Aqueous suspensions of poly(ethylene oxide) useful as a floccule

Details Aqueous suspensions of poly(ethylene oxide) useful as a floccule Aqueous suspensions of poly(ethylene oxide) useful as a floccule

1996-08-26

1997-07-08

Czaja, Donald E.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210727, 210725, B03D 306

Patent

active

056457316

ABSTRACT:
A method is provided for using an aqueous suspension of at least 15% of poly(ethylene oxide)(PEO) as a flocculent. PEO is dispersed in an aqueous solution of at least one salt selected from the group consisting of sodium or potassium formate, sodium or potassium hydroxide, sodium or potassium citrate, sodium or potassium acetate, sodium chloride or mixtures thereof to form a poly(ethylene oxide) suspension having at least 15% of poly(ethylene oxide) by total weigh. This suspension is dissolved in an aqueous system; and said dissolved aqueous system is added in conjunction with a solution of a coagulant or synthetic flocculents selected from the group consisting of alum, polyaluminum chloride, sodium aluminates, polyamines, polyacrylamides, copolymers of acrylamide with cationic or anionic monomers, or polyethylene imine, to an aqueous slurry containing finely divided materials, whereby said dissolved aqueous dispersion enhances the separation of the finely divided materials from the liquid in the aqueous slurry.

REFERENCES:
patent: 4070236 (1978-01-01), Carrard et al.
patent: 5228908 (1993-07-01), Burdick et al.
patent: 5342538 (1994-08-01), Chung et al.
Tay, C. H. "Application of polymeric flocculant in newsprint stock systems for fines retention improvement", TAPPI J., vol. 63, No. 11, pp. 89-92 1984.

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