Process for obtaining colloidal dispersion of rare earth...

B - Operations – Transporting – 01 – J

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B01J 13/00 (2006.01) C01F 17/00 (2006.01) C07F 5/00 (2006.01)

Patent

CA 1303940

PRECIS DE LA DIVULGATION: L'invention vise un procédé d'obtention d'une dispersion colloïdale d'un composé de terre rare, de préfé- rence yttrique, en milieu aqueux. Ce procédé consiste à faire réagir un oxyde de terre rare avec une quantité con- trôlée d'un acide monovalent, soluble dans l'eau et pré- sentant un pka compris entre 2,5 et 5,0, puis à chauffer le milieu réactionnel obtenu. L'invention vise également la dispersion colloïdale obtenue, laquelle peut notamment être utilisée comme produit de départ pour la préparation de poudres semiconductrices.

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