To provide a new method for separating and recovering noble metals where, from a material comprising a plurality of noble metals and base metals, each noble metal can be efficiently separated in a pure state by a simple operation using an adsorption/elution agent inexpensively obtainable in large amounts, and easily regenerative after use, and which is suitable for performing on an industrial scale.
Individual noble metals are classified and isolated at high purity from a material comprising a plurality of noble metals and base metals through: a step (a) where the material is dissolved with hydrochloric acid; a step (b) where the hydrochloric acid solution obtained by the step (a) is passed through a cellulose column, so as to adsorb noble metals; a step (c) where, from the cellulose with the noble metals adsorbed, the noble metals belonging to the first group are classified and recovered using a mixture of hydrochloric acid and 2-propanone as a development/elution agent; and a step (d) where the noble metals belonging to the second group are classified and recovered using a mixture of hydrochloric acid and 1-butanol as a development/elution agent.
COPYRIGHT: (C)2006,JPO&NCIPI
Kazuo Shimizu
Tadashi Nozaki
Shigeo Oishi
Asaka Riken Co., Ltd.
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| JP2005002414A |
Yousuke Yamada