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Title:
EXTRACTION SOLVENT AND METHOD THEREOF FOR EXTRACTING AND SEPARATING LITHIUM ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/114817
Kind Code:
A1
Abstract:
Provided is an extraction solvent for extracting and separating lithium element and a method for extracting and separating the lithium element, which belongs to the technical field of wet metal metallurgy. An acid extractant or a mixture of an acid extractant and a neutral phosphorus extractant is used as an extractant, and after saponification of the extractant, the lithium element in the solution containing lithium are extracted and separated to obtain the solution containing lithium element. According to the extraction solvent for extracting and separating lithium element and the method for extracting and separating the lithium element, it achieves that ferric chloride is not adopted as a synergistic agent, it has wide applicability and is easy to obtain extractant, with low investment, low cost, convenient use, safety and reliability, and the industrial production can be easily realized. Meanwhile, the lithium element can be recovered from production wastewater such as lithium carbonate, and the lithium element can be extracted from high impurity and complex raw materials such as brines with high magnesium-lithium rate. The extraction solvent is especially suitable for extracting lithium element from China's brine, which is conducive to improving the current situation of low lithium resources, difficult separation, heavy pollution and high cost in lithium extracting in China.

Inventors:
LIU MINGBIAO (CN)
HAN DAOJUN (CN)
XIE NAN (CN)
Application Number:
CN2018/121096
Publication Date:
June 20, 2019
Filing Date:
December 14, 2018
Export Citation:
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Assignee:
QIANDONG RARE EARTH GROUP CO LTD (CN)
International Classes:
C22B26/12
Foreign References:
CN107502741A2017-12-22
CN106435180A2017-02-22
CN106636673A2017-05-10
CN103526022A2014-01-22
CN102275956A2011-12-14
US3537813A1970-11-03
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD (CN)
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