硫酸铵-硫氰酸铵-丙醇体系萃取分离钌(Ⅲ)

Separation of ruthenium(Ⅲ) by ammonium thiocyanate-n-propyl alcohol extraction system in the presenc

摘要: 研究了在硫酸铵存在下,硫氰酸铵-丙醇体系萃取分离钌(Ⅲ)的行为.试验表明,Ru(Ⅲ)与SCN-形成的Ru(SCN)4-很容易被萃取到丙醇相中,当溶液中硫酸铵、硫氰酸铵、丙醇浓度分别为0.2 g/mL、0.015mmol/mL、0.30 mL/mL,pH=4.5时能使钌(Ⅲ)的萃取率达到99.95%以上,因此Ru(Ⅲ)被定量萃取.Cr(Ⅲ)、Mn(Ⅱ)、N i(Ⅱ)、A l(Ⅲ)、Fe(Ⅱ)离子在该体系中基本不被萃取,实现了Ru(Ⅲ)与上述离子的分离.

Abstract: A study on liquid-liquid extraction of Ru(Ⅲ) based on ammonium thiocyanate-n-propyl alcohol in the presence of ammonium sulphate has been performed. It shows that the charged compound Ru(SCN)_4~- can be easily extracted into the n- propyl alcohol phase. The extraction rate of Ru(Ⅲ)reaches the 99.98% when the concentration of (NH_4)_2SO_4, NH_4SCN and n-propyl alcohol in system is 0.20 g/mL,0.015 mmol/mL and 0.30 mL/mL, respectively.Ru(Ⅲ)could be separated completely from Cr(Ⅲ)、Mn(Ⅱ)、Ni(Ⅱ)、Al(Ⅲ)、Fe(Ⅱ) at pH4...