Patent ID: 6136048
Filing Date: 2000-10-24
Classification: B01J,B82Y,C01F,C01G,C01P,C10L

Abstract:
Process for preparing a colloidal dispersion comprising at least one oxygenated rare-earth compound, comprising the following steps:(a) preparing an aqueous phase comprising at least one oxygenated metal compound in dispersion;(b) bringing into contact the dispersion of step (a) with an organic phase including at least one amphilic agent to form a reaction mixture; and(c) recovering the organic phase; and wherein said oxygenated metal compound is obtained by a process comprising the steps below:.alpha.) preparing a solution comprising at least one soluble rare-earth salt;.beta.) bringing the solution into contact with a basic medium and maintaining the reaction mixture thus formed at a basic pH; and.gamma.) recovering the precipitate formed by atomization or freeze-drying.