Back to results
US 5,093,091 AGranted
Method of removing iron from concentrated alum solutions
AssigneeAmerican Cyanamid Company
InventorsDavid L. Dauplaise, Wei S. Yen
Life of this patent
Estimating the term…
Abstract
Iron is removed from concentrated alum solutions by contacting said solutions with a polymer containing hydroxamic acid or salt groups.
Claims11
A process for the removal of iron from concentrated aluminum sulfate solutions which comprises oxidizing the iron contained in said aluminum sulfate solution and adding to the resultant oxidized iron containing solution a water-soluble polymer containing pendant hydroxamic acid or salt groups said polymer having a molecular weight of at least about 100,000 in an amount effective to settle said oxidized iron therein.
Dependencies are inferred from the claim text.