Method for extracting lithium chloride from high lithium salt lake brine

A technology of salt lake brine and lithium chloride, applied in lithium halide and other directions, can solve the problems of large consumption of chemicals and low production efficiency, and achieve the effects of uniform particle size, less agglomeration and reducing industrial pollution.

Inactive Publication Date: 2015-12-16
韦海棉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that, aiming at defects such as large consumption of medicaments and low production efficiency in the preparation process of lithium chloride in the prior art, the present invention provides a method for extracting lithium chloride from high-lithium salt lake brine, through a A kind of method for extracting lithium chloride after adding inorganic salt to impurity removal in salt lake brine

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for extracting lithium chloride from high-lithium salt lake brine, comprising the following steps:

[0027] S1. Add high-lithium salt lake brine into the reaction vessel, then add an excess of 10% carbonate solution to remove calcium and magnesium ions, heat to 80-90°C, keep it warm for 0.5 hours, and remove calcium carbonate and magnesium carbonate by suction filtration;

[0028] S2. Adding an excess of 5% barium salt to the product of S1 to remove sulfate radicals, heating to 60-70° C., keeping the temperature for 0.2 hours, and removing barium sulfate by suction filtration;

[0029] S3, add inorganic acid to the product of S2 to remove boron, adjust the pH value to 0.5-1, keep the reaction temperature at 25-30°C, and remove boric acid by suction filtration;

[0030] S4, adding a strong base to the product of S3 to adjust the pH value of the solution to 2-3;

[0031] S5, adding a chelating agent to the S4 product to remove trace amounts of calcium and magnes...

Embodiment 2

[0044] A method for extracting lithium chloride from high-lithium salt lake brine, comprising the following steps:

[0045] S1. Add high-lithium salt lake brine into the reaction vessel, then add excess 10% carbonate to remove calcium and magnesium ions, heat to 80-90°C, keep warm for 0.2 hours, and remove calcium carbonate and magnesium carbonate by suction filtration;

[0046] S2. Adding an excess of 5% barium salt to the product of S1 to remove sulfate radicals, heating to 60-70° C., keeping the temperature for 0.5 hours, and removing barium sulfate by suction filtration;

[0047] S3, add inorganic acid to the product of S2 to remove boron, adjust the pH value to 1-2, keep the reaction temperature at 25-30°C, and remove boric acid by suction filtration;

[0048] S4, adding a strong base to the product of S3 to adjust the pH value of the solution to 2-3;

[0049] S5, adding a chelating agent to the S4 product to remove trace amounts of calcium and magnesium ions, and evapor...

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PUM

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Abstract

The invention relates to the chemical engineering field of inorganic salt and discloses a method for extracting lithium chloride from high lithium salt lake brine. The method disclosed by the invention comprises: adding inorganic salt into salt lake brine to remove calcium and magnesium ions and boron ions; adding a chelating agent to remove trace calcium and magnesium ions; and carrying out spray-drying treatment to obtain lithium chloride solid grains. By adopting inorganic acid and alkali to remove impurities, the production cost is lowered and the industrial pollution is reduced; the lithium chloride product obtained by spray-drying treatment is uniform in grain size, less in agglomeration and high in purity.

Description

technical field [0001] The invention relates to the field of inorganic salt chemical industry, in particular to a method for extracting lithium chloride from high-lithium salt lake brine. Background technique [0002] Lithium chloride is mainly used in air conditioner dehumidifiers, insecticides, lithium battery electrolytes, synthetic fibers, etc., and is also the main raw material for the preparation of lithium metal, lithium carbonate, lithium hydroxide and lithium sulfate. At present, lithium metal has not only become a strategic material of great significance in national defense, but also an important metal closely related to human daily life. In recent years, lithium chloride has also been widely used in the fields of biology and medicine. It is used in the treatment of diabetes and genetic research in medicine; as a mutagen, it is used in food, medicine, environmental protection and other industries to breed high-quality strains. Cultivate high-yield strains, synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/04
Inventor 韦海棉
Owner 韦海棉
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