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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
Source PublicationAICHE JOURNAL
ISSN0001-1541
Volume63Issue:10Pages:4549-4563
Abstract

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

KeywordHematite Feso4 Center Dot 7h(2)o Common Ion Effect Phase Equilibrium Thermodynamic Modeling
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1002/aic.15795
Indexed BySCI
Language英语
WOS KeywordSOLVENT ELECTROLYTE SYSTEMS ; VAPOR-LIQUID-EQUILIBRIA ; THERMODYNAMIC PROPERTIES ; FERROUS SULFATE ; TRANSPORT-PROPERTIES ; CHEMICAL-EQUILIBRIA ; AQUEOUS-SOLUTIONS ; FERRIC-CHLORIDE ; DEGREES-C ; PRECIPITATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21506218 ; 21476235 ; U1407112)
WOS IDWOS:000409146600026
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23186
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.McGill Univ, Dept Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada
Recommended Citation
GB/T 7714
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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