Patent ID: 6565643
Filing Date: 2003-05-20
Classification: B01J,C01B

Abstract:
A process for preparing a synthetic clay mineral which comprises silicon, aluminium, and at least one octahedron ion, which clay mineral has a total content of sodium and potassium of less than 0.5 wt. %, comprising the steps ofa) providing a silica-alumina with a total content of sodium and potassium of less than 2.0 wt. %; b) combining the silica-alumina with an octahedron ion source in such a manner that less than 0.1 mole of the total of sodium and potassium is added per mole of octahedron ion; c) obtaining a precipitate of octahedron ion with said silica-alumina, the pH being maintained at a value of at least 7, in such a manner that less than 0.1 mole of the total of sodium and potassium is added per mole of octahedron ion; and d) ageing the precipitate formed in c) at a temperature of 0-350Â° C. in an aqueous environment.