	US 11,939,645 B2
	Method for extracting lithium from carbonate clay type lithium ore based on ion exchange
Hanjie Wen, Guiyang (CN); Hannian Gu, Guiyang (CN); Li Zhu, Baiguo Town (CN); Chongguang Luo, Guiyang (CN); and Shengjiang Du, Guiyang (CN)
Assigned to INSTITUTE OF GEOCHEMISTRY, CHINESE ACADEMY OF SCIENCES, Guiyang (CN)
Appl. No. 17/056,099
Filed by Institute of Geochemistry, Chinese Academy of Sciences, Guiyang (CN)
PCT Filed Apr. 3, 2020, PCT No. PCT/CN2020/083183 § 371(c)(1), (2) Date Nov. 17, 2020, PCT Pub. No. WO2021/036263, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910788413.3 (CN), filed on Aug. 26, 2019.
Prior Publication US 2022/0186341 A1, Jun. 16, 2022
Int. Cl. C22B 26/12 (2006.01); C22B 1/02 (2006.01); C22B 3/42 (2006.01)

CPC C22B 26/12 (2013.01) [C22B 1/02 (2013.01); C22B 3/42 (2013.01)]

8 Claims

1. A method for extracting lithium from carbonate clay type lithium ore based on ion exchange, the method comprising the following steps:

(1) Crushing: having lithium ore crushed and finely ground;

(2) Roasting treatment: having crushed ore roasted at a temperature of 450-800° C.;

(3) Iron exchange: adding a solution of ferric iron salt to the ore treated as specified in Step (2), and then conducting iron exchange reaction while stifling;

(4) Filtration and separation: conducting solid-liquid separation immediately after the completion of reaction, the filtrate obtained being a lithium-bearing solution.