A recovery method of the precious metals from chloride acidity Sn content precious metal catalyst recovering liquid

Japanese Patent JP6247088

B2

PROBLEM TO BE SOLVED: To provide a simple recovery method of a noble metal capable of efficiently recovering a noble metal from an aqueous solution containing a Sn-containing hydrochloric acid acidic recovery liquid of a noble metal catalyst.SOLUTION: A noble metal is recovered from a Sn-containing hydrochloric acid acidic recovery liquid of a noble metal catalyst by activated carbon adsorption. The recovery method of a noble metal includes an addition step for preparing an after-addition-solution obtained by adding an organic compound having a carboxy group in the molecule to an aqueous solution containing the recovery liquid, a step for passing the after-addition-solution through an activated carbon layer containing activated carbon that has an absolute value of 0-25 mV of a difference between a zeta potential in an aqueous solution of 10 mmol/L sodium tetraborate and a zeta potential in an aqueous solution of 0.01 mmol/L sodium tetraborate and has a pore volume of pores having a radius of 1 nm or less of 45-500 mm/g, and a step for separating the activated carbon layer from the after-addition-solution having passed through the activated carbon.

Kei Sabae
Yusuke Kaneko
Tetsuya Hanamoto

JP2013263695A

December 13, 2017

December 20, 2013

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Tanaka Kikinzoku Kogyo Co., Ltd.
KURARAY CO.,LTD.

C22B11/00; C02F1/28; C22B3/24

JP2001131646A
JP2002326821A

WO2013191269A1

Etsushi Kotani
Masataka Otani
Masashi Haruji

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