应用恒界面池法研究磷酸三丁酯萃取磷酸的动力学  

Studies on extraction kinetics of phosphoric acid by tributyl phosphate using method of constant interfacial area stirred cell

作　　者：金士威[1] 易琼[2] 张旭[1] 高荣[1] 丁一刚[1] 

机构地区：[1]武汉工程大学化工与制药学院绿色化工过程省部共建教育部重点实验室,湖北武汉430074 [2]湖北大学化学化工学院,湖北武汉430062

出　　处：《武汉工程大学学报》2011年第2期34-37,共4页Journal of Wuhan Institute of Technology

基　　金：国家十一五科技支撑计划(2007BAB08B09)

摘　　要：采用恒界面池法研究了磷酸三丁酯(TBP)从盐酸法湿法磷酸体系萃取磷酸的动力学.考察了两相接触面积、搅拌强度、水相中初始磷酸和盐酸浓度等对磷酸萃取速率的影响.结果表明,磷酸的初始正向萃取速率随两相界面积、搅拌转速、水相初始磷酸和盐酸浓度的增大而增大.TBP对磷酸的萃取可能属扩散控制模式.其萃取动力学方程为R(H3PO4)=2.51×10-6C(H30PO4)0.70CHCl0.61.The extraction kinetics of phosphoric acid in wet-process with hydrochloric acid by tributyl phosphate （TBP） was investigated by using a constant interracial area stirred cell. The effects of interracial area between two phases, stirring rate, the initial concentrations of phosphoric acid and hydrochloric acid in aqueous phase on the extraction rate of phosphoric acid were studied. The results showed that the initial forward extraction rate of phosphoric acid increased with the increasing of interracial area between the two phases, stirring rate, the initial concentrations of phosphoric acid and hydrochloric acid in aqueous phase. The process of phosphoric acid extraction with TBP might be controlled by a diffusion controlling regime. The extraction rate equation of phosphoric acid was 6 0.70 0.61 established from experimental results as follows：R（H2PO4）=2. 51 × 10^-6 C（HaPO4） C^0.61 HCI.

关 键 词：磷酸 盐酸 磷酸三丁酯 萃取动力学 恒界面池 

分 类 号：TQ013.2[化学工程]