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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 8974673 B1

PDFFull Text
Expired
Date of Patent:
Mar. 10, 2015

Filed:

May. 26, 2010

Method of regeneration an organic extraction solution that has been used in a liquid-liquid extraction process

Applicants:

Erkki Paatero, Helsinki, FI;

Kai Jyrkkä, Kokkola, FI;

Sami Virolainen, Lappeenranta, FI;

Inventors:

Erkki Paatero, Helsinki, FI;

Kai Jyrkkä, Kokkola, FI;

Sami Virolainen, Lappeenranta, FI;

Assignee:

Outotec Oyj, Espoo, FI;

Attorney:

Buchanan, Ingersoll & Rooney PC

Primary Examiner:

Matthew O Savage

Int. Cl.
CPC ...
B01D 15/00 (2006.01); C22B 3/30 (2006.01); C22B 3/02 (2006.01); C07C 249/14 (2006.01); B01F 7/00 (2006.01); B01F 7/24 (2006.01); B01F 13/10 (2006.01); C07C 249/08 (2006.01); C22B 3/26 (2006.01); C22B 15/00 (2006.01);
U.S. Cl.
CPC ...
C22B 3/02 (2013.01); C07C 249/14 (2013.01); B01F 7/00441 (2013.01); B01F 7/24 (2013.01); B01F 13/1013 (2013.01); B01F 13/1016 (2013.01); C07C 249/08 (2013.01); C22B 3/0005 (2013.01); C22B 3/0017 (2013.01); C22B 3/0032 (2013.01); C22B 15/0084 (2013.01); C22B 15/0089 (2013.01);
Abstract

The invention relates to a method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound 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 reaction stage and the adsorptive stage are carried out in a mixing tank.

Find Patent Forward Citations

Paatero, Erkki. (2015). Method of regeneration an organic extraction solution that has been used in a liquid-liquid extraction process (U.S. Patent No. 8974673). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8974673

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