Isomorphous substitution of metals during the synthesis of a zeolite framework
US11655158B2 · kind B2 · utility
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Key dates
| Filing date | Oct 13, 2020 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Oct 13, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure relates to a novel staged-synthesis method for introduction of various metals in the structure of zeolite frameworks by isomorphous substitution. This new method is based on a hydrothermal synthesis in which the metal addition to the precursor suspensions (gel) is delayed. This so-called “staged-synthesis method” allows to obtain nanosized silanol highly homo-geneous crystalline zeolite structures with a control of the metal location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.