Patent ID: 6245310
Filing Date: 2001-06-12
Classification: B01J,C01B

Abstract:
A process for manufacturing alumino-silicates that are dispersible in aqueous and/or aqueous-acidic media characterized in that:(a) at least one hydrolyzable aluminium compound is hydrolyzed;(b) prior to, during, or after hydrolysis, said aluminium compound is contacted with at least one silicic acid compound;(c) prior to, during, or after the hydrolysis, a monovalent C.sub.1 to C.sub.6 acid or a monovalent inorganic acid is added to produce an acidified mixture containing said monovalent acid, said at least one silicic acid compound, and said at least one aluminium compound; and(d) the acidified mixture is hydrothermally aged in an aqueous medium in the presence of said monovalent acid at a temperature of 40 to 220.degree. C. for a period of more than 0.5 hours to form a reaction product, using an aluminium compound-silicon compound ratio ranging from 99.5 wt. %:0.5wt. % to 70 wt. %:30 wt. % based on the ratio of Al.sub.2 O.sub.3 : SiO.sub.2.