Catalyst for purification and/or control of exhaust gases

Details Catalyst for purification and/or control of exhaust gases Catalyst for purification and/or control of exhaust gases

B - Operations, Transporting

01

J

23/342, 252/45

B01J 21/04 (2006.01) B01D 53/94 (2006.01) B01J 23/40 (2006.01) B01J 23/42 (2006.01) B01J 23/74 (2006.01) B01J 23/89 (2006.01) B01J 37/02 (2006.01) F01N 3/035 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1123818

ABSTRACT OF THE DISCLOSURE This invention relates to catalysts suitable for the catalytic oxidation of hydrocarbons and carbon monoxide and for the catalytic reduction of oxides of nitrogen in the presence, respectively, of suitable oxidising and reducing means. The invention is especially concerned with catalysts which are suitable for the catalytic purification or control of the exhaust gases of petrol driven internal combustion engines and of diesel engines. Such catalysts have been variously described as "three-way", "polyfunctional" and "multi-functional" catalysts. In more detail a three way catalyst of the invention comprises a substrate having supported thereon at least one intermetallic compound of the general formula AxBy where A represents one or more Groups VIII metals having an atomic number not larger than 78; B represents one or more metals of the group consisting of Al, Sc, Y, the lanthanides, Ti, Zr, Hf, V, Nb and Ta and x and y are integers.

308332

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