皂化P204微乳液萃取钛的研究  

Extraction of Titanium(Ⅳ) Using Microemulsion System of Saponified P204/n-heptane/n-butanol

作　　者：李甫[1] 周李娜[1] 李大枝[1] 

机构地区：[1]滨州学院化学工程系,山东滨州256600

出　　处：《山东化工》2016年第15期38-41,共4页Shandong Chemical Industry

基　　金：滨州学院科研基金重大项目(2014ZDL03)

摘　　要：以皂化二(2-乙基己基)磷酸酯(P204)为表面活性剂,选择醇为助表面活性剂,正庚烷为有机相,构建微乳体系,探究微乳体系对钛(IV)的萃取效率。考察了助表面活性剂的种类、p H值、水乳比、震荡时间及水浴温度等对钛(IV)萃取率的影响。确定了最佳工艺参数:以正丁醇为助表面活性剂,皂化P204、正丁醇、正庚烷的体积比为4∶15∶35,水浴温度298.15 K,P204与Na OH的物质的量比为1∶1.5,外水相p H值为2.0,水乳比8,振荡时间8min。该工艺条件下,当外水相钛(IV)浓度为100 mg/L,微乳体系对钛(IV)的萃取率为96.2%。萃取后的有机相用1.0 mol/L的盐酸进行反萃,钛(IV)的平均反萃率为88.1%。有机相使用1.0 mol/L氢氧化钠皂化后,可以循环使用。A simple microemulsion system was proposed for extraction titanium（IV）,in which saponified P204 and n-heptane was used as surfactant and solvent,respectively.The factors affecting the extraction rate such as the type of cosurfactant,p H value of external aqueous phase,the ratio of volume between external aqueous phase and microemulsion,the oscillating period of water bath and the oscillating temperature of water bath were investigated.In this microemulsion system,the volume ratio of saponified P204,n-butanol and n-heptane was 4 ∶ 15 ∶ 35.The concentration of the external aqueous titanium（IV） was 100 mg/L.The optimum condition was assured as follows∶ water bath temperature of 298.15 K,vibration time for 8 min,molar ratio of P204 and Na OH 1 ∶ 1.5,p H 2.0,volume ratio of aqueous phase and microemulsion 8.Under the optimum condition,the extraction yield of titanium was 96.2%.The average reverse extraction yield of titanium was 88.1% when 1.0 mol/L HCl was used as reverse extraction experiments to the organic phase.The organic phase after stripping can be reused.

关 键 词：皂化P204 微乳萃取 钛(IV) 

分 类 号：O658.2[理学—分析化学]