Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1997-05-14
1998-09-01
Woo, Jay H.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210728, 210781, 210783, 162 5, C02F 154
Patent
active
058007199
ABSTRACT:
A method for dewatering deinking sludge utilizing a water soluble block copolymer having the structure: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R.sub.1 and R.sub.2 are the same or different and are H or a lower alkyl group from C.sub.1 to C.sub.3 and F is a salt of an ammonium cation. Preferably, the polymer contains from about 20 mole % to 35 mole % cationicity.
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Hobirk Richard A.
Sutman Frank J.
BetzDearborn Inc.
Morrison Betsey J.
Ricci Alexander D.
Von Neida Philip H.
Woo Jay H.
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