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Novel eutectic solvent for magnesium

A deep eutectic solvent and a new type of technology, applied in the field of new magnesium eutectic solvents, to achieve the effects of stable chemical properties at room temperature, stable electrochemical properties, and strong resistance to water effects

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

AI Technical Summary

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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  • Novel eutectic solvent for magnesium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 A new type of magnesium deep eutectic solvent, the deep eutectic solvent refers to adding 4.786g choline chloride (ChCl) to 47.855g N,N-dimethylformamide (DMF) solution at 20°C, continuously Stir until the mixed solution is obtained after all dissolve; then 10.528g magnesium chloride hydrate (MgCl 2 ·nH 2 O) Add it to 52.641g of the mixed solution at 20°C, and keep stirring until it is completely dissolved; the amount of choline chloride (ChCl) added is 10% of the mass of N,N-dimethylformamide (DMF) solution %; Magnesium chloride hydrate (MgCl 2 ·6H 2 O) The amount added is 20% of the mass of the mixed solution.

[0016] The deep eutectic solvent is a homogeneous, stable, colorless and transparent liquid at room temperature. The viscosity at room temperature is 44.50mp·s, and the conductivity is 2.20ms / cm. The electrochemical test shows that the system has good electrochemical stability, and the electrochemical stability window is 3.54V. The solvent...

Embodiment 2

[0017] Example 2 A new type of magnesium deep eutectic solvent, the deep eutectic solvent refers to adding 38.113g of choline chloride (ChCl) to 47.641g of N,N-dimethylformamide (DMF) solution at 70°C, continuously Stir until the mixed solution is obtained after all dissolve; then 15.201g of magnesium chloride hydrate (MgCl 2 ·6H 2 O) and 10.000g of other metal chlorides were added to 85.754g of the mixed solution at 70°C and stirred continuously until all of them were dissolved; the amount of choline chloride (ChCl) added was N,N-dimethylformamide (DMF) 80% of the mass of the solution; hydrated magnesium chloride (MgCl 2 2H 2 O) The amount added is 18% of the mass of the mixed solution; the amount of other metal chlorides added is 12% of the mass of the mixed solution.

[0018] Wherein: other metal chlorides are zinc chloride.

[0019] The deep eutectic solvent is a homogeneous, stable, colorless and transparent liquid at room temperature. The viscosity at room tem...

Embodiment 3

[0020] Example 3 A new type of magnesium deep eutectic solvent, the deep eutectic solvent refers to adding 31.761g of choline chloride (ChCl) to 47.641g of N,N-dimethylformamide (DMF) solution at 50°C, continuously Stir until all dissolved to obtain a mixed solution; then 15.000g of magnesium chloride hydrate (MgCl 2 ·nH 2 O) and other metal chlorides are added to the mixed solution at 50°C and stirred continuously until they are completely dissolved; the amount of choline chloride (ChCl) added is N,N-dimethylformamide (DMF) solution 67% of mass; magnesium chloride hydrate (MgCl 2 4H 2 O) The amount added is 19% of the mass of the mixed solution; the amount of other metal chlorides added is 31% of the mass of the mixed solution.

[0021] Wherein: other metal chlorides are mixed with 10.000g of zinc chloride and 15.000g of copper chloride.

[0022] The deep eutectic solvent is a homogeneous, stable liquid at room temperature. The viscosity at room temperature is 90.0...

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Abstract

The invention relates to a novel eutectic solvent for magnesium. The eutectic solvent is prepared through the following steps of: adding choline chloride into an N,N-dimethylformamide solution at the temperature of 20-70 DEG C, and continuously stirring the mixture until the choline chloride is completely dissolved to obtain a mixed solution; and then, adding hydrated magnesium chloride and other metal chlorides into the mixed solution at the temperature of 20-70 DEG C, and continuously stirring the mixture until the hydrated magnesium chloride and other metal chlorides are completely dissolved to obtain the novel eutectic solvent, wherein the addition of the choline chloride is 10-80% of the mass of the N,N-dimethylformamide solution, the addition of the hydrated magnesium chloride is 10-70% of the mass of the mixed solution, and the addition of the other metal chlorides is 5-50% of the mass of the mixed solution. The novel eutectic solvent has the characteristics of stable chemical property at room temperature, stable electrochemical property and strong water affect resistance.

Description

technical field [0001] The invention relates to an electrolytic solvent, in particular to a novel magnesium deep eutectic solvent. Background technique [0002] The biggest use of magnesium salt is to refine it into metallic magnesium and magnesium alloys. At present, magnesite is mostly used as raw material in China and the Pidgeon method is used to smelt magnesium. This is a typical high-energy-consuming process and product, and it faces difficulties in energy, resources and the environment. 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 ...

Claims

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Application Information

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IPC IPC(8): C25C3/04
Inventor 贾永忠景燕王怀有岳都元姚颖马军孙进贺
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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