Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Patent
1997-07-18
1998-06-30
Walker, W. L.
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
96 4, 96 10, 210490, 210496, 21050025, 21050026, 210506, 2105101, 265 42, 265 43, 265621, 501 12, 501 80, 501 85, B01D 5322
Patent
active
057727350
ABSTRACT:
Supported inorganic membranes capable of molecular sieving, and methods for their production, are provided. The subject membranes exhibit high flux and high selectivity. The subject membranes are substantially defect free and less than about 100 nm thick. The pores of the subject membranes have an average critical pore radius of less than about 5 .ANG., and have a narrow pore size distribution. The subject membranes are prepared by coating a porous substrate with a polymeric sol, preferably under conditions of low relative pressure of the liquid constituents of the sol. The coated substrate is dried and calcined to produce the subject supported membrane. Also provided are methods of derivatizing the surface of supported inorganic membranes with metal alkoxides. The subject membranes find use in a variety of applications, such as the separation of constituents of gaseous streams, as catalysts and catalyst supports, and the like.
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Brinker Charles Jeffrey
Sehgal Rakesh
Galliani William S.
Sandia Natl Laboratories
University of New Mexico
Walker W. L.
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