The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 1997
Filed:
Aug. 26, 1996
Charles Lee Burdick, Landenberg, PA (US);
Elliott Echt, Wilmington, DE (US);
Hercules Incorporated, Wilmington, DE (US);
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.