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US 4,051,079 AGranted
Regeneration of acidic cation exchange resin using acidified phenol-water mixture
AssigneeUnion Carbide Corporation
InventorEarl George Melby
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Abstract
Acidic cation exchange resin whose activity has been reduced by fouling from phenolic tars and/or by contamination by metal ions, is regenerated by treating such resin with an acidified phenol/water wash.
Claims8
Process for regenerating sulfonated acidic cation exchange resin that has been deactivated with phenol-derived organic tars or by contamination with metallic ions, or both, which process comprises passing a phenol-water mixture containing an acid having a pKa of less than about 3 through said resin, wherein the major component of said mixture is phenol.
Dependencies are inferred from the claim text.