文献类型：期刊文献

英文题名：Extraction Equilibrium of Hydrochloric Acid at Low Concentrations between Water and N235 in Isoamyl Alcohol Solution: Experiments and Simulation

作者：Li, Yunzhao[1];Song, Xingfu[1];Sun, Shuying[1];Xu, Yanxia[1];Yu, Jianguo[1,2]

机构：[1]E China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：60

期号：10

起止页码：3000

外文期刊名：JOURNAL OF CHEMICAL AND ENGINEERING DATA

收录：;EI(收录号：20154201387187);WOS:【SCI-EXPANDED(收录号:WOS:000362701300020)】；

基金：This study is financially supported by the National High Technology Research and Development Program of China (Grant No. 2011AA06A107)

语种：英文

外文关键词：Chlorine compounds - Extraction - Thermodynamic properties - Equilibrium constants

摘要：N235 in isoamyl alcohol solution acts as an efficient extraction system for the revovery of hydrochloric acid (HCl) at very low concentrations in a coupled reactive extraction-crystallization process. In this study, the extraction equilibrium of N235 + isoamyl alcohol + HCl + H2O system was investigated systematically. The formation of the extraction complex in the organic phase was determined by using the experimental data and it was confirmed to be (HCl)(4)(R3N)(4)(H2O)(8). Further, the thermodynamic model was then established by using Pitzer equation to calculate the activities of all the species. The values of the interaction parameters obtained by regression are as follows: beta((org))(R3N,4:4:8) = 2.8782 and beta((org))(4:4:8,4:4:8) = 11.4764. The extraction equilibrium constant is ln K-4:4:8 = 38.0274. The thermodynamic model was demonstrated to be reliable and suitable for the N235 + isoamyl alcohol + HCl + H2O system.