Patent ID: 8277661
Filing Date: 2012-10-02
Classification: B01D,C08G,Y02E,Y10T

Abstract:
1. A microporous organic-inorganic hybrid membrane based on silica, supported by a mesoporous layer, the microporous membrane having an average pore size of less than 1.5 nm, and in which between a portion of the Si—O—Si bonds have been replaced by moieties having the following formula: in a molar ratio represented by the following formulae: or in which: A A n=2m, 2m−2, 2m−4, 2m−6, or 2m−8, provided that n≧2, s=2r, 2r−2, 2r−4 or 2r−6, provided that s≧2, M is a metal selected from yttrium, lanthanum, titanium, zirconium, hafnium, aluminum, gallium, germanium and tin.