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    PROCESSES FOR PRODUCING LITHIUM COMPOUNDS USING FORWARD OSMOSIS
    1.
    发明申请
    PROCESSES FOR PRODUCING LITHIUM COMPOUNDS USING FORWARD OSMOSIS 有权

    公开(公告)号：US20220105466A1

    公开(公告)日：2022-04-07

    申请号：US17644535

    申请日：2021-12-15

    申请人： Terralithium LLC

    发明人： Stephen Harrison ,  Dennis L. Howe ,  Brian J. Dougherty

    IPC分类号： B01D61/00 ,  C01D15/00 ,  B01D15/08

    摘要： Systems, methods and apparatuses to concentrate lithium containing solutions using forward osmosis units are provided, which, for example, can include providing at least one forward osmosis unit having at least one lithium containing solution chamber having at least one first inlet and at least one first outlet, at least one brine chamber having at least one second inlet and at least one second outlet, and at least one selectively permeable membrane positioned between the at least one lithium containing solution chamber and the at least one brine chamber, and conveying a lithium containing solution through the at least one lithium containing solution chamber and a concentrated brine solution through the at least one brine chamber, said conveying causing water from the lithium containing solution to be drawn through the at least one selectively permeable membrane and into the concentrated brine solution, such that a concentrated lithium containing solution exits through the first outlet and a less concentrated brine solution exits through the second outlet.

    Processes for producing lithium compounds using reverse osmosis
    6.
    发明授权
    Processes for producing lithium compounds using reverse osmosis 有权

    公开(公告)号：US11174532B1

    公开(公告)日：2021-11-16

    申请号：US16297476

    申请日：2019-03-08

    申请人： TERRALITHIUM LLC

    发明人： Stephen Harrison ,  Brian J. Dougherty

    IPC分类号： C22B26/12 ,  B01D61/02 ,  B01J20/08 ,  B01J20/34 ,  C25B1/16

    摘要： Provided are methods of extracting lithium from a lithium containing solution, as well as the resulting compositions. The method includes supplying a lithium containing solution to a lithium capture step, the lithium capture step being operable to capture lithium from the lithium salt containing solution. The method further includes recovering lithium from the lithium capture step to produce a lithium rich stream. In especially preferred methods, the lithium capture step is performed to increase the lithium to sodium ratio above at least 1:1. Optionally, the lithium rich stream can be purified to remove divalent ions and borate ions. The lithium rich stream is then concentrated by supplying the lithium rich stream to a reverse osmosis step to produce a concentrated lithium rich stream.