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Method for producing vanadium metal

A manufacturing method and metal technology, applied in the field of metal vanadium, can solve the problems of difficulty in increasing the size of the device, difficult treatment of vanadium halide, and failure to achieve practical application, and achieve the effect of low cost

Inactive Publication Date: 2019-09-17
HOKKAIDO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment of vanadium halides is very difficult, and the design of the process for removing the by-products generated during the production process is complicated, so it is difficult to increase the size of the device, and it has not been put into practical use.

Method used

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  • Method for producing vanadium metal
  • Method for producing vanadium metal
  • Method for producing vanadium metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Next, examples will be described.

[0093] In this example, as molten salt (mixed molten salt) 8, 0.5 mol% of calcium sulfide (manufactured by Wako Pure Chemicals, special grade reagent) was added to 600 g of calcium chloride (manufactured by Wako Pure Chemical Industries, special grade reagent) to obtain Put the substance into the crucible 3 (inner diameter is 90mm, depth is 200mm). The crucible 3 was placed in a closed container 4 (inner diameter: 105 mm, depth: 480 mm) and sealed with a flange. After vacuum dehydration treatment, the temperature was raised to 900° C. under an argon atmosphere.

[0094] In addition, the titanium rod 1a and the carbon rod 1b of the anode 1, the titanium rod 2a of the cathode 2, and the container 2b attached so as to surround the titanium rod were prepared. 1.502 g of vanadium sulfide 12 (purity: 99% manufactured by Yachi Chemical Co., Ltd.) was inserted into the container 2b.

[0095] After the temperature of the molten salt in the c...

Embodiment 2

[0098] In this example, 0.5 mol % of calcium sulfide (manufactured by Wako Pure Chemicals, special grade reagent) was added to 600 g of calcium chloride (manufactured by Wako Pure Chemical Industries, special grade reagent) as molten salt 8, and put into a crucible. 3 (with an inner diameter of 90mm and a depth of 200mm). The crucible 3 was placed in an airtight container 4 (inner diameter: 105 mm, depth: 480 mm) and sealed with a flange. After vacuum dehydration treatment, the temperature was raised to 900° C. under an argon atmosphere.

[0099] In addition, the titanium rod 1a and the carbon rod 1b of the anode 1, the titanium rod 2a of the cathode 2, and the container 2b attached so as to surround the titanium rod were prepared. 1.488 g of vanadium trioxide 12 (purity of 99% or more manufactured by Sun Mining Co., Ltd.) was inserted into the container 2b.

[0100] After the temperature is stabilized, the two electrodes 1 and 2 are inserted into the molten salt 8 to start e...

Embodiment 3

[0103] In this example, 4 g of ammonium metavanadate (Wako Pure Chemical Special Grade Reagent) and vanadyl sulfate (Xinxing Chemical) were prepared as raw materials (vanadium compound 12). Then, each of the prepared raw materials was subjected to heat treatment (heating temperature: 600° C., heating time: 10 minutes) as a pretreatment to obtain a processed substance. The obtained material is analyzed, and the result is vanadium pentoxide oxide (V 2 o 5 ).

[0104] Each vanadium pentoxide oxide (V 2 o 5 ), respectively for the manufacture of metal vanadium. At this time, the vanadium oxide (V 2 o 5 ) is in any case 1.500 g. In addition, due to the removal of vanadium oxides (V 2 o 5 ) is the same as that of Example 2, so the description is omitted here.

[0105] Table 1 below shows the analysis results of the sulfur content and the oxygen content (oxygen concentration) of samples produced by molten salt electrolytic reduction in each example (manufactured samples). ...

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Abstract

[Problem] To provide a method by which high-purity metallic vanadium is manufactured inexpensively and energy efficiently. [Solution] Provided is a method for manufacturing metallic vanadium in which a portion of an inorganic molten salt for forming a molten salt electrolytic bath in a reaction vessel is electrolyzed to generate calcium, and a vanadium compound is thermally reduced by the calcium to manufacture metallic vanadium, wherein at least one of the following conditions is met in the method for manufacturing metallic vanadium: the portion of the inorganic molten salt contains one or more compounds selected from the group consisting of sulfides and sulfate compounds of calcium; and the vanadium compound is a mixed vanadium compound containing one or more compounds selected from the group consisting of vanadium sulfide, vanadium sulfate compounds, vanadium thiosulfate compounds, ammonium metavanadate, and vanadyl sulfate.

Description

technical field [0001] The invention relates to a method for producing metal vanadium, especially high-purity metal vanadium. Background technique [0002] Metal vanadium is widely used as coating materials, additives in titanium, aluminum, zirconium and steel, heat-resistant materials such as jets and missiles, sputtering targets, vacuum tube evaporation, alloy superconducting materials, etc., because it does not radiate Its properties are also used as a material for nuclear reactors. [0003] In addition, since metal vanadium has hydrogen intercalation and deintercalation properties of about 2.2 mass% at normal temperature and normal pressure, it is expected to be used as a single metal as a hydrogen intercalation material. For example, it is considered to use a vanadium-based hydrogen intercalation alloy as a cathode of a Ni-hydrogen battery that can be a substitute for a nickel-cadmium battery. [0004] Furthermore, utilization in electrolyte solutions of vanadium redo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B5/04C25C3/02C25C7/06
Inventor 铃木亮辅佐藤完二古川英树
Owner HOKKAIDO UNIVERSITY
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