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. 01, 2024
Filed:
May. 11, 2023
Chongqing Shangjia Electronic Co., Ltd., Chongqing, CN;
Chongqing University, Chongqing, CN;
Liang Fu, Chongqing, CN;
Shuchun Li, Chongqing, CN;
Fusheng Pan, Chongqing, CN;
Hualin Xie, Chongqing, CN;
Xinren Liao, Chongqing, CN;
Juncai Ma, Chongqing, CN;
Ping Li, Chongqing, CN;
Zhan Xu, Chongqing, CN;
CHONGQING SHANGJAI ELECTRONIC, Chongqing, CN;
CHONGQING UNIVERSITY, Chongqing, CN;
Abstract
Provided are a method and molten salt system for recovering rare earth elements from NdFeB waste and use of ferric oxide as a raw material of a manganese-zinc ferrite. The molten salt system comprising the following components in percentage by weight: 40% of KAlFor NaAlF, 40% of KBeF, and 20% of KAlF. By adopting the three-component molten salt system of the present invention, recovery rates of rare earth elements extracted from NdFeB waste all can reach 98% or above. By adopting the three-component molten salt system, extraction temperature is 100-400° C. lower than that of all current similar halogenation methods, and extraction time is fold shorted to 1-3 h. The reduction of the extraction temperature and the shortening of the melting time greatly reduce the energy consumption of extracting rare earth elements from NdFeB waste, and the economic benefits are remarkable.