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:
Apr. 12, 1994
Filed:
Mar. 01, 1993
Applicant:
Inventors:
Edwin E Tucker, Norman, OK (US);
Sherril D Christian, Norman, OK (US);
John F Scamehorn, Norman, OK (US);
Assignee:
Board of Regents of the University of Oklahoma, Norman, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210638 ; 210639 ; 210651 ; 210913 ;
Abstract
A method for removing toxic anions from water is provided. A complexing agent, such as a cationic polyelectrolyte, is added to untreated water. The cationic polyelectrolyte complexes with anions, such as chromate, and the complex is filtered out of the water. The complex is then treated with barium chloride, lead chloride, aluminum, iron, or zinc to precipitate chromium ions and to regenerate the complexing agent. The regenerated complexing agent can be reused for water treatment.