Dealumination and selective removal of organic material from zeolites
US5425934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/21
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a method for treating synthetic zeolite to remove organic template material therefrom and concurrently therewith effect dealumination of the zeolite. The method comprises the steps of providing a body of synthetic zeolite containing organic template material, the zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1. The body is treated with a solution comprised of an alcohol selected from methanol, ethanol and propanol and an acid selected from hydrochloric, nitric and sulfuric acid at a temperature and time to remove the organic template material therefrom and to effect dealumination thereof to provide a treated zeolite product. The treated product is washed to remove residual solution and then dried to provide a synthetic zeolite product containing a reduced amount of organic template material and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.