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.
CN111363919AInactive Publication Date: 2020-07-03ZHENGZHOU TIANYI EXTRACTION TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHENGZHOU TIANYI EXTRACTION TECH
Publication Date
2020-07-03
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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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