Method for recovering valuable metals from spent lithium ion batteries

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United States of America Patent

PATENT NO 12113187
APP PUB NO 20240063455A1
SERIAL NO

18498037

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Abstract

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The present invention provides a method for recovering valuable metals from waste lithium ion batteries. The method comprises: short-circuit discharging, dismantling, crushing, roasting, and screening on waste lithium ion batteries to obtain active electrode powders; using alkaline solution to wash the active electrode powders, then filtering to remove copper and aluminum; drying the activated electrode powder after alkaline washing treatment, mix the dried activated electrode powder with starch and concentrated sulfuric acid and stir evenly to obtain the mixed material; calcining the mixed material with controlling the atmosphere; taking out the product obtained from calcination and using deionized water to extract the leachate and leaching residue with valence metal ions, and then obtaining the leachate after filtering. The present invention can reduce the concentration of impurity ions in the leaching solution, improve the purity and comprehensive recovery rate of valuable metals, and reduce the recovery cost.

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Patent Owner(s)

Patent OwnerAddress
GEM CO LTDNUMBER 2008 20F BLOCK A MARINA BAY CENTER SOUTH OF XINGHUA RD BAO'AN CENTER SHENZHEN
JINGMEN GEM CO LTDNO 3 YINGCHUN AVENUE DUODAO DISTRICT JINGMEN HIGH TECH ZONE JINGMEN CITY HUBEI PROVINCE 448124 JINGMEN CITY HUBEI PROVINCE 448124

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Yongan Jingmen, CN 1 0
Jiang, Liangxing Jingmen, CN 1 0
Lai, Yanqing Jingmen, CN 3 0
Li, Chenwei Shenzhen, CN 3 2
Xu, Kaihua Shenzhen, CN 22 25
Yang, Jian Jingmen, CN 606 6431
Zhang, Kun Shenzhen, CN 361 3138

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