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. 26, 2016
Filed:
Jan. 06, 2012
Applicants:
Sheila St. Amour, Schereville, IN (US);
Jan Pavlicek, Detroit, MI (US);
Inventors:
Sheila St. Amour, Schereville, IN (US);
Jan Pavlicek, Detroit, MI (US);
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/52 (2006.01); C02F 1/62 (2006.01); C02F 1/56 (2006.01); C02F 1/66 (2006.01); C01G 23/047 (2006.01); C02F 1/02 (2006.01); C02F 101/20 (2006.01);
U.S. Cl.
CPC ...
C02F 1/52 (2013.01); C02F 1/02 (2013.01); C02F 1/5245 (2013.01); C02F 1/56 (2013.01); C02F 1/66 (2013.01); C01G 23/0475 (2013.01); C02F 2101/20 (2013.01);
Abstract
A process is provided for removing metal salt co-constituents from an iron-containing solution comprising: (a) decreasing the free acidity of the solution to produce a slurry; (b) optionally heating the solution or the slurry to a temperature at least 30° C.; (c) optionally aging the slurry; (d) adding one or more cationic polyelectrolyte flocculants to the slurry; and (e) separating a solid-containing portion from a liquid portion of the slurry.