Title:
PRODUCTION METHOD FOR LITHIUM-CONTAINING SOLUTION
Document Type and Number:
WIPO Patent Application WO/2020/116607
Kind Code:
A1
Abstract:
Provided is a method for producing a lithium-containing solution such that efficiency of an elution step is maintained and the overall lithium manganate is not dissolved. This lithium-containing solution production method executes, in order: an adsorption step in which a low lithium-containing fluid is caused to come in contact with a lithium adsorbent and converted to a post-adsorption lithium manganate, said lithium adsorbent being obtained from lithium manganate; an elution step in which the post-adsorption lithium manganate is caused to come in contact with an acid solution and a solution containing lithium having residual manganese is obtained; and a manganese oxidation step in which the manganese is oxidized and a lithium-containing solution having suppressed manganese concentration is obtained. The acid solution is a hydrochloric acid solution of 0.5–4.0 mol/L. As a result of this production method, the efficiency of exchange reactions between Li+ and H+ positive ions during the elution step is maintained and dissolution of the whole lithium manganate is suppressed. This enables a lithium adsorbent to be repeatedly used.
Inventors:
TAKANO MASATOSHI (JP)
ASANO SATOSHI (JP)
IKEDA OSAMU (JP)
MATSUMOTO SHIN-YA (JP)
KUDO YOHEI (JP)
ASANO SATOSHI (JP)
IKEDA OSAMU (JP)
MATSUMOTO SHIN-YA (JP)
KUDO YOHEI (JP)
Application Number:
PCT/JP2019/047811
Publication Date:
June 11, 2020
Filing Date:
December 06, 2019
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C01G45/12; B01D15/36; B01J20/06; C01D15/08; C02F1/42
Foreign References:
| CN101597689A | 2009-12-09 | |||
| JP2004010929A | 2004-01-15 | |||
| JP2015020090A | 2015-02-02 | |||
| JP3388406B2 | 2003-03-24 |
Other References:
001, KENTA ET AL.: "Modelling of column lithium desorption from Li+-loaded adsorbent obtained by adsorption from salt brine", HYDROMETALLURGY, vol. 169, 2017, pages 31 - 40, XP085010981, DOI: 10.1016/j.hydromet.2016.11.012
TANG WEIPING: "Lithium Recovery System from brine", 11 June 2010, KAGAWA INDUSTRY SUPPORT FOUNDATION
See also references of EP 3892588A4
TANG WEIPING: "Lithium Recovery System from brine", 11 June 2010, KAGAWA INDUSTRY SUPPORT FOUNDATION
See also references of EP 3892588A4
Attorney, Agent or Firm:
YAMAUCHI PATENT ATTORNEYS (JP)
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