Patent ID: 7560092

Claim:
A method for preparing an aluminosilicate polymer, comprising the following steps: a) treating a mixed aluminum and silicon alkoxide only comprising hydrolyzable functions, or a mixed aluminum and silicon precursor resulting from the hydrolysis of a mixture of aluminum compounds and silicon compounds only comprising hydrolyzable functions, with an aqueous alkali, in the presence of silanol groups, the aluminum concentration being maintained at between 1.5×10 −2 and 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 aluminosilicate polymer; and directly after step (b) (c) eliminating the byproducts formed during steps a) and b) from the reaction medium.