METHOD FOR RECOVERING SCANDIUM, AND ION EXCHANGE METHOD

WIPO Patent Application WO/2021/059940

A1

The present invention provides a method for recovering scandium from an acidic solution, which contains at least scandium, nickel and chromium, through an ion exchange treatment using a chelating resin, said method recovering high-purity scandium by suppressing adsorption of impurities onto the chelating resin.　According to the present invention, a method for recovering scandium from an acidic solution, which contains at least scandium, nickel and chromium, comprises an ion exchange treatment step S2 wherein the acidic solution is passed through a column that is filled with a chelating resin, thereby having the scandium in the acidic solution adsorb onto the chelating resin and subsequently obtaining a scandium eluent. In the ion exchange treatment step S2, the length of move per unit time (linear velocity) within the column is regulated during the time when the acidic solution is passed through the column.

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KOBAYASHI HIROSHI (JP)
NAKAI OSAMU (JP)
OHARA GO (JP)

PCT/JP2020/033773

April 01, 2021

September 07, 2020

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SUMITOMO METAL MINING CO (JP)

C22B59/00; B01J45/00; B01J47/14; B01J49/05; B01J49/50; C22B3/08; C22B3/24; C22B3/42; C22B3/44

JP2017150019A	2017-08-31
JP2015163729A	2015-09-10
JP2014218719A	2014-11-20
JP2016065283A	2016-04-28
JP2014177391A	2014-09-25
JP2015040332A	2015-03-02
JPS6389635A	1988-04-20
JPS504847A	1975-01-18
JPH107407A	1998-01-13

SHOBAYASHI Masayuki et al. (JP)

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