Title:
METHOD FOR SELECTIVELY STRIPPING THORIUM USING SALT
Document Type and Number:
WIPO Patent Application WO/2019/221323
Kind Code:
A1
Abstract:
The present invention relates to a method for forming an extract from rare earth mineral leach residue and stripping thorium, the method for selectively stripping thorium using a salt comprising the steps of: (a) forming a leachate by adding an acidic solution and adding a reducing agent to leach residue; (b) solvent-extracting thorium by adding, to the leachate, an oil phase comprising an extractant; and (c) stripping the thorium by adding hydrochloric acid and a salt to the thorium-extracted oil phase. Thus, compared to when thorium is stripped using hydrochloric acid, the efficiency of the stripping process may be increased by reducing the amount of hydrochloric acid that is used, and a harmful effect on the environment may be prevented.
Inventors:
CHUNG KYEONG-WOO (KR)
KUMAR RAJESH (KR)
KIM CHUL-JOO (KR)
YOON HO-SUNG (KR)
KUMAR RAJESH (KR)
KIM CHUL-JOO (KR)
YOON HO-SUNG (KR)
Application Number:
PCT/KR2018/006149
Publication Date:
November 21, 2019
Filing Date:
May 30, 2018
Export Citation:
Assignee:
KOREA INST GEOSCIENCE & MINERAL RESOURCES (KR)
International Classes:
C22B60/02; C22B3/08; C22B3/20; C22B3/28
Foreign References:
| KR101727978B1 | 2017-04-19 | |||
| KR101422068B1 | 2014-07-23 | |||
| KR100265432B1 | 2000-09-15 | |||
| KR101382905B1 | 2014-04-10 | |||
| JP2010275179A | 2010-12-09 |
Attorney, Agent or Firm:
DEA-A INTELLECTUAL PROPERTY CONSULTING (KR)
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