Method of preparing ZSM-5 zeolite using nanocrystalline ZSM-5 seeds
US8840864B2 · kind B2 · utility
1Cited by
6References
5Claims
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Key dates
| Filing date | Oct 18, 2010 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Apr 10, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of preparing ZSM-5, including: providing a nanocrystalline ZSM-5 seed having a size of 70-150 nm; adding the nanocrystalline ZSM-5 seed to a stock solution including water glass as a silica source, an alumina source, a neutralizer and water to form a reaction mixture; and maintaining the reaction mixture at 150-200° C. to crystallize the reaction mixture. The method is advantageous in that ZSM-5 having small and uniform crystal sizes and including no impurities can be synthesized in a short period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.