【摘要】 研究了正丁基-苯并噻唑亚砜(NBBSO)萃取酸性硫脲介质中Au(I)的性能。用2.3mol/LNBBSO从[Au(I)]=0.200mg/mL,[H+]=0.08mol/L的溶液中萃取金,一次萃取率高达95%。NBBSO萃取金速度较快,5min达到萃取平衡,负载有机相用12.5%Na2SO3溶液反萃,反萃率达99.2%。对不同结构的烃基-苯并噻唑亚砜萃取硫脲介质中金的性能进行研究,结果表明亚砜的萃取性能受亚砜配位基团的电子密度和取代基的空间效应影响。更多还原

【Abstract】 The capability of extraction Au(I)with n-butyl benzothiazole sulphoxide(NBBSO) from gold-thiourea leaching solution was investigated. The 95% extraction rate was obtained with 2.3mol/L NBBSO in 0.200mg/mL Au(I), 0.08mol/L [H+] solution. This rapid reaction reached equilibrium in 5 minutes. 99.2% stripping of Au(I)was achieved with 12.5% Na2SO3. And the structural effects of alkyl(benzyl) benzothiazole sulphoxides on the extraction of Au(I)-thiourea leaching solution were reported. The extraction behavior of these sulphoxides may be affected by charge density of coordination group and steric substituents effects.更多还原