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Dissolution Behavior of Aluminum, Silicon, and Iron of Diaspore Concentrate in NaOH-NaAl(OH)(4) Solutions at Elevated Temperature
Zeng, Lanmu; Li, Zhibao
2013-12-25
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume52Issue:51Pages:18429-18439
AbstractThe high temperature dissolution behavior of diaspore concentrate was measured in concentrated NaOH-NaAl(OH)(4) solutions. The dissolution rate of Al was greatly found to be enhanced by increasing NaOH concentration and temperature while decreased with addition of Al(OH)(3). The concentration of Si as the main impurity constantly decreases with reaction time while the Fe is retained at a limited level. The generalized rate law for mineral dissolution and precipitation, proposed by Lasaga (Lasaga, A. C. Kinetic Theory in the Earth Science; Princeton University Press: Princeton, NJ, USA, 1998), was applied to model the kinetic behavior of Al on the basis of K-sp(diaspore) and the activity coefficients of related species in the solution. The resulting kinetic model was capable of predicting the dissolution rate of Al in the Bayer liquor. The apparent activation energy of the dissolution reaction over the temperature range from 473.2 to 543.2 K was estimated at 83 kj.mol(-1).
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie402867n
Indexed BySCI
Language英语
WOS KeywordFLUID-SOLID REACTIONS ; RANDOM PORE MODEL ; BAYER PROCESS ; BAUXITE ; SOLUBILITY ; DIGESTION ; ALUMINOSILICATES ; GIBBSITE ; BOEHMITE ; KINETICS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000329137500033
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13332
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zeng, Lanmu,Li, Zhibao. Dissolution Behavior of Aluminum, Silicon, and Iron of Diaspore Concentrate in NaOH-NaAl(OH)(4) Solutions at Elevated Temperature[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2013,52(51):18429-18439.
APA Zeng, Lanmu,&Li, Zhibao.(2013).Dissolution Behavior of Aluminum, Silicon, and Iron of Diaspore Concentrate in NaOH-NaAl(OH)(4) Solutions at Elevated Temperature.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,52(51),18429-18439.
MLA Zeng, Lanmu,et al."Dissolution Behavior of Aluminum, Silicon, and Iron of Diaspore Concentrate in NaOH-NaAl(OH)(4) Solutions at Elevated Temperature".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 52.51(2013):18429-18439.
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