Isomorphously substituted molecular sieve membranes

Details Isomorphously substituted molecular sieve membranes Isomorphously substituted molecular sieve membranes

2006-07-11

2006-07-11

Johnson, Christina (Department: 1725)

Catalyst, solid sorbent, or support therefor: product or process

In form of a membrane

C502S060000, C502S064000, C502S066000, C502S074000

Reexamination Certificate

active

07074734

ABSTRACT:
Zeolite membranes that can be used to continuously separate components of mixtures are disclosed. The zeolite membranes are prepared by isomorphous substitution, which allows systematic modification of the zeolite surface and pore structure. Through proper selection of the basic zeolite framework structure and compensating cations, isomorphous substitution permits high separation selectivity without many of the problems associated with zeolite post-synthesis treatments. The inventive method for preparing zeolite membranes is alkali-free and is much simpler than prior methods for making acid hydrogen zeolite membranes, which can be used as catalysts in membrane reactors.

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