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Recovery of Gallium

A recovery method and technology for gallium hydroxide, which are applied in chemical instruments and methods, gallium/indium/thallium compounds, petroleum industry, etc., can solve the problems of complex gallium alkaline electrolyte procedures, improve recovery rate and improve current efficiency , The effect of reducing the amount of waste liquid

Inactive Publication Date: 2010-04-14
NIPPON LIGHT METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, the steps up to the preparation of the gallium alkaline electrolyte become complicated, and in addition, new problems arise in the recovery or disposal of additives such as jarosite.

Method used

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  • Recovery of Gallium
  • Recovery of Gallium
  • Recovery of Gallium

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Experimental program
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Embodiment 1

[0037] Below, according to figure 1 The embodiment that represents carries out the embodiment 1 of implementation, to the Bayer liquor that is sent into the trapping operation (ST-1), the gallium-containing reverse trapping liquid that is discharged by the reverse trapping process (ST-2) is obtained by The gallium concentrated solution discharged from the electrodialysis process (ST-3), the gallium liquid after iron removal discharged from the iron removal process (ST-4), and the hydrogen oxide discharged from the neutralization tank 19 of the ultrafiltration process (ST-5) Gallium slurry, the concentrated slurry discharged from the ultrafiltration device 21 in the ultrafiltration step (ST-5), and the gallium alkaline electrolyte obtained in the redissolving step (ST-6) were measured for treatment flow, gallium concentration, iron The ion concentration, gallium treated amount and iron treated amount are shown in Table 1.

[0038] In addition, in the electrolysis process (ST-7...

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Abstract

A method of recovering gallium metal from a Bayer liquor which comprises: an electrodialysis step in which a gallium-containing liquid obtained by inverse collection is electrodialyzed to enrich the liquid with gallium and recover an acid; an iron removal step in which iron is removed from the gallium concentrate obtained; an ultrafiltation step in which the resultant iron-free gallium solution isneutralized and the gallium hydroxide slurry generated is subjected to ultrafiltration to concentrate it; a redissolution step in which the concentrated gallium hydroxide slurry is dissolved in an alkali solution; and an electrolysis step in which the alkaline electrolytic solution of gallium obtained by the redissolution is electrolyzed to recover gallium metal.

Description

technical field [0001] The present invention relates to the method for reclaiming gallium from the Bayer liquid (sodium aluminate aqueous solution) that produces from the Bayer process of producing aluminum oxide from bauxite, in more detail, it relates to making the chelating agent composed of water-insoluble substituted hydroxyquinoline contact the Bayer liquid , the chelating agent is used to capture gallium, the reverse capture solution containing substituted hydroxyquinoline is contacted with the obtained gallium capture chelating agent and gallium is extracted into the reverse capture solution, and the gallium-containing reverse capture is obtained Among the gallium recovery methods for liquid recovery of gallium metal, the gallium recovery method for efficiently recovering metal gallium from a gallium-containing reverse trapping liquid with an extremely low gallium concentration. Background technique [0002] In the Bayer process, although a sodium hydroxide solution ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/22C10G15/00C01G15/00
CPCC25C1/22
Inventor 小林恭佐野弘若月章弘
Owner NIPPON LIGHT METAL CO LTD