| 发明名称 | Method for recovering gold by solvent extraction | ||
| 摘要 | The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically. | ||
| 申请公布号 | US8926730(B2) | 申请公布日期 | 2015.01.06 |
| 申请号 | US201113702232 | 申请日期 | 2011.06.07 |
| 申请人 | Outotec Oyj | 发明人 | Paatero Erkki;Haapalainen Mika |
| 分类号 | C22B3/00;C25C1/20;C01G7/00;C22B3/26 | 主分类号 | C22B3/00 |
| 代理机构 | Buchanan, Ingersoll & Rooney, PC | 代理人 | Buchanan, Ingersoll & Rooney, PC |
| 主权项 | 1. A method for extracting gold selectively from its acidic chloride-based aqueous solution or solid-containing slurry by solvent extraction to produce pure gold, comprising using a diester of 2,2,4-trialkyl-1,3-pentanediol as an organic extraction reagent in solvent extraction; a gold-bearing organic solution that is formed is scrubbed with an acidic aqueous solution, after which gold is stripped into water, from where it is reduced to form pure gold. | ||
| 地址 | Espoo FI | ||