Patent ID: 7507392
Filing Date: 2009-03-24
Classification: C01B

Abstract:
1. A method for preparing a hybrid aluminosilicate polymer, comprising the following steps: a) treating a mixed aluminum and silicon alkoxide of which the silicon has hydrolyzable substituents and one non-hydrolyzable substituent, or a mixed aluminum and silicon precursor resulting from the hydrolysis of a mixture of aluminum compounds and silicon compounds only having hydrolyzable substituents and silicon compounds having one non-hydrolyzable substituent, with an aqueous alkali, in the presence of silanol groups, the aluminum concentration being maintained at less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3 b) stirring the mixture resulting from step a) at ambient temperature of between 15° C. and 35° C. in the presence of silanol groups long enough to form the hybrid aluminosilicate polymer; and then directly c) eliminating the byproducts formed during steps a) and b) from the reaction medium.