Intermetallic catalyst
US4197217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1978 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Aug 1, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 oxidizing 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 A.sub.x B.sub.y 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.