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:
Oct. 29, 1985
Filed:
Mar. 15, 1984
Applicant:
Inventor:
Merle L Branning, Warrenville, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210728 ; 210734 ;
Abstract
A process of improving the flocculation activity of water-soluble anionic vinyl polymers used to flocculate suspended solids from aqueous systems, which aqueous systems also contain adverse amounts of calcium, magnesium, ferrous and/or ferric ions, the improvement which comprises performing the process in the presence of an effective amount of an alkali metal salt selected from the group consisting of alkali metal tetraborates, tribasic phosphates, permanganates and silicates.