CAS OpenIR
modelingfortungsticprecipitationandextractionbasedonpitzerequation
Zhang Xinyue1; Ning Pengge2; Xu Weifeng2; Cao Hongbin2; Zhang Yi1
2016
Source Publicationsciencechinachemistry
ISSN1674-7291
Volume59Issue:4Pages:497
AbstractThis work presented the results of tungstic precipitation from Na_2WO_4-Na_2SO_4-H_2O system at 293.15 K, with which the Pitzer parameters of β_(Na_2WO_4)~((0)) and β_(Na_2WO_4)~((1)) were determined from Pitzer equation by regression. Thus the mean ionic activity coefficients of sodium tungstate were calculated. The obtained β_(Na_2WO_4)~((0)) and β_(Na_2WO_4)~((1)) were substituted as fixed values in extraction modeling from Na_2WO_4-H_2SO_4-H_2O 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.
Language英语
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/35633
Collection中国科学院过程工程研究所
Affiliation1.天津大学
2.中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Zhang Xinyue,Ning Pengge,Xu Weifeng,et al. modelingfortungsticprecipitationandextractionbasedonpitzerequation[J]. sciencechinachemistry,2016,59(4):497.
APA Zhang Xinyue,Ning Pengge,Xu Weifeng,Cao Hongbin,&Zhang Yi.(2016).modelingfortungsticprecipitationandextractionbasedonpitzerequation.sciencechinachemistry,59(4),497.
MLA Zhang Xinyue,et al."modelingfortungsticprecipitationandextractionbasedonpitzerequation".sciencechinachemistry 59.4(2016):497.
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