METHOD FOR RECOVERING SCANDIUM - SUMITOMO METAL MINING CO

Title:

METHOD FOR RECOVERING SCANDIUM

Document Type and Number:

WIPO Patent Application WO/2016/151959

Kind Code:

A1

Abstract:

Provided is a method for recovering scandium, which enables easy and efficient recovery of high-quality scandium from an acidic solution containing scandium. According to this method for recovering scandium, an acidic solution containing scandium is used and a scandium dissolution liquid after purification is obtained by a double sulfate precipitation step including the steps [A]-[C] described below, and scandium is then recovered from the thus-obtained scandium dissolution liquid. [A] A precipitation step wherein sodium sulfate is added into the acidic solution containing scandium, so that a precipitate of a scandium double sulfate is obtained [B] A neutralization step wherein pure water is added to the precipitate of a scandium double sulfate obtained in the precipitation step so as to dissolve the precipitate of a scandium double sulfate therein, and scandium hydroxide is obtained by adding a neutralizing agent into the thus-obtained dissolution liquid [C] A re-dissolution step wherein an acid is added to the scandium hydroxide obtained in the neutralization step, so that a scandium dissolution liquid after purification, in which the scandium hydroxide is dissolved, is obtained

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Inventors:

NAGAI HIDEMASA (JP)
KUDO KEIJI (JP)
MATSUMOTO SHIN-YA (JP)
KOBAYASHI HIROSHI (JP)
ASANO SATOSHI (JP)

Application Number:

PCT/JP2015/084409

Publication Date:

September 29, 2016

Filing Date:

December 08, 2015

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

C22B59/00; C01F17/13; C01F17/212; C01F17/271; C01F17/276; C01F17/282; C22B3/08; C22B3/24; C22B3/44

Foreign References:

JPS5489904A	1979-07-17
JP2014218719A	2014-11-20
JP2004175652A	2004-06-24

Other References: