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Determination and chemical modeling of the solubility of FeSO4 center dot 7H(2)O in the Ti(SO4)(2)center dot H2SO4 center dot H2O system
Zhang, Yan1; Li, Zhibao1; Asselin, Edouard2
2016-11-01
Source PublicationJOURNAL OF CHEMICAL THERMODYNAMICS
ISSN0021-9614
Volume102Issue:NOVPages:219-227
Abstract

The phase equilibrium and thermodynamic properties of FeSO4 center dot 7H(2)O in the FeSO4 center dot Ti(SO4) (2)center dot H2SO4 center dot H2O system are of critical significance because iron removal is one of the most important stages in the sulfate process for titania production. The solubility of the FeSO4 center dot 7H(2)O in the FeSO4 center dot Ti(SO4) (2)center dot H2SO4 center dot H2O system was measured over the temperature range from 278 to 298 K using a dynamic method. The initial concentrations of Ti(SO4)(2) and H2SO4 were 0.2-1.0 mol.kg(-1) and 2.0-3.5 mol.kg(-1), respectively. It was found that the solubility of FeSO4 center dot 7H(2)O significantly increased with the temperature throughout the entire concentration ranges of H2SO4 and Ti(SO4)(2). A new chemical model was developed by obtaining the parameters of the mixed-solvent electrolyte (MSE) model via regression of the solubility data of FeSO4 center dot 7H(2)O in the Ti (SO4)(2)center dot H2SO4 center dot H2O system. The model with the newly obtained parameters was successfully applied to predict the sulfate speciation in both FeSO4 center dot H2SO4 center dot H2O and FeSO4 center dot Ti(SO4)(2)center dot H2SO4 center dot H2O systems and the crystallization behavior of FeSO4 center dot 7H(2)O. The results will provide fundamental data and thermodynamic information for improving the existing sulfate process for the production of titanium dioxide pigment. (C) 2016 Elsevier Ltd.

KeywordChemical Modeling Mixed-solvent Electrolyte (Mse) Model Solubility Feso4 Center Dot 7h(2)o Ti(So4)(2)
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jct.2016.07.006
Indexed BySCI
Language英语
WOS KeywordPARTIAL MOLAL PROPERTIES ; HIGH-PRESSURES ; SULFURIC-ACID ; TRANSPORT-PROPERTIES ; SULFATE-SOLUTIONS ; CALCIUM-SULFATE ; TITANIUM ; TEMPERATURES ; SPECIATION ; ELECTROLYTES
WOS Research AreaThermodynamics ; Chemistry
WOS SubjectThermodynamics ; Chemistry, Physical
Funding OrganizationNational Natural Science Foundation of China(21506218 ; 21476235 ; U1407112)
WOS IDWOS:000382266200022
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21445
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada
Recommended Citation
GB/T 7714
Zhang, Yan,Li, Zhibao,Asselin, Edouard. Determination and chemical modeling of the solubility of FeSO4 center dot 7H(2)O in the Ti(SO4)(2)center dot H2SO4 center dot H2O system[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,2016,102(NOV):219-227.
APA Zhang, Yan,Li, Zhibao,&Asselin, Edouard.(2016).Determination and chemical modeling of the solubility of FeSO4 center dot 7H(2)O in the Ti(SO4)(2)center dot H2SO4 center dot H2O system.JOURNAL OF CHEMICAL THERMODYNAMICS,102(NOV),219-227.
MLA Zhang, Yan,et al."Determination and chemical modeling of the solubility of FeSO4 center dot 7H(2)O in the Ti(SO4)(2)center dot H2SO4 center dot H2O system".JOURNAL OF CHEMICAL THERMODYNAMICS 102.NOV(2016):219-227.
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