Three-way catalysts from organo noble metal precursors
AssigneeFord Motor Company
InventorsSomasundaram Subramanian, Mohinder S. Chattha
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Abstract
The invention is directed to a method for enhancing the catalytic effectiveness of noble metal catalysts to reduce NO.sub.x and to oxidize hydrocarbons, which comprises: providing a solution of an organo noble metal compound dissolved in an organic solvent; impregnating a support material, preferably comprising at least 50% by weight .gamma.-alumina, with the solution; and heating the impregnated support material to evaporate the solvent and eliminate the organo group leaving the coated support material with the noble metal.
Claims11
A process for reducing the emission of exhaust gases produced by an internal combustion engine, which process comprises:
- passing said exhaust gases over a catalyst made by a method which consists essentially of:
- providing a solution of an organo noble metal compound dissolved in an organic solvent;
- impregnating a support material, comprising at least 50% by weight .gamma.-alumina, with said solution;
- and
- heating said impregnated support material to evaporate said solvent and eliminate the organo group leaving said support material with a surface coating of said noble metal.
Dependencies are inferred from the claim text.