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Method for electrolytically preparing magnesium-rare earth by using hydrated magnesium chloride and rare earth chloride

A technology for hydrating magnesium chloride and magnesium rare earth alloys, which is applied in the field of producing magnesium rare earth alloys, can solve the problems of high cost, difficult preparation, and high production cost of magnesium or magnesium alloys, and achieve the effects of reducing production costs and simplifying the process

Inactive Publication Date: 2010-07-14
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

[0004] The traditional magnesium electrolysis method uses anhydrous magnesium chloride as the raw material for electrolysis, but the preparation of anhydrous magnesium chloride is difficult and the production cost is high, which leads to high cost of the produced magnesium or magnesium alloy, and the product lacks market competitiveness

Method used

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  • Method for electrolytically preparing magnesium-rare earth by using hydrated magnesium chloride and rare earth chloride
  • Method for electrolytically preparing magnesium-rare earth by using hydrated magnesium chloride and rare earth chloride
  • Method for electrolytically preparing magnesium-rare earth by using hydrated magnesium chloride and rare earth chloride

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Embodiment 1

[0032] Example 1 A method for electrolytically preparing magnesium rare earth alloys with hydrated magnesium chloride and rare earth chloride, the electrolytic raw material is MgCl 2 2H 2 O and CeCl 3 ·3H 2 O, its mass ratio is 10:1; the electrolyte is MgCl 2 -NaCl-KCl-CeCl 3 system, where MgCl 2 The mass percentage is 20%, the mass percentage of rare earth chloride is 5%, the mass ratio of sodium chloride to potassium chloride is 1:1; the cathode is a molybdenum rod, and the anode is graphite. Under the condition of 680°C, direct current electrolysis is carried out, and Mg-Ce alloy is obtained at the cathode.

[0033] As determined by EDTA titration, the Mg-Ce alloy contained 5.25% (Wt.%) Ce (see Table 1).

[0034] Table 1: Magnesium-cerium alloy content

[0035]

Embodiment 2

[0036] Example 2 A method for electrolytically preparing magnesium rare earth alloys with hydrated magnesium chloride and rare earth chloride, the electrolytic raw material is MgCl 2 2H 2 O and CeCl 3 ·3H 2 O, its mass ratio is 5:1; the electrolyte is MgCl 2 -NaCl-KCl-CeCl 3 system, where MgCl 2 The mass percentage is 10%, the mass percentage of rare earth chloride is 10%, the mass ratio of sodium chloride to potassium chloride is 3:1; the cathode is a molybdenum rod, and the anode is graphite. Under the condition of 800°C, direct current electrolysis is carried out, and Mg-Ce alloy is obtained at the cathode.

[0037] As determined by EDTA titration, the Mg-Ce alloy contained 32% (Wt.%) Ce (see Table 2).

[0038] Table 2: Magnesium-cerium alloy content

[0039]

Embodiment 3

[0040] Example 3 A method for electrolytically preparing magnesium rare earth alloys with hydrated magnesium chloride and rare earth chloride, the electrolytic raw material is MgCl 2 2H 2 O and CeCl 3 ·3H 2 O, its mass ratio is 1:1; the electrolyte is MgCl 2 -NaCl-KCl-CeCl 3 system, where MgCl2 The mass percentage is 15%, the mass percentage of rare earth chloride is 15%, the mass ratio of sodium chloride to potassium chloride is 2:1; the cathode is a molybdenum rod, and the anode is graphite. When the voltage is 8.0V and the temperature Under the condition of 720°C, direct current electrolysis is carried out, and Mg-Ce alloy is obtained at the cathode.

[0041] As determined by EDTA titration, the Mg-Ce alloy contained 58% (Wt.%) Ce (see Table 3).

[0042] Table 3: Magnesium-cerium alloy content

[0043]

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Abstract

The invention relates to a method for electrolytically preparing magnesium-rare earth by using hydrated magnesium chloride and rare earth chloride, which is characterized by taking MgCl2.2H2O and CeCl3.3H2O or MgCl2.2H2O and NdCl3.3H2O as raw materials, taking a system of MgCl2-NaCl-KCl-CeCl3 or a system of MgCl2-NaCl-KCl-NdCl3 as an electrolyte, taking a molybdenum rod as a subsidence cathode and black lead as an anode, carrying out DC electrolyte under the condition with the voltage of 4.0-8.0V and the temperature of 680 -800 DEG C, and obtaining magnesium-rare earth. The invention uses incomplete dehydrated hydrated magnesium chloride and incomplete dehydrated rare earth chloride as the raw materials to carry out the electrolyte, and avoids the process of removing the constituent water of crystal in the traditional method, so that the processes can be simplified, and simultaneously, the cost of the raw materials and production can be reduced.

Description

technical field [0001] The invention relates to a method for producing magnesium rare earth alloy, in particular to a method for electrolytically preparing magnesium rare earth alloy with hydrated magnesium chloride and rare earth chloride. Background technique [0002] Magnesium alloy is the lightest engineering structure material, which has the characteristics of low density, high specific strength and rigidity, good thermal and electrical conductivity, easy forming and processing, and easy recycling of waste materials. The application of aluminum alloy is increasing day by day, and it is known as "21st century green engineering metal structural material". Therefore, its production technology and application research have attracted more and more attention. The unique extranuclear electron arrangement of rare earth elements makes them have unique functions in the field of metallurgy and materials, such as purifying alloys, improving alloy structures, improving the mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36
Inventor 韩继龙火焱孙庆国吴志坚李明珍
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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