公开(公告)号：US20230097464A1

公开(公告)日：2023-03-30

申请号：US17868564

申请日：2022-07-19

Applicant: BYD COMPANY LIMITED

Inventor： Minghao WANG ,  Junlan LIAN ,  Hongye LIN

IPC: C22B26/12 ,  C22B3/24 ,  C22B3/44

Abstract: A method for recovering lithium from a lithium-containing solution is provided. A lithium-containing solution with an adjusted pH value or an unadjusted pH value is mixed with a meta-aluminate, and the pH value is adjusted to weak acid/neutral, so that lithium can be separated from the lithium-containing solution in the form of a precipitate of LiaX·2Al(OH)3·nH2O. Then, the precipitate is converted into a lithium adsorbent of (1-m)LiaX·2Al(OH)3·nH2O and a LiaX-containing filtrate through desorption of lithium. High-purity Li2CO3 is obtained by performing precipitation of lithium on the LiaX-containing filtrate.

公开(公告)号：US20230091794A1

公开(公告)日：2023-03-23

申请号：US17690326

申请日：2022-03-09

Applicant: BYD COMPANY LIMITED

Inventor： Minghao WANG ,  Junlan LIAN ,  Hongye LIN

IPC: B01J20/08 ,  B01J20/30 ,  B01J20/28

Abstract: A lithium ion adsorbent includes a material having a chemical formula of LiCl.2Al(OH)3.nH2O. n is an integer from 1 to 3, a specific surface area of the lithium ion adsorbent is 20-36 m2/g, an average pore diameter of the lithium ion adsorbent is 20-35 nm, a total pore volume of the lithium ion adsorbent is 0.15-0.32 mL/g, a D10 of the lithium ion adsorbent is 3-12 μm, a D50 of the lithium ion adsorbent is 12-22 μm, and a D90 of the lithium ion adsorbent is 20-40 μm.