湿法电解含金萃取有机相制备金的研究

提出了一种在湿法冶金同时电解载金属有机相制备金属的新方法.并通过电解磷酸三丁酯(TBP)萃取Au(CN)₂^--R₄N⁺的载金有机相制金.考察了电解技术条件、Au浓度、电解质浓度及还原剂等因素对Au回收率的影响.结果表明,此方法不仅可省去冗长的反萃和还原等步骤,而且可以直接以高回收率制备高纯度的金箔;在电解液中加入少量还原剂可明显提高金的回收率.该法也适用于制备银和铜,制备银时所用体系与金相似,但制备铜则在D₂EHPA-正庚烷为载铜有机相及电解质的酸性溶液为水相的体系中进行.

Hydrometallurgical Preparation of Gold by Electrolysis from Gold-loaded Organic Phase

A new method on direct electrolysis recovery of gold from loaded-metal organic phase with electrolyte aqueous solution together was reported . Electrolysis recovery of gold from the organic phase of extracting Au(CN) -R_4N + by tributyl phosphate(TBP) was studied. Many influences on the recovery of gold were investigated,such as the technical conditions of electrolysis,the concentration of gold,the type and concentration of electrolytes and the effect of the reducing agents. The results show that this method not only omits the traditional procedures such as stripping and reducing and so on,but also obtains adherent sheet gold of high quality with a high recovery rate. And by addtion of small quantity of reducing agent in electrolyte solution,the recovery rate can be further improved. This method was also suitable for the recovery of silver and copper. To prepare silver,the used system was similar to that of preparing gold,but to prepare copper,it should be performed in the system of the Cu-loaded D_2EHPA-heptane organic phase with aqueous acidic solution of some electrolytes together. WT5HZ]