Catalyst support having zeolite with high sodium back ion-exchange capacity and catalysts made therefrom
US6235255A · kind A · utility
7Cited by
11References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | May 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to catalyst support comprising an inorganic oxide, preferably alumina, and zeolite in the proton form and having a high Si/Al ratio, wherein the zeolite is selected from those protonated zeolites that would exhibit a high Na/Al mole ratio if treated with a solution of sodium nitrate until all sites that will accept a sodium ion have done so. This invention also relates to catalyst that is made from such support, to a method of treating exhaust gas from "lean-burn" engines using catalyst of this invention, and to a method for determining if a zeolite is a suitable support component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.