Hydrophobic polyelectrolyte coagulants for concentrating coal ta

Details Hydrophobic polyelectrolyte coagulants for concentrating coal ta Hydrophobic polyelectrolyte coagulants for concentrating coal ta

1992-08-18

1994-07-19

Medley, Margaret

Fuel and related compositions

Coal treating process or product thereof

44626, 210734, C10L 910, C02F 156

Patent

active

053305469

ABSTRACT:
A method for concentrating coal tailings which comprises steps of: feeding the coal tailings to a thickener; treating the coal tailings with a hydrophobic polyelectrolyte copolymer coagulant which comprises diallyldimethylammonium chloride and a more hydrophobic monomer, the coagulant is added to the coal tailings in an amount between about 0.05 to about 0.25 lb/ton; treating the coal tailings with a flocculant in an amount between about 0.05 to about 0.25 lb/ton; discharging substantially concentrated tailing; and withdrawing substantially clarified liquid from the thickener.

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patent: 4906386 (1990-03-01), Vasconcellos et al.

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