公开(公告)号：US20230191361A1

公开(公告)日：2023-06-22

申请号：US18084089

申请日：2022-12-19

Applicant: BYD COMPANY LIMITED

Inventor： Xiyu WANG ,  Hongye LIN ,  Junlan LIAN

IPC: B01J20/06 ,  B01J20/04 ,  B01J20/28 ,  B01J20/30

CPC classification number: B01J20/06 ,  B01J20/041 ,  B01J20/28007 ,  B01J20/28071 ,  B01J20/28057 ,  B01J20/3078

Abstract: In order to resolve the problem that a magnetic lithium adsorbent in the related art is difficult to be used for lithium extraction from strong-alkaline and carbonate-type brines, a magnetic titanium-based lithium adsorbent is provided, which includes a magnetic composite and a lithium adsorption layer. The lithium adsorption layer is disposed at an outer surface of the magnetic composite. The magnetic composite includes a magnetic material and a titanium oxide. The lithium adsorption layer includes a lithium titanium oxide.

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.