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US 9,517,941 B2Granted
Introduction of mesoporosity in low Si/Al zeolites
AssigneeRive Technology, Inc.
InventorsJavier Garcia-Martinez, Marvin M. Johnson, Ioulia Valla
Life of this patent
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Abstract
Compositions and methods for preparing mesoporous materials from low Si/Al ratio zeolites. Such compositions can be prepared by acid wash and/or isomorphic substitution pretreatment of low Si/Al ratio zeolites prior to introduction of mesoporosity.
Claims20
A method of forming a material comprising at least one mesoporous zeolite, said method comprising the steps of:
- (a) acid washing a non-mesoporous initial zeolite with an acidic medium thereby forming an acid-washed zeolite, wherein said initial zeolite has a total silicon-to-aluminum (Si/Al) ratio of less than 30, wherein said acid washing of step (a) removes aluminum atoms from said initial zeolite such that said acid-washed zeolite has a higher Si/Al ratio than said initial zeolite;
- (b) recovering said acid-washed zeolite from said acidic medium thereby forming a recovered zeolite;
- and
- (c) contacting said recovered zeolite with a mesopore-forming medium thereby forming at least one mesopore within said recovered zeolite and providing said mesoporous zeolite.
1 more element
Dependencies are inferred from the claim text.