Kolloidal dispersjon av en ceriumforbindelse og inneholdende cerium III, fremstillingsmetode og anvendelse

摘要

The invention relates to a colloidal dispersion of a cerium compound containing the cerium (iii). This dispersion is characterized in that it has a concentration of cerium oxide of at least 50g / l, a proportion of cerium (iii) with respect to cerium total of at least 0, 5% and a conductivity of at most 5ms / cm. It is obtained by a process in which is reacted at least one salt of cerium (iii) with a base and in the presence of an acid in an amount such that the ratio h.sup. + / this is greater than 1, and then redisperses in water, the precipitate from the reaction précédente.les dispersions of this type may be used in catalysis, lubrication, in the ceramics, in the manufacture of a luminophore compounds or films of polymers, in the cosmetics and as an anticorrosion agents.