【摘要】 在含有一定浓度硫酸铵的条件下,乙醇水溶液能形成盐水与乙醇液-液两相,研究了Mo(Ⅵ)与3,5二溴水杨基荧光酮(DBSAF)形成的配合物在乙醇盐水萃取体系液-液两相中的分配行为。试验表明,在pH1~6范围内,硫酸铵浓度为350g·L-1,试液中乙醇与水的体积比为3比7,1×10-4mol·L-1 DBSAF溶液加入量为2mL及试液总体积为10mL的条件下,Mo(Ⅵ)均保持很高的萃取率,用控制酸度的方法实现了Mo(Ⅵ)与常见过渡元素离子Co(Ⅱ)、Zn(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Mn(Ⅱ)、Fe(Ⅲ)、W(Ⅵ)的定量分离,试验了钼(Ⅵ)与上述各共存离子的分离,钼(Ⅵ)的萃取率均大于97%,而其他共存离子的萃取率均小于5%。更多还原

【Abstract】 Partition behavior of the coordination complex formed by Mo(Ⅵ)and 3,5-dibromosalicylflurone(DBSAF)between aqueous-salt phase and ethanol phase in an aqueous ethanol solution was studied.Under the optimum conditions of ① pH 1-6,② concn.of(NH4)SO4:0.35 g·mL-1,③ volume ratio of ethanol to H2O in the test solution:3 to 7,④ amount of 1×10-4mol·L-1 DBSAF solution added:2.0 mL and ⑤ total volume of test solution:10 mL,Mo(Ⅵ)was effectively separated from several common co-existing cations,e.g.Co(Ⅱ),Zn(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Mn(Ⅱ),Fe(Ⅲ)and W(Ⅵ).The rate of extraction of Mo(Ⅵ)was found achieving to values over 97%,while the extraction rates of co-existing cation were less than 5%更多还原