Process for recovering and purifying a high molecular weight sul

Details Process for recovering and purifying a high molecular weight sul Process for recovering and purifying a high molecular weight sul

1989-11-01

1991-02-26

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

528493, 528494, 528496, B01D 1104

Patent

active

049959824

ABSTRACT:
A process for separating a relatively high molecular polymeric sulfonate, such as a polyvinyl sulfonate, from undesirable by-products of solfonation. An aqueous solution having a polymeric sulfonate dissolved therein is contacted with from about 7.5 to about 40 volume percent of a solvent selected from methanol, ethanol, acetone, or dipropylene glycol monomethyl ether to remove undesirable by-products of sulfonation therefrom and to enhance the molecular weight of the polymeric sulfonate.

REFERENCES:
patent: 4065414 (1977-12-01), Selta et al.
patent: 4359555 (1982-11-01), d'Hondt et al.
patent: 4361658 (1982-11-01), Lundberg et al.
patent: 4412028 (1983-10-01), Lundberg et al.
Encyclopedia of Polymer Science and Technology, vol. 6, 1967, pp. 458, 459 and 461.

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