Process for making a germanium-zeolite
US7449168B2 · kind B2 · utility
4Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2004 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Dec 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to a process for making a germanium-zeolite without using fluoride compounds. The zeolite is preferably a MFI-type structure, most preferably a ZSM-5 MFI zeolite. The germanium-zeolite is synthesized essentially in the absence of fluoride compounds from an aqueous gel containing a silica source, a germanium source, an aluminum source and a structure directing agent in the presence of an acid which does not contain fluorine, such as sulfuric acid, acetic acid, nitric acid, phosphoric acid hydrochloric acid or formic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.