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Method for extracting lithium from salt lake by means of centrifugal extractor

A centrifugal extractor and extraction technology, applied in the direction of improving process efficiency, can solve the problems of large dissolution loss of extractant, environmental pollution, equipment corrosion and so on

Inactive Publication Date: 2017-09-01
ZHENGZHOU TIANYI EXTRACTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to address the deficiencies of the prior art, to provide a method for extracting lithium from salt lakes using a centrifugal extractor, and to combine advanced equipment with a unique process to solve

Method used

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  • Method for extracting lithium from salt lake by means of centrifugal extractor
  • Method for extracting lithium from salt lake by means of centrifugal extractor
  • Method for extracting lithium from salt lake by means of centrifugal extractor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A method for extracting lithium from a salt lake using a centrifugal extractor, comprising the following steps:

[0057] (1) Extraction section: add excess FeCl to the salt lake lithium water to be extracted 3 , forming LiFeCl 4 solution; the LiFeCl 4 The solution and the extractant are mixed with a volume ratio of 1:1 and added to a centrifugal extractor for extraction; the temperature is 25°C; 4 stages of countercurrent extraction; the extractant is tributyl phosphate and kerosene, and the volume ratio is, tributyl phosphate / Kerosene = 1:1;

[0058] (2) pickling section: step (1) extraction gained organic phase is carried out pickling in described centrifugal extractor, and pickling agent is the hydrochloric acid of 3mol / l; The volume ratio of organic phase and hydrochloric acid is 3: 1; 25°C; 3-stage countercurrent extraction;

[0059] (3) stripping section: step (2) gained organic phase is carried out stripping in described centrifugal extractor, stripping agen...

Embodiment 2

[0063] A method for extracting lithium from a salt lake using a centrifugal extractor, comprising the following steps:

[0064] (1) Extraction section: add excess FeCl to the salt lake lithium water to be extracted 3 , forming LiFeCl 4 solution; the LiFeCl 4 The solution and the extractant are mixed with a volume ratio of 1:5 and added to a centrifugal extractor for extraction; the temperature is 35°C; 5 stages of countercurrent extraction; the extractant is tributyl phosphate and kerosene, and the volume ratio is, tributyl phosphate Ester / kerosene=1:3;

[0065] (2) pickling section: step (1) extraction gained organic phase is carried out pickling in described centrifugal extractor, and pickling agent is the hydrochloric acid of 3-4mol / l; The volume ratio of described organic phase and hydrochloric acid is 5 : 1; temperature is 35°C; 4-stage countercurrent extraction;

[0066] (3) stripping section: the organic phase obtained in step (2) is stripped in the centrifugal extr...

Embodiment 3

[0069] A method for extracting lithium from a salt lake using a centrifugal extractor, comprising the following steps:

[0070] (1) Extraction section: add excess FeCl to the salt lake lithium water to be extracted 3 , forming LiFeCl 4 solution; the LiFeCl 4 The solution and the extractant are mixed with a volume ratio of 1:3 and added to a centrifugal extractor for extraction; the temperature is 30°C; 4 stages of countercurrent extraction; the extractant is tributyl phosphate and kerosene, and the volume ratio is tributyl phosphate / Kerosene = 1:2;

[0071] (2) pickling section: step (1) extraction gained organic phase is carried out pickling in described centrifugal extractor, and pickling agent is the hydrochloric acid of 3.5mol / l; The volume ratio of described organic phase and hydrochloric acid is 4: 1; The temperature is 30°C; 3-stage countercurrent extraction;

[0072] (3) stripping section: the organic phase obtained in step (2) is stripped in the centrifugal extra...

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Abstract

The invention discloses a method for extracting lithium from a salt lake by means of a centrifugal extractor. The method comprises the steps of an extraction section, an acid pickling section and a reextraction section. According to the method for extracting lithium from the salt lake by means of the centrifugal extractor, after the centrifugal extractor is applied to a salt-lake lithium extraction technology, the equipment corrosion and extraction-agent solution loss problems can be effectively solved, the extraction rate can be increased, and the extraction efficiency can be improved. The market for industrial application of salt-lake lithium extraction is opened, and the method has a good market application prospect.

Description

technical field [0001] The invention relates to the field of lithium extraction from salt lakes, in particular to a method for extracting lithium from salt lakes using a centrifugal extractor. Background technique [0002] Lithium resources in nature mainly occur in granite pegmatite deposits, salt lake brine, sea water and geothermal water. According to statistics, the reserves of lithium resources in salt lake brine account for about 70-80% of the total lithium resources. Therefore, lithium extraction from salt lake brine will become the main development direction of lithium salt production. [0003] Throughout the process of extracting lithium salt from salt lake brine at home and abroad, there are mainly precipitation method, extraction method, ion exchange adsorption method, carbonization method, calcination leaching method, Xu's method and electrodialysis method. Among them, the precipitation method, extraction method, ion exchange adsorption method and carbonization ...

Claims

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Application Information

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IPC IPC(8): C22B26/12C22B3/38C22B3/02
CPCC22B3/02C22B26/12C22B3/3846Y02P10/20
Inventor 王利军
Owner ZHENGZHOU TIANYI EXTRACTION TECH
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