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研究结果表明,烷基磷酸醋可从碱性氰化物溶液中溶剂化萃取金。看来磷酸三丁酯(TBP)和丁基膦酸二丁酯似乎都是金的有效萃取剂,且其饱和容量都高于30g/L。在一定条件下,从碱性氰化物溶液中萃取金的选择性系数比其它的含氰阴离子高1000倍。根据萃取化学原理(其中还包括M~+…Au(CN)_(2~-)离子对的溶剂化作用),讨论了诸如离子强度、温度和萃取剂结构等参数对萃取选择性的影响。
The results show that alkyl phosphates solvate gold from alkaline cyanide solutions. It appears that tributyl phosphate (TBP) and dibutylbutylphosphinate all appear to be effective gold extractants with saturation capacities above 30 g / L. Under certain conditions, the selectivity of gold extracted from alkaline cyanide solution is 1000 times higher than that of other cyanide-containing anions. According to the principle of extraction chemistry, which includes the solvation of M ~ + ... Au (CN) _ (2 ~ -) ion pairs, the effects of parameters such as ionic strength, temperature and extractant structure on the selectivity of extraction were discussed.