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:
Nov. 03, 2015
Filed:
Oct. 29, 2012
Applicant:
Nalco Company, Naperville, IL (US);
Inventors:
Assignee:
NALCO COMPANY, Naperville, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 37/03 (2006.01); B01D 37/04 (2006.01); B01D 21/01 (2006.01); C01F 7/14 (2006.01); C01F 7/06 (2006.01); C01F 7/47 (2006.01);
U.S. Cl.
CPC ...
C01F 7/145 (2013.01); B01D 21/01 (2013.01); B01D 37/03 (2013.01); B01D 37/04 (2013.01); C01F 7/0653 (2013.01); C01F 7/148 (2013.01); C01F 7/47 (2013.01);
Abstract
The invention provides methods and compositions for improving the production of alumina trihydrate. The invention involves adding one or more cross-linked polysaccharides to a filter used to separate solids from liquid in the Bayer process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The cross-linked polysaccharides can impart a number of advantages including greater flow rate and lower residual moisture in the resulting cake.