Modeling for tungstic precipitation and extraction based on Pitzer equation
Zhang, Xinyue1,2,3; Ning, Pengge2; Xu, Weifeng2; Cao, Hongbin2; Zhang, Yi1,2,3
2016-04-01
发表期刊SCIENCE CHINA-CHEMISTRY
ISSN1674-7291
卷号59期号:4页码:497-504
摘要This work presented the results of tungstic precipitation from Na2WO4-Na2SO4-H2O system at 293.15 K, with which the Pitzer parameters of and were determined from Pitzer equation by regression. Thus the mean ionic activity coefficients of sodium tungstate were calculated. The obtained and were substituted as fixed values in extraction modeling from Na2WO4-H2SO4-H2O system by primary amine (N1923) in toluene as diluent. Meanwhile the activity coefficient expressions in organic phase were varied based on Pitzer theory that the interaction term for the solvent should not be included. The Pitzer parameters for organic phase were re-regressed in order to make the model more accurate. The average absolute relative deviation (AARD) for calculated and experimental molality of WO (4) (2-) in aqueous phase was 5.24%. The results showed that the model can not only correlate but also predict the liquid-liquid equilibrium (LLE) data.
关键词Tungstic Precipitation Pitzer Parameter Activity Coefficient Extraction
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1007/s11426-015-5505-8
收录类别SCI
语种英语
关键词[WOS]OSMOTIC COEFFICIENTS ; ELECTROLYTE SYSTEMS ; SODIUM TUNGSTATE ; PART I ; THERMODYNAMICS ; SOLVENT ; TOLUENE ; SINGLE
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National Natural Science Foundation of China(21206168 ; 51178446)
WOS记录号WOS:000373688500019
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20983
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Tianjin Univ, Sch Chem Engn & Technol, Natl Engn Res Ctr Distillat Technol, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
3.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
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Zhang, Xinyue,Ning, Pengge,Xu, Weifeng,et al. Modeling for tungstic precipitation and extraction based on Pitzer equation[J]. SCIENCE CHINA-CHEMISTRY,2016,59(4):497-504.
APA Zhang, Xinyue,Ning, Pengge,Xu, Weifeng,Cao, Hongbin,&Zhang, Yi.(2016).Modeling for tungstic precipitation and extraction based on Pitzer equation.SCIENCE CHINA-CHEMISTRY,59(4),497-504.
MLA Zhang, Xinyue,et al."Modeling for tungstic precipitation and extraction based on Pitzer equation".SCIENCE CHINA-CHEMISTRY 59.4(2016):497-504.
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