Appeal No. 1997-0359
Application No. 08/173,485
organic
salts of ceric dioxide have used, as their starting materials,
hydrated ceric dioxide. This material, however, was
frequently produced by the oxidation and precipitation with a
base of cerium (III) salt, followed by the separation of the
resulting precipitant. The invention provides a novel
storage-stable organic sol which is produced by directly
preparing a colloidal dispersion of cerium (IV) salt, while
avoiding the necessity for stages of precipitation and
separation of hydrated cerium dioxide. In particular, the
present invention provides a storage-stable organic sol which
comprises a colloidal dispersion of at least one compound of
an acidic metal cation, M [seen+
page 2 of brief] and an organic phase, wherein the organic
phase comprises an organic liquid medium and an organic acid.
The invention is further illustrated below by claim 23.
23. A process for the preparation of a storage-stable
organic sol comprising:
(i) reacting (a) a base reactant with (b) at
least one aqueous solution of a salt of an acidic
2
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