| 摘要 |
Weakly acidic colloidal dispersions of cerium (IV) compounds in aqueous media, the colloidal solids of which having the general formula Ce(A)x(NO3)y(OH)4-x-y, in which A is the anion of a water-soluble monovalent carboxylic acid having a pKa of from 2.5 to 5.0, are produced by (a) reacting and destabilizing an aqueous colloidal dispersion of a cerium (IV) compound with a water-soluble salt of such monovalent acid, (b) separating the precipitate which results, and (c) dispersing the precipitate thus separated in an aqueous medium, e.g., distilled water.
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