Process for the dealumination and ion exchange of zeolites
US5057472A · kind A · utility
7Cited by
7References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Nov 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The instant invention comprises a process for concurrently dealuminating and ion exchanging an acid stable sodium ion-containing zeolite by contacting the zeolite with an about 0.5M to about 3M nitric acid solution containing ammonium nitrate in an amount sufficient to fully exchange the sodium ions for ammonium and hydrogen ions at a temperature of at least about -10.degree. C. The instant invention also relates to the zeolites thus prepared by the instant process and catalysts prepared utilizing these zeolites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.