Recovery of cerium from polymer dispersions

Details Recovery of cerium from polymer dispersions Recovery of cerium from polymer dispersions

1980-05-08

1981-07-21

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210681, 423 6, 423 215, 423182, 423DIG14, 521 26, 521 28, 521 30, 521 33, 528482, C08L 302

Patent

active

042797918

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).

REFERENCES:
patent: 2694681 (1954-11-01), Bray et al.
patent: 2897050 (1959-07-01), Jaffe
patent: 2922768 (1960-01-01), Mino et al.
patent: 3509084 (1970-04-01), Aspon et al.

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