发明名称 InGa廃材からガリウムを回収する方法
摘要 PROBLEM TO BE SOLVED: To provide a processing method of efficiently recovering gallium at low cost with the minimum amount of alkali hydroxide in an alkali fusion method for recovering gallium from an InGaZn waste material.SOLUTION: A method of recovering gallium includes pulverizing an InGaZn waste material into 5 mm square or less, adding and mixing alkali hydroxide of 1 to 2.5 times mol equivalent of 2 times total amount of gallium molar quantity and zinc molar quantity contained in the InGaZn waste material and then heating it to 250°C or more to obtain slurry, further adding water to exudate gallium and zinc, filtering to separate and collect gallium zinc-containing solution from indium-containing residue, adding an acid to the gallium zinc-containing solution to adjust pH to 12 to 13 for making zinc and indium in the solution to be a hydroxide precipitate and separating solid and liquid, then adding a sulfurizing agent to the solution to precipitate zinc in the solution as sulfide, applying solid liquid separation to recover the high purity gallium solution.
申请公布号 JP6017877(B2) 申请公布日期 2016.11.02
申请号 JP20120168948 申请日期 2012.07.30
申请人 三菱マテリアル株式会社;マテリアルエコリファイン株式会社 发明人 安田 紀彦;岡田 智;宮川 昌樹;鴨下 時男
分类号 C22B58/00;C22B3/12;C22B3/44;C22B3/46;C22B7/00;C22B19/32;C25C1/22 主分类号 C22B58/00
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