| 摘要 |
<p>1509525 Precious metal recovery MATTHEY RUSTENBURG REFINERS (PTY) Ltd 19 March 1975 [21 March 1974] 12599/74 Heading C1A Precious metal (Au + Pt group metal) is partially separated from concentrates containing Ag and base metals by (1) treatment with H 2 SO 4 (containing not more than 10 wt. per cent H 2 O) at#100‹ C., and (2) extraction of the base metal + Ag sulphates transformed with water, optionally containing other solutes.</p> |
