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:
Aug. 11, 2015
Filed:
Mar. 13, 2013
Applicant:
Nalco Company, Naperville, IL (US);
Inventors:
Assignee:
NALCO COMPANY, Naperville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 7/02 (2006.01); C22B 21/00 (2006.01); C01F 7/06 (2006.01); C01F 7/14 (2006.01); C01F 7/47 (2006.01);
U.S. Cl.
CPC ...
C22B 21/0015 (2013.01); C01F 7/0653 (2013.01); C01F 7/145 (2013.01); C01F 7/148 (2013.01); C01F 7/473 (2013.01);
Abstract
The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more cross-linked ethylsulfonated polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides include cross-linked dextran or cross-linked dihydroxypropyl cellulose. The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.