中空纤维膜器中乳化液膜体系提取铟的研究  

Study on the Extraction of In (Ⅲ) by Emulsion Liquid Membrane System in Hollow Fiber Contactor

作　　者：龚福忠[1] 赖洁[1] 白永庆 周立亚[1] 廖孙启[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西防城港市质量技术监督局,广西防城港538001

出　　处：《高校化学工程学报》2013年第4期573-578,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(20966001)

摘　　要：采用中空纤维支撑乳化液膜非分散提取工艺,对所构建的乳化液膜体系OP-4/流动载体/液体石蜡/煤油/盐酸进行In(Ⅲ)的提取研究,考察了流动载体、乳化剂OP-4浓度、内相盐酸浓度、料液/乳液流速比等因素对提取结果的影响,计算了膜的渗透通量和渗透系数。结果表明:在所考察的三种流动载体P204[二(2-乙基己基)磷酸]、P507[二(2-乙基己基-单-乙基己基)磷酸]、TBP(磷酸三丁酯)中,P204对In(Ⅲ)的提取效果最好;随着乳化剂OP-4浓度增大,提取率降低;内相盐酸浓度为2 mol·L-1时提取率最高,达到99.6%;料液/乳液流速比越大,提取率越低;膜的渗透通量和渗透系数随着料液/乳液流速比的增大而增大。在含杂质Fe(Ⅲ)、Zn(Ⅱ)、Cu(Ⅱ)的料液中,各离子提取率大小顺序为In(Ⅲ)(81.5%)>Fe(Ⅲ)(71.9%)>Zn(Ⅱ)(25.3%)>Cu(Ⅱ)(3.4%),表明Fe(Ⅲ)对In(Ⅲ)的提取有较大影响。A non-dispersive extraction technique with an emulsion liquid membrane supported by hollow-fiber-contactor was used for the extraction of In（Ⅲ） from the dilute feed aqueous.The emulsion system is consisted of OP-4/mobile carrier/kerosene/ paraffin/ HCl solution,in which the OP-4 acts as emulsifier.The influences of some factors,such as species of mobile carriers,OP-4 concentrations,HCl solution concentrations and flow rate ratio of feed to emulsion,on the extraction were studied,both the permeation flux and permeation coefficient were also calculated.Results reveal that,amount all the three mobile carriers P204,P507,TBP,the P204 shows the best extraction ability.The In（Ⅲ） extraction percentage decreases with the increase of OP-4 concentration and flow rate ratios of feed to emulsion,while the HCl solution concentration is 2 mol·L-1,the In（Ⅲ） extraction percentage reaches a highest value of 99.6%.Meanwhile,the permeation flux and permeation coefficient increase with the increase of flow rate ratios of feed to emulsion.When this technique was applied to extract In（Ⅲ） from a simulated feed liquid containing In（Ⅲ） and impurity ions of Fe（Ⅲ）、Zn（Ⅱ） and Cu（Ⅱ）,the ion extraction percentages are in the order of In（Ⅲ）（81.5%） Fe（Ⅲ）（71.9%） Zn（Ⅱ）（25.3%） Cu（Ⅱ）（3.4%）,which shows that Fe（Ⅲ） has an obvious influence on In（Ⅲ） extraction.

关 键 词：中空纤维支撑乳化液膜 非分散提取 铟 渗透通量 渗透系数 

分 类 号：O648.23[理学—物理化学] TQ028.8[理学—化学]