COLLOIDAL DISPERSION OF METALLIC CATIONS

摘要

1. Process for the preparation of a colloidal dispersion of a compound of a metal cation of an acidic nature in an organic medium, characterized in that it consists : - in bringing into contact : (a) an aqueous phase consisting of at least one colloidal dispersion of at least one compound of a metal cation of an acidic nature M**n+ in an aqueous medium supersaturated with OH**- ions, obtained by reaction of an aqueous solution of a salt of the cation M**n+ and of a base introduced in such quantity that it represents up to 95 mol-% of the theoretical quantity of base required to obtain M(OH)n , (b) an organic phase comprising an organic acid and an organic liquid medium or solvent, - and in then separating the aqueous phase from the organic phase.