Leaching of Platinum from Cobalt-Rich Crust by Hydrochloric Acid with Hydrogen Peroxide

WANG Li Pang, SATO Daisuke, DODBIBA Gjergj, SADAKI Jun, FUJITA Toyohisa, HISHITA Hajime

doi:10.4144/rpsj.56.165

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Other Title

塩酸および過酸化水素の添加によるコバルト・リッチ・クラストからの白金の浸出
エンサンオヨビカサンカスイソノテンカニヨルコバルトリッチクラストカラノハッキンノシンシュツ

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Description

Leaching of platinum (Pt) traces from Cobalt-Rich Crust (CRC) in hydrochloric acid (HCl) solution with hydrogen peroxide (H₂O₂) was carried out in this work. Two kinds of CRC samples with different Pt grades were used and the effects of HCl and H₂O₂ concentration, leaching temperature and time as well as solid-liquid ratio were investigated to evaluate the Pt leaching.<br> The results showed that more than 95% of Pt in the CRC sample was leached out in HCl solution which concentration was more than 2 mol/L. The leaching temperature was higher than 50°C and the time was longer than 30 min whereas the solid-liquid ratio was less than 50 g/L. Similar results were observed when using HCl solution of more than 0.5 mol/L with the addition of more than 1 vol.% H₂O₂, while the leaching temperature was kept at 30°C and the time was longer than 15 min but at a reduced solid-liquid ratio (i.e. less than 10 g/L). There was no difference on Pt leached fraction between the two CRC samples with different Pt grades.<br>

Journal

Resources Processing

Resources Processing 56 (4), 165-173, 2009

The Resources Processing Society of Japan

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Details 詳細情報について

CRID: 1390001205206504576

NII Article ID: 130000137821

NII Book ID: AA11907992

DOI: 10.4144/rpsj.56.165

ISSN: 13499262; 13486012

NDL BIB ID: 10496548

Web Site: http://id.ndl.go.jp/bib/10496548; https://ndlsearch.ndl.go.jp/books/R000000004-I10496548

Text Lang: ja

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