Recovery of critical metals from SX-EW copper raffinate and other solutions derived from leaching ores with sulfuric acid
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United States of America Patent
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Nov 21, 2023
Grant Date -
Sep 9, 2021
app pub date -
Mar 4, 2021
filing date -
Mar 6, 2020
priority date (Note) -
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Abstract
A method for extracting secondary metal values from a sulfuric acid leachate is provided. The method includes providing a leachate which contains a primary metal and a plurality of secondary metals, wherein the primary metal is selected from the group consisting of Cu, Li and Ni and is derived from sulfuric acid leaching of an ore; passing the leachate through a first ion exchange resin which is selective to, and releasably binds, the plurality of secondary metals; stripping the plurality of secondary metals from the second or third ion exchange resins, thereby obtaining a first extract; and recovering the secondary metals from the first extract.
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