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    RECOVERY OF RARE EARTH METALS FROM COAL MINING SITES
    4.
    发明公开
    RECOVERY OF RARE EARTH METALS FROM COAL MINING SITES 审中-公开

    公开(公告)号：US20240209475A1

    公开(公告)日：2024-06-27

    申请号：US18283707

    申请日：2022-01-24

    申请人： Peter F. Santina

    发明人： Peter F. Santina ,  Gerald DeNeal

    IPC分类号： C22B59/00 ,  C22B3/06 ,  C22B3/24

    CPC分类号： C22B59/00 ,  C22B3/06 ,  C22B3/24

    摘要： Overburden from surface coal mining in many regions can produce a rain runoff laden with selenium, in the selenate form, as well as rare earth elements (REEs). This occurs from rainwater leaching through exposed selenium/mineral-containing rocks in the overburden. The mineral-containing runoff water is caught in ponds, or deep mine water is collected from pools. Alternatively, leachate can be collected from coal gob or refuse piles, or from a final cut lake resulting from a coal strip mining operation. Extraction of REEs, as well as remediation of deleterious substances such as selenium, is performed by treatment with sulfur-modified iron (SMI) in a contact bed of an upflow reactor vessel. After a period of use of the SMI, the spent SMI is subjected to a recovery process for REEs.

    Method for recovering gold and gold recovery facility
    8.
    发明授权
    Method for recovering gold and gold recovery facility 有权

    公开(公告)号：US11840744B2

    公开(公告)日：2023-12-12

    申请号：US16908003

    申请日：2020-06-22

    申请人： HYMO Corporation

    发明人： Ryuichi Ansai ,  Fumi Oono ,  Satoshi Sakuma ,  Fumiaki Satou ,  Akihiro Ishii ,  Yasuharu Mori

    IPC分类号： C22B11/00 ,  C22B3/24 ,  C22B3/26

    CPC分类号： C22B11/04 ,  C22B3/24 ,  C22B3/41

    摘要： Provided are a method for recovering gold, in which gold is recovered from a solution containing a gold cyano complex using a crosslinked resin containing a vinyl amine unit, by which gold can be efficiently recovered from the solution not only in a case (A) where a concentration of the gold cyano complex in the solution is low but also in a case (B) where another metal is dissolved in the solution; a method for recovering gold, in which the crosslinked resin and the solution are brought into contact with each other to separate the crosslinked resin and the solution from each other, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B); and a gold recovery facility comprising: a container inside which the crosslinked resin is accommodated in a flowable manner; and a device which feeds the solution to the container, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B).