Catalyst – solid sorbent – or support therefor: product or process – In form of a membrane
Patent
1995-07-07
1998-06-09
Bos, Steven
Catalyst, solid sorbent, or support therefor: product or process
In form of a membrane
502 64, 502 66, 502 71, 502 77, B01J 2028
Patent
active
057633479
ABSTRACT:
Applicant has discovered a new zeolite containing composition and a process for preparing the same. The composition is unique in that the zeolite crystals making up one layer of the composition pack in a manner such that the composition is essentially continuous with no large scale voids even when the zeolite layer is <10 .mu.m thick. Thus, the present invention is directed toward a composition comprised of a porous substrate and a layer of zeolite crystals wherein said layer of zeolite crystals is a polycrystalline layer with at least 99% of said zeolite crystals having at least one point between adjacent crystals that is .ltoreq.20 .ANG. and wherein at least 90% of said crystals have widths of from about 0.2 to about 100 microns (preferably about 2 to about 50 microns) and wherein at least 75% of said crystals have a thickness of within 20% of the average crystal thickness. Preferably the composition has at most 1 Volume % voids in the zeolite layer. Use of the composition is also described.
REFERENCES:
patent: 5100596 (1992-03-01), Haag et al.
Bakun Estelle C.
Bos Steven
Dunn Jr. Thomas G.
Exxon Research and Engineering Company
Simon Jay
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