Method for recovering vinyl sulfonate monomers

Details Method for recovering vinyl sulfonate monomers Method for recovering vinyl sulfonate monomers

1974-12-18

1976-07-20

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210 40, 260 296AN, 260 296SQ, 260 795R, 260708, 526 68, 526342, B01D 1500, B01D 5314, C08F 2802, C08L 3320

Patent

active

039706052

ABSTRACT:
Vinyl sulfonate monomers are recovered from an aqueous stream by bringing the stream into contact with activated carbon to allow the carbon to adsorb the monomers from the stream. The sulfonate monomers are subsequently removed from the carbon by bringing an aqueous solution of acrylonitrile into contact with the carbon. The acrylonitrile replaces the sulfonate monomers on the carbon to thereby desorb the sulfonate monomers into the solution in a concentration such that the solution is useful as a feed stream directly to a polymerization reactor. The sulfonate monomers have the formula ##SPC1##
Where R.sub.1 is --H or --CH.sub.3, R.sub.2 is --CH.sub.2 O--, --O--, or --CH.sub.2 , n is 0 or 1 and X is Na, K or H.

REFERENCES:
patent: 2696304 (1954-12-01), Gilmore
patent: 2696510 (1954-12-01), Weedman
patent: 3005826 (1961-10-01), Fleck et al.
patent: 3295689 (1967-01-01), Avanitakis
patent: 3370002 (1968-02-01), Cottle
patent: 3547899 (1970-12-01), Arlt et al.
Chemical Abstracts, vol. 67, No. 20, 11/13/1967, p. 94, 304 K.
Chemical Abstracts, vol. 72, No. 18, May 4, 1970, p. 93, 624F.
Chemical Abstracts, vol. 73, No. 4, July 27, 1970, p. 16, 616Y.
Chemical Abstracts, vol. 74, No. 14, Apr. 5, 1971, p. 68, 116A.
Chemical Abstracts, 8th Collective Index, 1972, p. 6, 423S

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