The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2024
Filed:
Oct. 31, 2023
Gem Co., Ltd., Shenzhen, CN;
Jingmen Gem Co., Ltd., Jingmen, CN;
Kaihua Xu, Shenzhen, CN;
Liangxing Jiang, Jingmen, CN;
Jian Yang, Jingmen, CN;
Kun Zhang, Shenzhen, CN;
Chenwei Li, Shenzhen, CN;
Yongan Chen, Jingmen, CN;
Yanqing Lai, Jingmen, CN;
GEM CO., LTD., Shenzhen, CN;
JINGMEN GEM CO., LTD., Jingmen, CN;
Abstract
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.