Title:
METHOD FOR SELECTIVELY EXTRACTING THORIUM BY USING POLYMER ALCOHOL
Document Type and Number:
WIPO Patent Application WO/2019/221329
Kind Code:
A1
Abstract:
The present invention relates to a method for extracting thorium from a leaching residue of a rare earth ore, and provides a method for selectively extracting thorium by using a polymer alcohol, comprising the steps of: (a) adding an acid solution to the leaching residue, and adding hydrogen peroxide, which is a reducing agent, and a polymer alcohol, thereby forming a leaching solution; and (b) solvent-extracting thorium by adding, to the leaching solution, an organic phase comprising an extractant. Therefore, the load of a thorium extraction process can be reduced by reducing the use amount of the reducing agent.
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/KR2018/006923
Publication Date:
November 21, 2019
Filing Date:
June 19, 2018
Export Citation:
Assignee:
KOREA INST GEOSCIENCE & MINERAL RESOURCES (KR)
International Classes:
C22B60/02; C22B3/08; C22B3/20; C22B3/26
Foreign References:
| KR101727978B1 | 2017-04-19 | |||
| KR101422068B1 | 2014-07-23 | |||
| KR100265432B1 | 2000-09-15 | |||
| KR101382905B1 | 2014-04-10 | |||
| JP2010275179A | 2010-12-09 |
Other References:
KIM, SO-HYUN ET AL.: "Effects of Addictive (Hydrogen Peroxide and Ethylene Glycol) and Temperature on the Leaching of Copper from Chalcopyrite by Sulfuric Acid Solution", THE KOREAN INSTITUTE OF RESOURCES RECYCLING, vol. 25, 2016, pages 36 - 43
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (KR)
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