Title:
METHOD FOR EXTRACTION, ENRICHMENT AND RECOVERY OF RARE EARTHS FROM LOW-CONCENTRATION RARE EARTH SOLUTION
Document Type and Number:
WIPO Patent Application WO/2018/028543
Kind Code:
A1
Abstract:
A method for extraction, enrichment and recovery of rare earths from a low-concentration rare earth solution, using a non-saponification organic extractant to perform centrifugal extraction, obtaining an organic phase containing rare earths and a raffinate; using an inorganic acid to perform centrifugal back-extraction on the organic phase containing rare earths, obtaining a rare earth enriched liquid. Low-concentration rare earth solution indicates a rare earth solution having REO concentration of 0.05-8g/L. Single or dual coupled centrifugal extraction is performed, at an extraction mixing time of 5-60s. The present method has simple operation, protects the environment, and has a high rare earth recovery rate.
Inventors:
HUANG XIAOWEI (CN)
FENG ZONGYU (CN)
ZHAO LONGSHENG (CN)
DONG JINSHI (CN)
WANG LIANGSHI (CN)
XU YANG (CN)
CUI DALI (CN)
FENG ZONGYU (CN)
ZHAO LONGSHENG (CN)
DONG JINSHI (CN)
WANG LIANGSHI (CN)
XU YANG (CN)
CUI DALI (CN)
Application Number:
PCT/CN2017/096222
Publication Date:
February 15, 2018
Filing Date:
August 07, 2017
Export Citation:
Assignee:
GRIREM ADVANCED MAT CO LTD (CN)
International Classes:
C22B59/00; C22B3/26
Foreign References:
| CN104294063A | 2015-01-21 | |||
| CN101824535A | 2010-09-08 | |||
| CN101050488A | 2007-10-10 | |||
| EP2910654A1 | 2015-08-26 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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