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Title:
METHOD FOR GROUPING AND SEPARATING YTTRIUM OXIDE FROM HIGH-YTTRIUM RARE EARTH ORE AND METHOD FOR GROUPING AND SEPARATING YTTRIUM OXIDE FROM MIDDLE-YTTRIUM EUROPIUM-RICH RARE EARTH ORE
Document Type and Number:
WIPO Patent Application WO/2020/211304
Kind Code:
A1
Abstract:
A method for grouping and separating yttrium oxide from high-yttrium rare earth ore and a method for grouping and separating yttrium oxide from middle-yttrium europium-rich rare earth ore, relating to the technical field of rare earth extraction and separation, and solving the problems of naphthenic acid needing to be replaced and the difficulty of quickly analysing the concentration changes of two extractants in a HAB system on site during the long-term use of yttrium oxide separation process flows in existing naphthenic acid systems and HAB mixed systems. The grouping and separation methods have the advantages of being advanced and rational and having a short process flow, low production cost, strong adaptability, and easy operation and control, the performance of comprehensive technical and economic indicators being superior to naphthenic acid processes, and having practical application value.

Inventors:
CHEN JI (CN)
DENG YUEFENG (CN)
LI DEQIAN (CN)
LI HAILIAN (CN)
YANG MAOHUA (CN)
LIU YU (CN)
ZOU DAN (CN)
BAI YAN (CN)
CHANG YONGQING (CN)
Application Number:
PCT/CN2019/110337
Publication Date:
October 22, 2020
Filing Date:
October 10, 2019
Export Citation:
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Assignee:
CHANGCHUN INST APPLIED CHEMISTRY CAS (CN)
International Classes:
C22B3/40; C01F17/00
Domestic Patent References:
WO2018048464A12018-03-15
Foreign References:
CN1288069A2001-03-21
CN103466679A2013-12-25
CN1563442A2005-01-12
CN101012501A2007-08-08
CN106498193A2017-03-15
US3715424A1973-02-06
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
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