ALLOY TREATMENT METHOD - SUMITOMO METAL MINING CO

Title:

ALLOY TREATMENT METHOD

Document Type and Number:

WIPO Patent Application WO/2021/193096

Kind Code:

A1

Abstract:

Provided is an alloy treatment method comprising separating copper and zinc from an alloy containing nickel and/or cobalt and also containing copper and zinc to obtain nickel and/or cobalt selectively.　An alloy treatment method is provided, in which a solution containing nickel and/or cobalt is obtained from an alloy containing nickel and/or cobalt and also containing copper and zinc, the method comprising: a leaching step for subjecting the alloy to a leaching treatment with an acid under the condition where a sulfating agent is present to produce a leachate; a reduction step for subjecting the leachate to a reduction treatment using a reducing agent to produce a reduced solution; an oxidation/neutralization step for adding an oxidizing agent and a neutralizing agent to the reduced solution to produce a neutralized solution containing nickel and/or cobalt and also containing zinc; and a solvent extraction step for subjecting the neutralized solution to a solvent extraction procedure using an acidic phosphorus compound-based extractant to produce a solution containing nickel and/or cobalt.

Inventors:

KUDOU KEIJI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
TAKENOUCHI HIROSHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)

Application Number:

PCT/JP2021/009778

Publication Date:

September 30, 2021

Filing Date:

March 11, 2021

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

B09B3/00; C22B3/06; C22B3/38; C22B3/44; C22B7/00; C22B19/00; C22B23/00; H01M10/54

Foreign References:

JP2015183292A	2015-10-22
JP2016033232A	2016-03-10
JP2012172169A	2012-09-10

Other References: