Synthesis of hierarchical nanocrystalline zeolites with controlled particle size and mesoporosity
US8951498B2 · kind B2 · utility
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26Claims
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Key dates
| Filing date | Jul 28, 2011 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Jul 5, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A one step synthesis of nanocrystalline zeolites ZSM-5 and Naβ from a single template system in high yield has been discovered. The size of individual nanocrystals, as well as mesopore surface area and pore volume can be controlled by adjusting the pH of the reaction mixture, as well as the hydrothermal treatment temperature and duration. The mesopore volume and size distribution show a dependence on particle size such that smaller particles lead to higher mesopore volumes and narrower pore size distributions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.