A contained in the support. In this case, even when a catalyst in which rhodium is supported by the catalyst carrier is used for a long time in a high temperature environment, the grain growth of rhodium particles can be suppressed, and the catalyst can fully be prevented from lowering its activity.

REFERENCES:
patent: 4843056 (1989-06-01), Matsumoto et al.
patent: 4923842 (1990-05-01), Summers
patent: 6294140 (2001-09-01), Mussmann et al.
patent: 2002/0115730 (2002-08-01), Allison et al.
patent: 2002/0177628 (2002-11-01), Gaffney et al.
patent: 0 333 037 (1989-03-01), None
patent: 9-141098 (1997-06-01), None

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