Exhaust gas purifying catalyst suppressing the generation of hydrogen sulfide and method of making the catalyst
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United States of America Patent
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Feb 15, 1994
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app pub date -
Dec 20, 1991
filing date -
Dec 9, 1988
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Abstract
An exhaust gas purifying catalyst suppressing the generation of hydrogen sulfide obtained by coating and supporting on a honeycomb carrier of a monolithic structure a catalyst composition containing (a) activated alumina supporting platinum and/or palladium in the range of 5 to 30 weight % and rhodium in the range of 1 to 20 weight %, (b) a cerium oxide and (c) activated alumina, and optionally (d) an alkali metal and/or (e) a nickel oxide.
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