Method of extracting lithium carbonate from salt lake saline with high Mg/Li ratio

A high-magnesium-lithium ratio and lithium carbonate technology, applied in the direction of lithium carbonate;/acid carbonate, etc., can solve the problems of high product cost, no industrialized production, and poor operability, so as to improve utilization rate, Strong operability and favorable environmental effects

Inactive Publication Date: 2003-02-26
陆增 +2
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Many people have conducted various researches on this topic, but none of them has formed industriali

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  • Method of extracting lithium carbonate from salt lake saline with high Mg/Li ratio
  • Method of extracting lithium carbonate from salt lake saline with high Mg/Li ratio

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Embodiment Construction

[0022] The present invention aims at the salt lake brine with high magnesium-lithium ratio, especially Qinghai-liping salt lake intercrystalline brine (Mg / Li is about 60), fully considers the use of the natural environment and climatic conditions in the lake area, and develops a process that is suitable for local conditions and has a technological process The method has strong operability, comprehensively utilizes salt lake resources, is economical and reasonable, and is applicable to the method for extracting lithium carbonate in industrialized production.

[0023] The technological process that the present invention proposes mainly solves the following technical key points:

[0024] Use solar evaporation ponds to naturally evaporate and concentrate intercrystalline brine in salt lakes, and separate crystallization in stages to produce table salt, potassium, magnesium salts and other products, and comprehensively utilize salt lake resources to improve economic benefits;

[00...

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Abstract

A process for extracting lithium carbonate from salt lake saline with high Mg/Li ratio includes natural evaporation to concentrate in a sunshine evaporating pond, sectional crystalization while adding precipitator to make magnesium ion to form insoluble salt, solid-liquid separation, elimianting magnesium from liquid phase, regulation of pH value and evaporation to separate NaCl and obtain LiCl solution of over 100 g/l concentration, deposition of lithium carbonate by using sodium carbonate as precipitator, and separation and drying to obtain lithium carbonate product. The said technological process is suitable for industrial use.

Description

[0001] Field [0002] The invention belongs to a method for extracting lithium carbonate from salt lake water, in particular to a method for extracting lithium carbonate from salt lake water with a high magnesium-lithium ratio. Background technique [0003] The current raw materials for producing lithium and lithium salts in the world are divided into solid ore and liquid ore, among which the share of lithium salt extracted from raw materials such as salt lake brine is increasing year by year. There are many methods for extracting lithium salt from brine, mainly including precipitation method, solvent extraction method, ion exchange (adsorption) method, etc., but large-scale industrial applications are only suitable for salt lake brine with low magnesium-lithium ratio (Mg / Li), For example, the United States uses Sears Salt Lake brine to produce sodium lithium phosphate, Silver Peak underground brine (Mg / Li=1.5:1) to produce lithium carbonate, and Chilean Lake Atacama brine (Mg...

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Application Information

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IPC IPC(8): C01D15/08
Inventor 陆增胡士文袁建军
Owner 陆增
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