SYSTEM AND METHOD FOR RECOVERING METAL FROM METAL-CONTAINING WASTE LIQUID
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United States of America Patent
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Mar 30, 2017
app pub date -
Apr 15, 2016
filing date -
Sep 29, 2015
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Abstract
Disclosed is a system for recovering metal from metal-containing waste liquid. The system includes a waste liquid storage unit, an extraction unit, and an electrolysis unit. The waste liquid storage unit is configured to store a metal-containing waste liquid. The extraction unit is in fluid connection with the waste liquid storage unit and includes an extraction device and a back-extraction device. The extraction device is configured to collect a target metal ion present in the metal-containing waste liquid, and the back-extraction device is configured to back-extract the target metal ion into a back-extracting liquid to form a metal compound. The electrolysis unit is in fluid connection with the waste liquid storage unit and the extraction unit, configured to reduce the target metal ion to a solid metal, or to dissociate the metal compound and deposit a solid metal.
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