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Compound extractant for deep purification of lithium ore leachate and purification process

A compound extraction agent and deep purification technology, which is applied in the field of metal smelting, can solve the problems of low impurity removal efficiency of lithium ore leachate, and achieve good phase separation effect, good extraction effect, and high lithium recovery rate.

Inactive Publication Date: 2020-07-03
ZHENGZHOU TIANYI EXTRACTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object provided by the present invention is to provide a compound extractant for deep purification of lithium ore leachate that can simultaneously remove various impurities such as calcium, magnesium, iron, manganese and aluminum in lithium ore leachate, to solve the problem of lithium ore in the prior art. The problem of low impurity removal efficiency of leachate

Method used

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  • Compound extractant for deep purification of lithium ore leachate and purification process
  • Compound extractant for deep purification of lithium ore leachate and purification process
  • Compound extractant for deep purification of lithium ore leachate and purification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] After testing, the impurity content in sample 1 is as follows:

[0036] Calcium: 0.427g / L, Magnesium: 0.356g / L, Iron: 0.25g / L, Manganese: 0.151g / L, Aluminum: 0.102g / L, Lithium: 9g / L, pH 5.5;

[0037] 1.1 Preparation of compound extractant:

[0038] Compound extractant 1: the volume fraction of AD290 is 10%, and the balance is kerosene;

[0039] Compound extractant 2: AD290 volume fraction is 10%, tertiary carbon carboxylic acid Versatic911 volume fraction is 15%, and the balance is kerosene;

[0040] Compound extractant 3: AD290 volume fraction is 10%, tertiary carbon carboxylic acid Versatic911 volume fraction is 15%, and the balance is white oil;

[0041] 1.2 Wash the compound extractants 1, 2, and 3 with lye:

[0042] Prepare a NaOH solution with a mass fraction of 10%, the volume ratio of the compound extractant to NaOH solution is 10:1, the number of washing stages is 3, and the compound extractant after alkali washing is separated after washing.

[0043] 1.3 P...

Embodiment 2

[0050] After testing, the impurity content in sample 2 is as follows:

[0051] Calcium: 0.2g / L, Magnesium: 0.2g / L, Iron: 0.2g / L, Manganese: 0.1g / L, Aluminum: 0.1g / L, Lithium: 10.3g / L, pH 6;

[0052] 2.1 Preparation of compound extractant:

[0053] Compound extractant 1: the volume fraction of AD290 is 5%, and the balance is sulfonated kerosene;

[0054] Compound extractant 2: the volume fraction of AD290 is 5%, the volume fraction of tertiary carbon carboxylic acid Versatic911 is 20%, and the balance is sulfonated kerosene;

[0055] Compound extractant 3: the volume fraction of AD290 is 5%, the volume fraction of tertiary carbon carboxylic acid Versatic911 is 20%, and the balance is white oil;

[0056] 2.2 Wash the compound extractants 1, 2, and 3 with lye:

[0057] Prepare a NaOH solution with a mass fraction of 15%, the volume ratio of the compound extractant to NaOH solution is 12:1, the number of washing stages is 2, and the compound extractant after alkali washing is s...

Embodiment 3

[0065] After testing, the impurity content in sample 3 is as follows:

[0066] Calcium: 0.8g / L, Magnesium: 1.0g / L, Iron: 0.9g / L, Manganese: 1.0g / L, Aluminum: 0.9g / L, Lithium: 11.6g / L, pH 6.5;

[0067] 3.1 Preparation of compound extractant:

[0068] Compound extractant 1: the volume fraction of AD290 is 15%, and the balance is sulfonated kerosene;

[0069] Compound extractant 2: the volume fraction of AD290 is 15%, the volume fraction of tertiary carbon carboxylic acid Versatic911 is 20%, and the balance is sulfonated kerosene;

[0070] Compound extractant 3: AD290 volume fraction is 15%, tertiary carbon carboxylic acid Versatic911 volume fraction is 20%, and the balance is white oil;

[0071] 3.2 Wash the compound extractants 1, 2, and 3 with lye:

[0072] Prepare a NaOH solution with a mass fraction of 20%, the volume ratio of the compound extractant to NaOH solution is 20:1, and the number of washing stages is 1, and the compound extractant after alkali washing is separa...

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Abstract

The invention belongs to the technical field of metal smelting, and particularly relates to a compound extractant for deep purification of lithium ore leachate and a purification process. The raw material of the compound extractant for deep purification of the lithium ore leachate comprises an acidic phosphorus extractant AD290, and the volume fraction of the acidic phosphorus extractant AD290 is5%-20%. The compound extractant for deep purification of the lithium ore leachate can remove impurities such as iron, manganese, aluminum, calcium and magnesium at the same time, so that the content of the impurities in the purified lithium ore leachate is reduced to 1 ppm or below, and the compound extractant can be directly used for preparing battery-grade lithium carbonate.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a compound extraction agent for deep purification of lithium ore leachate and a purification process. Background technique [0002] Lithium is an important source for making lithium batteries and can be smelted from lithium ore. Common methods include limestone roasting, sulfuric acid, kraft, chlorination roasting, and pressure cooking. Lithium ore leaching solution is a common intermediate product for smelting lithium from lithium ore. Lithium ore leaching solution contains lithium sulfate. Lithium sulfate can be obtained through processes such as impurity removal, concentration, lithium precipitation, and washing. Battery-grade lithium carbonate is an important inorganic chemical product, mainly used as a lithium source for the preparation of lithium-ion battery cathode materials. With the rapid development of the electronics and electric vehicle industries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/40C22B26/12
CPCC22B26/12C22B3/409Y02P10/20
Inventor 高艳芳李瑞琛杨鹏飞张书锋王利军
Owner ZHENGZHOU TIANYI EXTRACTION TECH
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