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US 4,061,565 AGranted
Sorption of weak organic acids from water by polyurethane
AssigneeUniroyal, Inc.
InventorsOwen Victor Washburn, Georgeos Konstandenos Kouvarellis, William Alexander Ferguson
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Abstract
The separation and recovery of weakly acidic organic substances from aqueous solution by means of granules of unblown polyurethane.
Claims27
The method of extracting a weakly acidic, monomeric organic substance from an aqueous solution thereof which comprises contacting said solution, having a pH value less than the pK.sub.a value of said acidic substance, with granules of unblown polyurethane resin for a sufficient time to permit absorption of a substantial amount of said acidic substance from said solution by said resin granules.
Dependencies are inferred from the claim text.