Patent ID: 6218329
Filing Date: 2001-04-17
Classification: C01B

Abstract:
A process for the preparation of an amorphous alumino-silicate derivative, said amorphous alumino-silicate derivative having the general formulaM.sub.p Al.sub.q Si.sub.2 O.sub.r (OH).sub.s.uH.sub.2 Owherein 0.2.ltoreq.p.ltoreq.2.0, 0.5.ltoreq.q.ltoreq.2.5, 4.0.ltoreq.r.ltoreq.12, 0.5.ltoreq.s.ltoreq.4.0, and0.0.ltoreq.u.ltoreq.6.0, and wherein M is an ammoniumium or an alkali metal cation; said process comprising mixing a solid alumino-silicate starting material with a solid alkali metal hydroxide or ammonium hydroxide to form a solution having a molar excess of alkali metal hydroxide or ammonium hydroxide, and heating to form the amorphous alumino-silicate derivative.