CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
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
Source PublicationSCIENCE CHINA-CHEMISTRY
ISSN1674-7291
Volume59Issue:4Pages:497-504
AbstractThis 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.
KeywordTungstic Precipitation Pitzer Parameter Activity Coefficient Extraction
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11426-015-5505-8
Indexed BySCI
Language英语
WOS KeywordOSMOTIC COEFFICIENTS ; ELECTROLYTE SYSTEMS ; SODIUM TUNGSTATE ; PART I ; THERMODYNAMICS ; SOLVENT ; TOLUENE ; SINGLE
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21206168 ; 51178446)
WOS IDWOS:000373688500019
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20983
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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