公开(公告)号：US20220364203A1

公开(公告)日：2022-11-17

申请号：US17773253

申请日：2020-05-29

申请人： Korea Institute Of Geoscience And Mineral Resources

发明人： In Su PARK ,  Hye-Jin HONG ,  Chang-Youl SUH ,  Sukjoon PARK ,  Myunggyu LEE

IPC分类号： C22B26/12 ,  C22B3/08 ,  C01D15/06 ,  C02F1/52 ,  C01F7/14 ,  C22B3/44 ,  C22B3/22

摘要： The present invention relates to a method for recovering lithium from brine, and provides a method for recovering lithium from brine, the method comprising: (a) an impurity removal step of adding a carbonate supply source to brine including lithium, magnesium and calcium to precipitate and remove magnesium and calcium impurities; (b) a pH adjusting step of adding an acid to the brine from which the impurities have been removed, to adjust the pH of the brine; (c) a lithium-aluminum compound recovery step of adding an aluminum supply source to the pH-adjusted brine to recover a lithium-aluminum compound; (d) a lithium sulfate and aluminum oxide formation step of adding the lithium-aluminum compound to a sulfur supply source and calcining same to form lithium sulfate and aluminum oxide; and (e) a lithium sulfate solution yield step of selectively dissolving lithium sulfate from among the formed lithium sulfate and aluminum oxide to yield a lithium sulfate solution.