Process for making a lead-tolerant catalyst system for purifying exhaust
US4539311A · kind A · utility
16Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1984 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Jun 20, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for improving the lead tolerance of a motor vehicle exhaust purification catalyst system of the type comprising a platinum group metal catalyst carried on alumina. The improvement derives from impregnating the alumina with barium moiety and firing at at least 400.degree. C. before subsequent impregnation with the metal catalyst moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.