Catalyst composition for ultra high temperature operation
US4585752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Aug 15, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A high temperature stable catalyst is made with fine particles of a base metal such as chromium, hafnium and niobium or their oxides dispersed throughout a matrix made of composite particles having at least one platinum group metal on a ceria promoted, high temperature chemically stabilized refractory oxide powder. The refractory oxide powder can be either alumina, alumina powder which has been calcined at a temperature near incipient alpha alumina formation, silica-alumina or zirconia. The base metal or base metal oxide comprises about 15% to 90% by weight of the total weight and the platinum group metal comprises 0.05% to 10% by weight of the total weight. The catalyst composition can be applied as a washcoat to conventional substrates or it can be formed into shaped catalysts. The washcoat is made by mixing together one slip containing the composite particles with a second slip containing the base metal or base metal oxide particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.