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US 4,784,776 AGranted
Process for treating aqueous suspension
AssigneePony Industries, Inc.
InventorFrancis J. Mangravite, Jr.
Life of this patent
Estimating the term…
Abstract
Blends of formaldehyde-based aminoplast resins and water-soluble amines are employed in the purifications of aqueous liquids which contain suspended matter.
Claims3
An improved process for removing suspended matter from coal pile run-off water comprising contacting said coal pile run-off water with a flocculating agent comprising a mixture of a water dispersible melamine-formaldehyde resin and a diallyldialkylammonium halide polymer, the weight ratio of said water dispersible resin to said polymer being about 90:10.
Dependencies are inferred from the claim text.