Method for preparing a zirconium-cerium composite oxide
US6171572A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jun 22, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A zirconium--cerium composite oxide having excellent heat resistance and being capable of maintaining its large specific surface area even when used under high-temperature conditions, which composite oxide contains zirconium and cerium at a weight ratio of 51 to 95:49 to 5 in terms of zircomium oxide and ceric oxide, the composite oxide having a specific surface area of not smaller than 50 m.sup.2 /g, wherein said composite oxide is capable of maintaining a specific surface area of not smaller than 20 m.sup.2 /g even after heating at 1100.degree. C. for 6 hours, a method for preparing the same, and a co-catalyst for purifying exhaust gas prepared with the composite oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.