Process for making supported thin zeolite membrane
US7476635B2 · kind B2 · utility
7Cited by
12References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 23, 2003 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Apr 25, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Described is a process for the preparation of a supported zeolite membrane that consists of a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, comprising: The molar ratio of the water to the silica in the gel or the solution in stage a) is between 27:1 and 35:1. The crystallization time of stage c) is at least 25 hours.Said process is particularly suited for the preparation of zeolite membranes whose zeolite phase is of the MFI-structural type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.