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Method for preparing magnesium metal through electrolysis by using novel magnesium deep eutectic solvent

A technology of deep eutectic solvent and metal magnesium, which is applied in the improvement of process efficiency, photography process, instruments, etc., to achieve the effect of strong resistance to water influence, good deposition effect and simple system

Inactive Publication Date: 2013-06-26
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many kinds of ammonia dehydration processes. Due to the limitations of the methods, none of them have been applied in industrial production so far.

Method used

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  • Method for preparing magnesium metal through electrolysis by using novel magnesium deep eutectic solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 A method for preparing metallic magnesium by electrolysis of a novel magnesium eutectic solvent. The temperature of the eutectic solvent is raised to 20°C. At this temperature, 0.3% of the mass of the solvent is added with additives, and a uniform and stable solution is obtained by stirring; the solution Deposit for 0.5 h under the condition that the working electrode is a copper sheet electrode and the constant potential is -2.4V, and then metal magnesium or magnesium alloy is obtained.

[0019] Among them: the deep eutectic solvent refers to adding choline chloride to N,N-dimethylformamide solution at 20°C and stirring continuously until it is completely dissolved to obtain a mixed solution; then magnesium chloride hexahydrate and other metals Chloride is added to the mixed solution at 20°C and stirred continuously until it is completely dissolved; the addition of choline chloride is 10% of the mass of N,N-dimethylformamide solution; the addition of magn...

Embodiment 2

[0021] Example 2 A method for preparing metal magnesium by electrolysis of a novel magnesium eutectic solvent, heating the eutectic solvent to 70°C, adding additives at 1.5% of the mass of the solvent at this temperature, and stirring to obtain a uniform and stable solution; the solution Deposit for 3.5 h under the condition that the working electrode is an aluminum sheet electrode and the constant potential is -2.9V, and then metal magnesium or magnesium alloy is obtained.

[0022] Among them: the deep eutectic solvent refers to adding choline chloride to the N, N-dimethylformamide solution at 70 °C, stirring continuously until all of it is dissolved to obtain a mixed solution; then adding magnesium chloride hexahydrate and other metals Chloride is added to the mixed solution at 70°C, and it is stirred continuously until it is completely dissolved; the addition amount of choline chloride is 80% of the quality of N, N-dimethylformamide solution; the addition amount of mag...

Embodiment 3

[0024] Example 3 A method for preparing metallic magnesium by electrolysis of a novel magnesium eutectic solvent. The eutectic solvent is heated to 50° C., and at this temperature, additives are added according to 0.8% of the mass of the solvent, and a uniform and stable solution is obtained by stirring; the solution Deposit for 2.5 h under the condition that the working electrode is a silver plate electrode and the constant potential is -2.5V, and then metal magnesium or magnesium alloy is obtained.

[0025] Among them: the deep eutectic solvent refers to adding choline chloride to N,N-dimethylformamide solution at 50°C and stirring continuously until it is completely dissolved to obtain a mixed solution; then magnesium chloride hexahydrate and other metals Chloride is added to the mixed solution at 50°C and stirred continuously until it is completely dissolved; the addition of choline chloride is 20% of the quality of the N,N-dimethylformamide solution; the addition of ...

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Abstract

The invention relates to a method for preparing magnesium metal through electrolysis by using a novel magnesium deep eutectic solvent. The method comprises the following steps of: heating the deep eutectic solvent to 20-70DEG C, adding an additive of which the mass is 0.3-1.5% of that of the solvent at the temperature, and stirring to obtain a uniform and stable solution; and depositing the solution for 0.5-3.5 hours under the condition that the working electrode is any one of copper, aluminum, silver and nickel sheet electrodes and the constant potential is between -2.4 and -2.9V to obtain magnesium metal or a magnesium alloy. According to the method, an adopted electrodeposition system is simple, good in deposition effect and easy to implement.

Description

technical field [0001] The invention relates to a method for preparing metallic magnesium, in particular to a method for electrolytically preparing metallic magnesium by using a novel magnesium deep eutectic solvent. Background technique [0002] The production of metal magnesium by electrolysis is the development trend of the magnesium industry. The electrolysis method is to produce metal magnesium by electrolysis of high-temperature molten anhydrous magnesium chloride. The electrolysis process is a mature technology. Its key lies in obtaining high-quality and cheap anhydrous magnesium chloride. And the content of magnesium oxide must be strictly controlled within 0.5%, which has become the bottleneck problem of conventional electrolytic magnesium smelting. After magnesium chloride hexahydrate is dehydrated to magnesium chloride dihydrate in the air, magnesium oxide, hydrochloric acid and hydrolyzate will be produced if the dehydration continues. Magnesium oxide is not con...

Claims

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Application Information

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IPC IPC(8): C25C1/02
CPCY02P10/20
Inventor 贾永忠景燕王怀有岳都元孙进贺马军姚颖
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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