Catalyst composition for the purification of the exhaust of diesel vehicles, catalyst using the same and preparing methods thereof
US5763352A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J38/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The composition based on a discharge from an oil refining plant after a desulfurization of heavy oils in the oil refining plant using a catalyst, comprising: 80% or less of vanadium; 80% or less of molybdenum; 20% or less of nickel; 30% or less of cobalt; 99% or less of alumina; and a trace of the impurities, which is catalytically active to purify the exhaust of diesel vehicles. A filter or a washcoat made of the discharged catalyst composition alone or in combination with ordinary filtering materials or ordinary washcoat materials can be very useful for purification of smoke. In addition, a catalyst in which at least one metal of the platinum group is uniformly impregnated on the filter is quite superior to conventional ones employing alumina or titania as a washcoat in stability to both high temperature and sulfur trioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.