초록 ▼

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 a

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.

대표청구항 ▼

[ What is claimed is:] [39.] A method for separating the molecular components of a gaseous stream comprising a mixture of small molecules, said method comprising:sequentially contacting said gaseous stream with a plurality of supported inorganic membranes capable of molecular sieving, wherein the te

[ What is claimed is:] [39.] A method for separating the molecular components of a gaseous stream comprising a mixture of small molecules, said method comprising:sequentially contacting said gaseous stream with a plurality of supported inorganic membranes capable of molecular sieving, wherein the temperature of each membrane is greater than the temperature of the previously contacted membrane,whereby the molecular components of said gaseous stream are separated.