| 摘要 |
<p>precious metal technology. SUBSTANCE: method consisting granulation of alloy, leaching of granules with aqua-regia, separation of silver chloride cake, and precipitation of gold is distinguished by that, after leaching, pulp is diluted with water to residual acid concentration no higher than 3 M and by that gold is precipitated with sodium sulfite in two steps. EFFECT: avoided preliminary removal of nitric acid before precipitation of gold. 2 cl, 1 tbl, 8 ex</p> |
