氯化锂、氯化钠在NMP中溶解度的测定与关联

doi:10.3969/j.issn.0438-1157.2014.12.003

化工学报 ›› 2014, Vol. 65 ›› Issue (12): 4664-4668.DOI: 10.3969/j.issn.0438-1157.2014.12.003

氯化锂、氯化钠在NMP中溶解度的测定与关联

李柏春, 杜东雪, 张文林, 孟楷

河北工业大学化工学院, 天津 300130

收稿日期:2014-07-10 修回日期:2014-08-26 出版日期:2014-12-05 发布日期:2014-12-05
通讯作者: 李柏春

Determination and correlation of solubilities of lithium chloride and sodium chloride in NMP

LI Baichun, DU Dongxue, ZHANG Wenlin, MENG Kai

College of Chemical Engineering Science, Hebei University of Technology, Tianjin 300130, China

Received:2014-07-10 Revised:2014-08-26 Online:2014-12-05 Published:2014-12-05

摘要/Abstract

摘要： 为了回收聚苯硫醚生产中的助剂氯化锂,对氯化锂、氯化钠在溶剂NMP(N-甲基吡咯烷酮)中的溶解性能进行了研究.利用激光衍射辅助法在297.95～364.75 K温度范围内对氯化锂、氯化钠在NMP中的溶解度进行了测定,并用经验方程、λh方程、改进的NRTL方程对氯化锂在NMP中的溶解度数据进行关联.结果证明,改进的NRTL方程的拟合结果最好,平均相对偏差仅为0.41%,可适用于较高温度下氯化锂-NMP体系溶解度的数据估计.

关键词: 激光法, 氯化锂, 回收, NMP, 相平衡, 改进的NRTL方程, 参数估值

Abstract: In order to recover the additive lithium chloride in the polyphenylene sulfide production, the disolution of lithium chloride and sodium chloride in solvent N-methyl pyrrolidone (NMP) was studied. By using laser diffraction assistance method, solubility data of lithium chloride and sodium chloride in NMP were measured between 297.95 K and 364.75 K. Empirical formula, λh equation and improved NRTL equation were used to correlate the solubility data of lithium chloride in NMP. The results show that the solubility of lithium chloride increases with temperature while that of sodium chloride almost keeps unchanged. The improved NRTL equation can predict the solubility data well and the relative average error is 0.41%. Thus the K-NRTL equation is most suitable for description of solid-liquid equilibrium of lithium chloride in NMP at high temperature.

Key words: laser diffraction assistance method, lithium chloride, recovery, NMP, phase equilibria, improved NRTL equation, parameter estimation

中图分类号:

TQ013.1

李柏春, 杜东雪, 张文林, 孟楷. 氯化锂、氯化钠在NMP中溶解度的测定与关联[J]. 化工学报, 2014, 65(12): 4664-4668.

LI Baichun, DU Dongxue, ZHANG Wenlin, MENG Kai. Determination and correlation of solubilities of lithium chloride and sodium chloride in NMP[J]. CIESC Journal, 2014, 65(12): 4664-4668.

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氯化锂、氯化钠在NMP中溶解度的测定与关联

Determination and correlation of solubilities of lithium chloride and sodium chloride in NMP

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