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Title:
METHOD FOR RECOVERING RARE EARTH BY FRACTIONAL EXTRACTION
Document Type and Number:
WIPO Patent Application WO/2016/106732
Kind Code:
A1
Abstract:
Disclosed is a method for recovering rare earth by fractional extraction. The method comprises the following steps: using a rare earth solution containing medium-heavy rare earth as a raw liquid with a pH value of 2.5-5.5, performing a first extraction on the raw liquid with a first organic phase of an acidic phosphorus extraction agent having a pKa value >4, while keeping the balanced acidity of the extraction aqueous phase in 1

Inventors:
HUANG, Xiaowei (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
WANG, Liangshi (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
FENG, Zongyu (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
DONG, Jinshi (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
WANG, Meng (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
XIAO, Yanfei (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
CUI, Dali (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
Application Number:
CN2014/096023
Publication Date:
July 07, 2016
Filing Date:
December 31, 2014
Export Citation:
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Assignee:
GRIREM ADVANCED MATERIALS CO., LTD. (No.2, Xinjiekouwai Street, Beijing 8, 100088, CN)
International Classes:
C22B3/26; C22B3/38; C22B59/00
Foreign References:
CN101050488A2007-10-10
CN102443699A2012-05-09
CN101294244A2008-10-29
CN101319276A2008-12-10
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (Floor 16, Tower A Indo Building,A48 Zhichun Road, Haidian District, Beijing 8, 100098, CN)
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