著者

芝田 隼次 奥田 晃彦

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.118, no.1, pp.1-8, 2002 (Released:2006-01-31)

参考文献数

78

被引用文献数

67 80

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The separation and purification methods of precious metals from the scrap containing precious metals are introduced in this review. The solid waste containing precious metals first is dissolved by the solution comprising oxidation agents and ligands, such as aqua regia, Cl2 + HCl and NaCN + O2. The separation of precious metals in the leached solution or wasted solution is carried out by using various methods like classic precipitation, cementation, ion exchange resin, activated carbon adsorption and solvent extraction. It depends on the concentration and combination of precious metals what kind of separation method is applied. Generally, adsorption and ion exchange methods are applicable to the dilute solution, while precipitation, cementation and solvent extraction are used for the concentrated solution. In the recovery of the precious metals in automobile catalyst, the collection of the platinum group metals in Cu or Fe metal melted by a plasma melting method is performed as one of the recovery techniques by the pyro-metallurgy.The fundamental of separation and purification methods, and some commercial plant examples are described for recycling of precious metals.

著者

芝田 隼次 古屋仲 茂樹 村山 憲弘 伊与木 茂樹

雑誌

福島原子力発電所から排出される放射性物質を含む汚染水の処理技術の開発

巻号頁・発行日

2012-03

著者

芝田 隼次 奥田 晃彦

出版者

資源・素材学会

雑誌

資源と素材 : 資源・素材学会誌 (ISSN:09161740)

巻号頁・発行日

vol.118, no.1, pp.1-8, 2002

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The separation and purification methods of precious metals from the scrap containing precious metals are introduced in this review. The solid waste containing precious metals first is dissolved by the solution somprising oxidation agents and ligands, such as aqua regia, Cl2+HCL and NaCN+O2. The separation of precious metals in the leached solution or wasted solution is carried out by using various methods like classic precipitation, cementation, ion exchange resin, activated carbon adsorption and solvent extraction. It depends on the concentration and combination of precious metals what kind of separation method is applied. Generally, adsorption and ion exchange methods are applicable to the dilute solution, while precipitation, cementation and solvent extraction are used for the concentrated solution. In the recovery of the precious metals in automoble catalyst, the collection of the platinum group matels in Cu or Fe metals melted by a plasma melting method is performed as one of the recovery techniques by the pyro-metallurgy. The fundamental of separation and purification methods, and some commercial plant examples are described for recycling of precious metals.

著者

芝田 隼次

出版者

The Surface Finishing Society of Japan

雑誌

表面技術 (ISSN:09151869)

巻号頁・発行日

vol.53, no.10, pp.641-646, 2002-10-01 (Released:2009-10-30)

参考文献数

3

被引用文献数

4 7

著者

村山 憲弘 前川 育央 後 裕之 芝田 隼次 宇田川 悦郎

出版者

公益社団法人 化学工学会

雑誌

化学工学論文集 (ISSN:0386216X)

巻号頁・発行日

vol.38, no.3, pp.176-182, 2012-05-20 (Released:2012-05-20)

参考文献数

22

被引用文献数

5 5

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製鉄所から排出される製鋼スラグを原料に用いて,陰イオン交換体の一つである層状複水酸化物(Layered Double Hydroxide, LDH)の合成を行った.LDHの金属イオン源となる成分をスラグから溶解するために,スラグの塩酸浸出を行った.スラグ浸出液からさまざまなpHで共沈法により合成した生成物に対して,結晶構造,熱重量変化などの物性や化学組成を調べた.水溶液中に存在するAs(III),B,Cr(VI)およびSe(IV)に対する生成物の除去能を検討した.2.0 mol/dm3 HClを用いて2.5 g/100 cm3の固液比にてスラグを浸出するのが適当であった.スラグの塩酸浸出液から得られる生成物はMg–Al系LDHとCa–Al系LDHを含み,pH 11以下ではMg–Al系LDHが,pH 12以上ではMg–Al系LDHとCa–Al系LDHの混合物がそれぞれ生成した.合成pHの調整によって反応液中のMgとCaの沈殿率を制御することが,浸出液から合成されるLDHの種類を決めるための重要な因子である.LDHによる有害陰イオン種の除去率は,Cr(VI)>Se(IV)>As(III)>Bの順に大きく,Feを多く含むスラグ由来の生成物はAs(III)に対する除去能が向上した.合成pHの違いによってスラグ由来生成物の陰イオン除去能は顕著に変化し,pH 10.5で合成した生成物の陰イオン除去能が最も高かった.スラグから陰イオン除去能をもつ層状複水酸化物が得られることがわかった.

著者

大村 友希 河合 秀将 村山 憲弘 芝田 隼次

出版者

公益社団法人 日本金属学会

雑誌

日本金属学会誌 (ISSN:00214876)

巻号頁・発行日

vol.74, no.10, pp.677-681, 2010 (Released:2010-10-01)

参考文献数

16

被引用文献数

1 4

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Analysis of the chemical composition of spent cylindrical Li-ion batteries for PC, and investigation of the separation of each metal (Li, Co, Ni, Cu) from the Li-ion batteries were carried out by burning under a vacuum, crushing and screening, in order to recover rare metals from the Li-ion batteries.    The cylindrical Li-ion batteries have the structure that the multi-layered electrodes with four−layered foils composed of anode, cathode and two separators are enrolled cylindrically around the core steel bar. Seven kinds of metal such as Li, Co, Ni, Fe, Mn, Al and Cu mainly exist in the Li-ion battery. The whole mass of Li-ion battery used in this study is 39.7 g. The mass of Li, Co, Ni and Cu is 1.38 g, 10.3 g, 0.236 g and 4.62 g, respectively, in one piece of Li-ion battery, while other elements (graphite) are 23.16 g. Three size fractions of 150-125, 125-106 and 106-90 μm obtained by crushing and screening after burning under a vacuum and removing stainless case show almost similar compositions. On the other hand, the size fraction of +425 μm contains a lot of foil-like materials. The separation of Al and Cu with a larger particle size from the crushed product of a burned Li-ion battery is accomplished by using a 425 μm sieve. It is important to separate the foil-like elements such as Al, Cu and Fe from the crushed products of electrode materials by using a sieve with a larger mesh size, for example 5-10 mm.

著者

芝田 隼次 SHIBATA Jyunji 奥田 晃彦 OKUDA Akihiro

出版者

資源・素材学会

巻号頁・発行日

2002

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The separation and purification methods of precious metals from the scrap containing precious metals are introduced in this review. The solid waste containing precious metals first is dissolved by the solution somprising oxidation agents and ligands, such as aqua regia, Cl2+HCL and NaCN+O2. The separation of precious metals in the leached solution or wasted solution is carried out by using various methods like classic precipitation, cementation, ion exchange resin, activated carbon adsorption and solvent extraction. It depends on the concentration and combination of precious metals what kind of separation method is applied. Generally, adsorption and ion exchange methods are applicable to the dilute solution, while precipitation, cementation and solvent extraction are used for the concentrated solution. In the recovery of the precious metals in automoble catalyst, the collection of the platinum group matels in Cu or Fe metals melted by a plasma melting method is performed as one of the recovery techniques by the pyro-metallurgy. The fundamental of separation and purification methods, and some commercial plant examples are described for recycling of precious metals.