Process for flocculating suspensions
AssigneeCiba Specialty Chemicals Water Treatments Ltd.
InventorsSteven Weir, Mark John Stringer
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Abstract
A process of flocculating and dewatering an aqueous suspension of suspended solids comprising, introducing into the suspension, (a) a concentrated polymer solution and, (b) a dilute polymer solution, characterised in that the concentrated and dilute polymer solutions are introduced into the substrate substantially simultaneously. Preferably the concentrated and dilute polymer solutions are introduced into the suspension as an aqueous composition comprising a dilute aqueous solution of polymer and a concentrated solution of polymer. The process brings about improvements in filtration and cake solids.
Claims17
A process of flocculating and dewatering an aqueous suspension of suspended solids comprising, introducing into the suspension an aqueous composition comprising,
- (a) a concentrated aqueous polymeric flocculant solution having a concentration above about 0.3% by weight and
- (b) a dilute aqueous polymeric flocculant solution having a concentration below about 0.3% by weight, characterised in that the concentrated and dilute polymeric flocculant solutions are introduced into the suspension substantially simultaneously and the dilute solution and concentrated solution exist as substantially discrete components of a non-homogeneous composition, to flocculate said suspended solids, and dewatering said aqueous suspension.
Dependencies are inferred from the claim text.