| 摘要 |
PCT No. PCT/AU86/00269 Sec. 371 Date May 18, 1987 Sec. 102(e) Date May 18, 1987 PCT Filed Sep. 12, 1986 PCT Pub. No. WO87/01732 PCT Pub. Date Mar. 26, 1987.A method of refining a precious metal comprising the steps of inquarting the material containing the precious metal into an alloy, with a known quantity of a base metal to form an alloy of a known concentration of the precious metal, and dissolving the base metal in acid to leave the refined precious metal as a solid. Preferably the method is used to refine gold, and the acid used is nitric acid, followed by a secondary acid treatment of hydrochloric acid. |
