COLLOIDAL DISPERSION OF A COMPOUND OF A RARE EARTH THAT IT INCLUDES AN AGENT ANTIOXIDANT AND ITS USE

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The invention relates to a dispersion of the type comprising particles of a rare earth compound, particularly a compound of cerium, an acid and an organic phase, characterized in further comprising an anti-oxidant agent which can particularly be selected from substituted derivatives of phenol, aromatic amines or tocopherols. Said dispersion may be used as additive for diesel fuel for internal combustion engines, in particular as additive for diesel for diesel engines.