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US 5,393,435 AGranted
Removal of organic contaminants from aqueous media
AssigneeVanson L.P.
InventorsJohn R. Deans, George E. Heinsohn, Bernard A. Link
Life of this patent
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Abstract
Process and composition for treating aqueous media to remove impurities using chitosan, polysilicic acid and/or poly aluminosilicate, ferric compound and clay.
Claims6
A process for removing organic contaminants and turbidity from aqueous media, the process comprising
- (1) adding to an aqueous medium comprising an organic contaminant and turbidity a flocculating composition comprising, on a dry weight basis, at least about 1 ppm chitosan, at least about 20 ppm soluble ferric compound, and least about 5 ppm of polysilicic acid and/or clay poly aluminosilicate;
- the additives being added in an amount sufficient to flocculate the organic contaminant and turbidity and form a flocculate comprising the organic contaminant and turbidity;
- and
- (2) separating the flocculate from the aqueous medium.
1 more element
Dependencies are inferred from the claim text.