Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1994-06-01
1996-02-20
McGinty, Douglas J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502328, 4232135, B01J 3714, B01J 3708, B01J 2358, B01J 2104
Patent
active
054928800
ABSTRACT:
A process for chemically converting surface hydroxyl groups present on an uminum oxide supported rhodium catalyst that is suitable for use as an automotive catalyst in controlling automotive exhaust emissions is disclosed. The process includes converting the hydroxyl groups on the aluminum oxide supported catalyst by reacting the aluminum oxide support with an alumina modifier which comprises an inorganic compound containing the cation Y, wherein Y is either an alkali metal or an alkaline earth metal. This process involves replacing the hydroxyl groups on the aluminum oxide support with OY groups to resist the oxidative conversion of supported metallic rhodium Rh.sub.x .sup.(O) to Rh.sup.(I). An associated catalyst suitable for use in automotive catalytic converter technology for environmental protection is provided.
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Ballinger Todd H.
Yates, Jr. John T.
Zaki Mohamed I.
Appleman Jolene W.
McGinty Douglas J.
Silverman Arnold B.
University of Pittsburgh of the Commonwealth System of Higher Ed
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