Patent ID: 6174926
Filing Date: 2001-01-16
Classification: B01J,C01B,C01P,C09C,Y10T

Abstract:
A method of preparing an organically modified silica gel comprising:(a) providing a mixture consisting essentially of:(i) at least one organically modified silica precursor selected from the group consisting of trifunctional silanes of the general formula RSiX.sub.3, wherein R is independently selected from the group consisting of aliphatic hydrocarbon and fluorocarbon radicals of 6 carbon atoms or less and phenyl radicals, and each X is independently selected from the group consisting of halogen radicals and hydroxyl radicals and salts thereof,(ii) water, and(iii) at least one tetrafunctional silane selected from the group consisting of silica, sodium silicate, and silanes of the formula SiX.sub.4, wherein each X is independently selected from the group consisting of halogen radicals,(b) allowing an organically modified silica gel to form in said mixture, and(c) recovering said organically modified silica gel from said mixture.