无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (8): 16-.

• 论文 • 上一篇    下一篇

TBP/MIBK溶解度参数及TM/H3PO4/H2O三元体系相平衡研究

黄美英1 ,任永胜2,李 军3 ,钟本和3   

  1. 1.重庆三峡学院化环学院,重庆万州404000;2.宁夏大学化学化工学院; 3.四川大学化工学院
  • 发布日期:2012-08-10

Study on solubility parameter of TBP/MIBK and phase equilibrium of TM/H3PO4/H2O

Huang Meiying1,Ren Yongsheng2,Li Jun3,Zhong Benhe3   

  1. 1.School of Chemical and Environmental Engineering,Chongqing Three Gorges University,Wanzhou 404000,China;
    2.School of Chemistry and Chemical Engineering, Ningxia University;3.School of Chemical Engineering,Sichuan University
  • Published:2012-08-10

摘要: 将磷酸三丁酯(TBP)与甲基异丁基甲酮(MIBK)混合用作萃取净化湿法磷酸的萃取剂,并针对TBP与MIBK的互溶性以及TBP+MIBK(简称为TM)萃取磷酸的相平衡进行了研究,测定了10~50 ℃时的纯TBP和MIBK的溶解度参数以及25 ℃和50 ℃下,TBP质量分数为10%~90%的TM/H3PO4/H2O三元体系相平衡数据。结果表明:TBP与MIBK的溶解度参数非常接近,温度对其影响很小,二者可以在任意温度下完全互溶;温度对TM萃取磷酸的萃取平衡影响不大,TM的组成对磷酸的萃取平衡有一定影响,TBP含量越高,萃取范围越宽;相反,萃取范围越窄,其萃取范围介于纯MIBK和纯TBP萃取磷酸之间。该研究结果为进一步研究TM萃取净化湿法磷酸奠定了理论基础。

关键词: 磷酸三丁酯, 甲基异丁基甲酮, 溶解度参数, 相平衡, 湿法磷酸

Abstract: A new extraction process for wet-process phosphoric acid by tributyl phosphate(TBP)+methy isobutyl ketone (MIBK)(abbreviated as TM) mixer was proposed.The miscibility of TBP and MIBK as well as phase equilibrium of wet-process phosphoric acid extraction by TM were also investigated.The solubility parameter of pure TBP or pure MIBK at 10~ 50 ℃ and the phase equilibrium data of TM/H3PO4/H2O ternary system at 25 ℃ and 50 ℃ when the mass fraction of TBP was at 10%~90% were determined.Experimental results showed that there was almost no effect of temperature on the solubility parameter of TBP and MIBK and they were miscible at any temperature, because their solubility is very close; temperature had little effect on phase equilibrium of wet-process phosphoric acid extraction by TM;composition of TBP and MIBK had certain effect on equilibrium.The higher content of TBP,the wider extraction range;on the contrary,the extraction range was narrower;TM′s extraction range was between pure MIBK and pure TBP.The results and data laid the theoretical foundation for extraction and purification of wet-process phosphoric acid by TM.

Key words: TBP, MIBK, phosphoric acid, solubility parameter, phase equilibrium, wet-process phosphoric acid

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