Auto exhaust catalysts prepared from sulfite treated platinum and palladium salt solutions
US3932309A · kind A · utility
14Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jun 5, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing a catalyst that has improved activity and efficiency for conversion of hydrocarbons is disclosed. The catalyst is prepared by applying sulfito complexes have the emperical formula M.sub.6 (x) (SO.sub.3).sub.4 where M is H+ NA+, K+ or NH.sub.4 + and x is platinum, palladium or mixtures thereof. In addition, the compounds M.sub.2 (x) (SO.sub.3).sub.2 and M.sub.2 (x) (SO.sub.3).sub.2 also have utility in our process. The complex salt is impregnated onto a support and activated by calcination in air or heating in a reducing atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.