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US 5,183,575 AGranted
Methods for the flocculation of coal fines and insoluble metals in coal mine waters
AssigneeBetz Laboratories, Inc.
InventorsStephen R. Vasconcellos, P. Douglas Boyce, Larry P. Smith
Life of this patent
Estimating the term…
Abstract
Coal fines and suspended insoluble metals are flocculated from coal mine drainage waters by adding a polymeric tannin-amine compound.
Claims10
A method for flocculating coal fines and suspended insoluble metals in coal mine drainage waters having a pH of about 6 to 9 comprising adding to said coal mine drainage waters 1 part to 100 parts per million parts coal mine drainage waters a polymeric tannin-amine compound having a molecular weight of about 5 to about 10,000 daltons.
Dependencies are inferred from the claim text.