US 11,655,150 B2
Preparation method for lithium phosphate, preparation method for lithium hydroxide, and preparation method for lithium carbonate
Hyun Woo Lee, Pohang-si (KR); Woonkyoung Park, Pohang-si (KR); Heok Yang, Pohang-si (KR); Kwang Seok Park, Pohang-si (KR); Seung Taek Kuk, Pohang-si (KR); Ki Young Kim, Pohang-si (KR); Sang Gil Lee, Pohang-si (KR); Woo Chul Jung, Pohang-si (KR); Gi-Chun Han, Cheongju-si (KR); Juyoung Kim, Pohang-si (KR); Young-Seon Ko, Seoul (KR); and Jin Yeop Wi, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR); and RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR)
Appl. No. 16/956,836
Filed by POSCO, Pohang-si (KR); and RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR)
PCT Filed Dec. 18, 2018, PCT No. PCT/KR2018/016142
§ 371(c)(1), (2) Date Jun. 22, 2020,
PCT Pub. No. WO2019/124941, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 10-2017-0178668 (KR), filed on Dec. 22, 2017; application No. 10-2017-0178669 (KR), filed on Dec. 22, 2017; application No. 10-2017-0178811 (KR), filed on Dec. 22, 2017; and application No. 10-2017-0180117 (KR), filed on Dec. 26, 2017.
Prior Publication US 2020/0407225 A1, Dec. 31, 2020
Int. Cl. C01D 15/08 (2006.01); C01B 25/30 (2006.01); B01D 15/00 (2006.01); B01D 21/01 (2006.01); B01D 61/44 (2006.01); B01J 20/08 (2006.01); B01J 20/28 (2006.01); B01J 20/34 (2006.01); C01D 15/02 (2006.01)
CPC C01B 25/30 (2013.01) [B01D 15/00 (2013.01); B01D 21/01 (2013.01); B01D 61/445 (2013.01); B01J 20/08 (2013.01); B01J 20/2803 (2013.01); B01J 20/28016 (2013.01); B01J 20/3433 (2013.01); B01J 20/3475 (2013.01); C01D 15/02 (2013.01); C01D 15/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing lithium phosphate, comprising:
passing a lithium-containing solution through an aluminum-based adsorbent to adsorb lithium on the aluminum-based adsorbent;
passing distilled water or an aqueous solution having a lower lithium concentration than the lithium-containing solution through the aluminum-based adsorbent on which the lithium is adsorbed to obtain a lithium-containing desorption solution;
putting a phosphorous supplying material in the lithium-containing desorption solution to obtain lithium phosphate;
removing impurities in the lithium-containing desorption solution before the step of putting a phosphorous supplying material in the lithium-containing desorption solution to obtain lithium phosphate,
wherein the concentration of lithium comprised in the lithium-containing desorption solution is in the range of 0.8 g/L to 1.5 g/L.