A green process for recovery of H2SO4 and Fe2O3 from FeSO4 center dot 7H(2)O by modeling phase equilibrium of the Fe(Pi)-SO42--H+-Cl- system
Zhang, Yan1; Li, Zhibao1; Zeng, Yan2; Demopoulos, George P.2
2017-10-01
发表期刊AICHE JOURNAL
ISSN0001-1541
卷号63期号:10页码:4549-4563
摘要

Ferrous sulfate heptahydrate FeSO47H(2)O is a major waste produced in titanium dioxide industry by the sulfate process and has caused heavy environmental problem. A new green process for the treatment of FeSO47H(2)O was proposed to make use of iron source and recycle sulfate source as H2SO4. It was found that by adding concentrated HCl to the FeSO4 solution, FeCl24H(2)O was crystallized out, which was subsequently calcined to produce Fe2O3 and HCl. Concentrated H2SO4 solution (about 65 wt %) was obtained by evaporating the FeCl24H(2)O-saturated filtrate. To facilitate the process development and design, the solubilities of FeCl24H(2)O in HCl, H2SO4, and HCl+H2SO4 solutions were measured and the experimental data were regressed with both the mixed-solvent electrolyte model and the electrolyte NRTL model. On the basis of the prediction of the optimum conditions for the crystallization of FeCl24H(2)O, material balance of the new process was calculated. FeCl24H(2)O and Fe2O3 were obtained from a laboratory-scale test with about 70% recovery of ferrous source for a single cycle, indicating the feasibility of the process. (c) 2017 American Institute of Chemical Engineers AIChE J, 63: 4549-4563, 2017

关键词Hematite Feso4 Center Dot 7h(2)o Common Ion Effect Phase Equilibrium Thermodynamic Modeling
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1002/aic.15795
收录类别SCI
语种英语
关键词[WOS]SOLVENT ELECTROLYTE SYSTEMS ; VAPOR-LIQUID-EQUILIBRIA ; THERMODYNAMIC PROPERTIES ; FERROUS SULFATE ; TRANSPORT-PROPERTIES ; CHEMICAL-EQUILIBRIA ; AQUEOUS-SOLUTIONS ; FERRIC-CHLORIDE ; DEGREES-C ; PRECIPITATION
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(21506218 ; 21476235 ; U1407112)
WOS记录号WOS:000409146600026
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23186
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.McGill Univ, Dept Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada
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Zhang, Yan,Li, Zhibao,Zeng, Yan,et al. A green process for recovery of H2SO4 and Fe2O3 from FeSO4 center dot 7H(2)O by modeling phase equilibrium of the Fe(Pi)-SO42--H+-Cl- system[J]. AICHE JOURNAL,2017,63(10):4549-4563.
APA Zhang, Yan,Li, Zhibao,Zeng, Yan,&Demopoulos, George P..(2017).A green process for recovery of H2SO4 and Fe2O3 from FeSO4 center dot 7H(2)O by modeling phase equilibrium of the Fe(Pi)-SO42--H+-Cl- system.AICHE JOURNAL,63(10),4549-4563.
MLA Zhang, Yan,et al."A green process for recovery of H2SO4 and Fe2O3 from FeSO4 center dot 7H(2)O by modeling phase equilibrium of the Fe(Pi)-SO42--H+-Cl- system".AICHE JOURNAL 63.10(2017):4549-4563.
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