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:
Mar. 20, 2018
Filed:
Jun. 21, 2013
Applicant:
Bhp Billiton Ssm Development Pty Ltd, Perth, Western Australia, AU;
Inventors:
Renato Antonio Loaiza Aguilar, Cordobo, CO;
Carolina Isabel Meneses Rodríguez, Cordobo, CO;
Ruben Rangel De Hoyos, Cordobo, CO;
Houyuan Liu, Henderson, NV (US);
Assignee:
CERRO MATOSO SA, Bogota, CO;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22B 3/44 (2006.01); C22B 3/00 (2006.01); B01D 9/00 (2006.01); C22B 3/26 (2006.01); C22B 3/42 (2006.01);
U.S. Cl.
CPC ...
C22B 3/44 (2013.01); B01D 9/0036 (2013.01); B01D 9/0059 (2013.01); C22B 3/0005 (2013.01); C22B 3/42 (2013.01); C22B 23/0461 (2013.01); Y02P 10/234 (2015.11);
Abstract
A process for the removal of ferric iron as hematite from a nickel solution containing ferric and ferrous ions including the steps of: raising the temperature of the nickel solution to between 90° C. and the boiling point of the solution at atmospheric pressure; raising the pH of the nickel solution to be between 2 and 3; and adding a hematite seed to facilitate hematite precipitation, wherein ferric ions are precipitated as hematite in a predominantly crystalline form.