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Method for extracting rare earth metals 发明授权

2023-03-03 3730 943K 0

专利信息

申请日期 2025-07-10 申请号 US17316397
公开(公告)号 US11230753B1 公开(公告)日 2022-01-25
公开国别 US 申请人省市代码 全国
申请人 Peter F Santina
简介 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. 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.


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