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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.:

US 10662499 B1

PDFFull Text
Date of Patent:
May. 26, 2020

Filed:

Mar. 18, 2016

Treatment of degraded oxime metal extractants in process organic solutions

Applicant:

Outotec (Finland) Oy, Espoo, FI;

Inventors:

James Kabugo, Pori, FI;

Erkki Paatero, Helsinki, FI;

Assignee:

OUTOTEC (FINLAND) OY, Espoo, FI;

Attorney:

Buchanan, Ingersoll & Rooney PC

Primary Examiner:

Clare M Perrin

Int. Cl.
CPC ...
C22B 3/24 (2006.01); C22B 3/00 (2006.01); C22B 3/26 (2006.01); C22B 3/12 (2006.01); B01J 20/20 (2006.01); B01J 20/16 (2006.01); B01J 20/14 (2006.01); B01J 20/06 (2006.01); B01F 17/00 (2006.01); B01F 13/10 (2006.01); B01F 15/02 (2006.01); C22B 3/30 (2006.01); B01D 15/02 (2006.01); C07C 249/08 (2006.01); C07C 249/14 (2006.01);
U.S. Cl.
CPC ...
C22B 3/24 (2013.01); B01D 15/02 (2013.01); B01F 13/1011 (2013.01); B01F 17/0042 (2013.01); B01J 20/06 (2013.01); B01J 20/14 (2013.01); B01J 20/16 (2013.01); B01J 20/20 (2013.01); C22B 3/0005 (2013.01); C22B 3/0017 (2013.01); C22B 3/0021 (2013.01); C22B 3/12 (2013.01); C22B 23/04 (2013.01); B01D 2215/029 (2013.01); B01F 2215/0036 (2013.01); B01J 2219/00029 (2013.01); B01J 2219/00033 (2013.01); C07C 249/08 (2013.01); C07C 249/14 (2013.01); Y02P 10/234 (2015.11);
Abstract

The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.

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