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:
Jan. 03, 1989
Filed:
Apr. 24, 1987
Applicant:
Inventor:
Larry W Becker, Marcellus, NY (US);
Assignee:
General Chemical Corporation, Morristown, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
252181 ; 210702 ; 210716 ; 210723 ; 252175 ; 423462 ; 423629 ; 524437 ; 524557 ;
Abstract
Polyvinyl alcohol (PVA) can be effectively utilized as a floc conditioner during the formation of polyaluminum chloride. The polyvinyl alcohol can be effectively incorporated into the composition either before basification (pre-addition) or afterwards (post-addition). When added to concentrated aluminum containing solutions (8-9% Al.sub.2 O.sub.3), polyvinyl alcohol is preferably used at concentrations up to about 2500 ppm. Higher concentrations may exhibit overdose behavior with progressively decreasing effectiveness. The preferred dosage is about 1750 ppm of PVA for synthetic laboratory water.