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
发表期刊JOURNAL OF CHEMICAL THERMODYNAMICS
ISSN0021-9614
卷号102期号:NOV页码:219-227
摘要

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.

关键词Chemical Modeling Mixed-solvent Electrolyte (Mse) Model Solubility Feso4 Center Dot 7h(2)o Ti(So4)(2)
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.jct.2016.07.006
收录类别SCI
语种英语
关键词[WOS]PARTIAL MOLAL PROPERTIES ; HIGH-PRESSURES ; SULFURIC-ACID ; TRANSPORT-PROPERTIES ; SULFATE-SOLUTIONS ; CALCIUM-SULFATE ; TITANIUM ; TEMPERATURES ; SPECIATION ; ELECTROLYTES
WOS研究方向Thermodynamics ; Chemistry
WOS类目Thermodynamics ; Chemistry, Physical
项目资助者National Natural Science Foundation of China(21506218 ; 21476235 ; U1407112)
WOS记录号WOS:000382266200022
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21445
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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