氯化钠-硫氰酸钾-正丙醇体系析相萃取分离和富集钛(Ⅳ)  

Study on extraction and enrichment of titanium(Ⅳ) by phase separation with sodium chloride-potassium thiocyanate-1-propanol system

作　　者：卢先春[1] 司学芝[2] 马冬冬[1] 许春萱[1] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]河南工业大学化学化工学院,河南郑州450052

出　　处：《冶金分析》2012年第6期77-80,共4页Metallurgical Analysis

基　　金：河南省教育厅自然科学研究计划项目(2006150023)

摘　　要：研究了正丙醇-硫氰酸钾-水体系析相萃取分离和富集Ti?的行为及与一些金属离子分离的条件。结果表明,氯化钠能使正丙醇的水溶液分成两相,在分相过程中,Ti(Ⅳ)和硫氢化钾生成的Ti(SCN)62-与质子化正丙醇C3H7OH2+形成的缔合物[Ti(SCN)62-][C3H7OH2+]2能被正丙醇相完全萃取。当正丙醇、硫氰酸钾和氯化钠的浓度分别为30%(V/V)、8.0×10-2mol/L和0.17g/mL时,Ti(Ⅳ)的萃取率达到98.9%以上,V(Ⅴ)、Ce(Ⅲ)、Mg(Ⅱ)、Mn(Ⅱ)、Cd(Ⅲ)、Cr(Ⅲ)、Al(Ⅲ)、Fe(Ⅱ)、Zn(Ⅱ)、Ni(Ⅱ)、Ag(Ⅰ)和W(Ⅵ)不被萃取,实现了Ti(Ⅳ)与上述金属离子的分离。对合成水样中的钛进行分离和测定,结果满意。The enrichment and extraction behaviors of titanium（IV） in 1propanolpotassium thiocyanate aqueous system and the separation conditions from other metal ions were investigated. The results showed that the 1propanol aqueous solution could be well divided＇ into two phases in the presence of sodium chloride. The complex of ETi（SCN）62][C3HT（）Hz＋ ] formed from protonized 1propanol （ [C：H7OH2 ]2） and [Ti（SCN）62] （which was generated by titanium （IV） and potassium thiocyanate） could be completely extracted by 1propanol during the phase separation process. When the concentra tion of 1propanol, potassium thiocyanate and sodium chloride was 30% （V/V）, 8.0 X 10^2 mol/L and 0.17 g/mL, respectively, the extraction yield of titanium（IV） was higher than 98.9% while VV（Ⅴ）、Ce（Ⅲ）、Mg（Ⅱ）、Mn（Ⅱ）、Cd（Ⅲ）、Cr（Ⅲ）、Al（Ⅲ）、Fe（Ⅱ）、Zn（Ⅱ）、Ni（Ⅱ）、Ag（Ⅰ）andW（Ⅵ） were not extracted to realize the separation of titanium（IV） from the abovementioned metal ions. This method has Been successfully ap plied to the determination and extraction separation of titanium in the sample of synthetic water with satisfactory results.

关 键 词：钛 正丙醇 硫氰酸钾 氯化钠 萃取分离 

分 类 号：O658.2[理学—分析化学]