US 12,662,389 B2
Method for producing lithium-containing solution
Osamu Ikeda, Niihama (JP); Masatoshi Takano, Niihama (JP); Satoshi Asano, Niihama (JP); Shin-ichi Heguri, Niihama (JP); Shin-ya Matsumoto, Niihama (JP); Yohei Kudo, Niihama (JP); Yusuke Senba, Niihama (JP); and Kyohei Maeda, Niihama (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Appl. No. 17/923,111
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
PCT Filed Mar. 30, 2022, PCT No. PCT/JP2022/015851
§ 371(c)(1), (2) Date Nov. 3, 2022,
PCT Pub. No. WO2022/210847, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-059031 (JP), filed on Mar. 31, 2021.
Prior Publication US 2023/0174385 A1, Jun. 8, 2023
Int. Cl. C01D 15/04 (2006.01); B01J 39/02 (2006.01); B01J 39/10 (2006.01); B01J 49/53 (2017.01); C01G 45/01 (2025.01); C01G 45/02 (2025.01); C01G 45/1221 (2025.01); C22B 3/24 (2006.01); C22B 3/44 (2006.01); C22B 26/12 (2006.01)
CPC C01D 15/04 (2013.01) [B01J 39/02 (2013.01); B01J 39/10 (2013.01); B01J 49/53 (2017.01)] 2 Claims
OG exemplary drawing
 
1. A method for producing a lithium-containing solution, comprising:
an adsorption step of bringing a lithium adsorbent obtained from lithium manganese oxide in contact with a lithium-containing solution to obtain post-adsorption lithium manganese oxide;
an eluting step of bringing the post-adsorption lithium manganese oxide in contact with an acid-containing solution to obtain an eluted solution; and
a manganese oxidation step of oxidating manganese by adding an oxidant and a pH adjuster to the eluted solution to obtain a lithium-containing solution with a suppressed manganese concentration, wherein
the adsorption step, the eluting step, and the manganese oxidation step are performed in this order, and
the acid-containing solution includes the eluted solution with acid added, and wherein:
in the manganese oxidation step, the oxidant is selected from the group consisting of sodium hypochlorite, sodium chlorite, ozone, and permanganate.