Recovery of cerium from polymer dispersions
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United States of America Patent
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Jul 21, 1981
Grant Date -
N/A
app pub date -
May 8, 1980
filing date -
May 8, 1980
priority date (Note) -
Expired
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Abstract
This invention relates to removal of cerium, used as a free-radical initiator, from aqueous polymeric dispersions, particularly starch graft copolymer dispersions, by adsorbing cerium (III) onto a strong cation exchange resin, to separation of the adsorbed cerium (III) from the resin using a solution such as sodium sulfate or sodium oxalate to form a cerium (III) precipitate, and to oxidation of the separated cerium (III) to cerium (IV).
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