METHOD FOR RECOVERING CRUDE INDIUM
PROBLEM TO BE SOLVED: To provide a method for efficiently recovering, at an economical cost, crude indium having a purity suitable for electrolytic refining from scraps containing indium zinc oxide (IZO). SOLUTION: This method for recovering crude indium used for electrolytic refining from IZO-conta...
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| creator | MINAMI CHIAKI |
| description | PROBLEM TO BE SOLVED: To provide a method for efficiently recovering, at an economical cost, crude indium having a purity suitable for electrolytic refining from scraps containing indium zinc oxide (IZO). SOLUTION: This method for recovering crude indium used for electrolytic refining from IZO-containing scraps comprises the following steps (1) to (4) and is characterized in that, in a step (3), an aluminum sheet is used as a displacing agent: a step (1) where powdered IZO-containing scraps are leached with hydrochloric acid to prepare a leachate: a step (2) where an aqueous solution of sodium hydroxide is added to the leachate to carry out pH adjustment; a step (3) where a displacing agent is immersed in the leachate after the pH adjustment to deposit spongy indium by displacement; and a step (4) where sodium hydroxide is added to the spongy indium to carry out dissolution and hereby the crude indium is obtained. COPYRIGHT: (C)2008,JPO&INPIT |
| format | Patent |
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SOLUTION: This method for recovering crude indium used for electrolytic refining from IZO-containing scraps comprises the following steps (1) to (4) and is characterized in that, in a step (3), an aluminum sheet is used as a displacing agent: a step (1) where powdered IZO-containing scraps are leached with hydrochloric acid to prepare a leachate: a step (2) where an aqueous solution of sodium hydroxide is added to the leachate to carry out pH adjustment; a step (3) where a displacing agent is immersed in the leachate after the pH adjustment to deposit spongy indium by displacement; and a step (4) where sodium hydroxide is added to the spongy indium to carry out dissolution and hereby the crude indium is obtained. 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SOLUTION: This method for recovering crude indium used for electrolytic refining from IZO-containing scraps comprises the following steps (1) to (4) and is characterized in that, in a step (3), an aluminum sheet is used as a displacing agent: a step (1) where powdered IZO-containing scraps are leached with hydrochloric acid to prepare a leachate: a step (2) where an aqueous solution of sodium hydroxide is added to the leachate to carry out pH adjustment; a step (3) where a displacing agent is immersed in the leachate after the pH adjustment to deposit spongy indium by displacement; and a step (4) where sodium hydroxide is added to the spongy indium to carry out dissolution and hereby the crude indium is obtained. 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SOLUTION: This method for recovering crude indium used for electrolytic refining from IZO-containing scraps comprises the following steps (1) to (4) and is characterized in that, in a step (3), an aluminum sheet is used as a displacing agent: a step (1) where powdered IZO-containing scraps are leached with hydrochloric acid to prepare a leachate: a step (2) where an aqueous solution of sodium hydroxide is added to the leachate to carry out pH adjustment; a step (3) where a displacing agent is immersed in the leachate after the pH adjustment to deposit spongy indium by displacement; and a step (4) where sodium hydroxide is added to the spongy indium to carry out dissolution and hereby the crude indium is obtained. COPYRIGHT: (C)2008,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | METHOD FOR RECOVERING CRUDE INDIUM |
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