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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 8003066 B1

PDFFull Text
Date of Patent:
Aug. 23, 2011

Filed:

Sep. 25, 2008

Method for scrubbing amine-type extractant

Applicants:

Hiroshi Kobayashi, Niihama, JP;

Hirofumi Shoji, Niihama, JP;

Inventors:

Hiroshi Kobayashi, Niihama, JP;

Hirofumi Shoji, Niihama, JP;

Assignee:

Sumitomo Metal Minning Co., Ltd., Tokyo, JP;

Attorney:

Edwards Angell Palmer & Dodge LLP

Primary Examiner:

Lorna M Douyon

Assistant Examiner:

Tanisha Diggs

Int. Cl.
CPC ...
B01D 11/00 (2006.01); B01D 15/04 (2006.01); C01G 3/00 (2006.01); C01G 5/00 (2006.01); C01G 7/00 (2006.01); C01G 1/00 (2006.01); C01G 49/00 (2006.01); C01G 51/00 (2006.01); C01G 53/00 (2006.01); C22B 11/00 (2006.01); C22B 15/00 (2006.01); C22B 1/00 (2006.01); C22B 23/00 (2006.01); B01F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent extraction step, characterized by substituting a chloride ion of the amine, which is added with hydrochloric acid, with sulfuric acid ion, by bringing the amine extractant (A) into contact with a sulfuric acid solution with a concentration of 3 to 10 N, and subsequently, by eliminating a metal by bringing the substituted amine extractant (B) into contact with water.

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Kobayashi, Hiroshi. (2011). Method for scrubbing amine-type extractant (U.S. Patent No. 8003066). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8003066

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