Process for recovering and purifying a high molecular weight sulfonate
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United States of America Patent
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Feb 26, 1991
Grant Date -
N/A
app pub date -
Nov 1, 1989
filing date -
Nov 1, 1989
priority date (Note) -
Expired
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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.
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