Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1994-07-08
1999-02-16
Fortuna, Ana
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210651, 210490, 21050025, 210506, 427247, 96 11, 95 50, 95 55, 585818, B01D 6100
Patent
active
058716505
ABSTRACT:
The present invention is directed toward a new zeolite membrane which exhibits a columnar cross-sectional morphology and preferred crystallographic orientation comprising a porous substrate having coated thereon a mesoporous growth enhancing layer and a layer of columnar zeolite crystals on said mesoporous growth enhancing layer, and wherein said mesoporous growth enhancing layer comprises nanocrystalline or colloidal sized zeolites, nanocrystalline or colloidal zeolite and metal oxide, or nanocrystalline or colloidal zeolite and colloidal metal, or nanocrystalline or colloidal zeolite, colloidal metal and metal oxide, and wherein said mesoporous growth enhancing layer has interstices of about 20 to about 2000 .ANG., and wherein said columnar zeolite layer is a polycrystalline layer wherein 99.9% of said columnar zeolite crystals have at least one point between adjacent crystals that is .ltoreq.20 .ANG.. The invention is further directed to a process of producing a zeolite membrane exhibiting a columnar crystallographic orientation.
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Deckman Harry William
Lai Wenyih Frank
McHenry James Alexander
Verduijn Johannes Petrus
Bakun Estelle C.
Exxon Research and Engineering Company
Fortuna Ana
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