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Solubility and Modeling of Sodium Aluminosilicate in NaOH-NaAI(OH)(4) Solutions and Its Application to Desilication
Alternative TitleInd. Eng. Chem. Res.
Zeng, Lanmu; Li, Zhibao
2012-11-21
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume51Issue:46Pages:15193-15206
AbstractThe solubility of :sodium aluminosilicate (sodalite), a major desilication product (DSP) in the Bayer process, in NaOH and NaOH-NaAl(OH)(4) solutions was determined and modeled from 3.03.2 to 34 4 K Sodium aluminosilicate was synthesized in a batch crystallizer and the effect of temperature, solution concentrations, and aging time Was investigated. Solubility was found to increase with increasing NaOH concentration while the solubility sharply decreases with the addition of Al(OH)(3), reaches a minimum at about 0.8 mol.L-1, and then increases A mixed-solvent electrolyte (MSE) model for the solubility of sodalite was developed with the help of the OLI platform via regression to obtain the model parameters. In addition, the desilication kinetics of NaOH-NaAl(OH)(4) solutions by using sodalite as seeds was studied experimentally and modeled with the aid of a second order kinetic model. The activation energy of desilication over the temperature range 323.2-363.2 K was found to be 92 +/- 14 kJ.mol(-1). Under the optimal operation conditions, 80% silica was removed after 2 h.; The solubility of :sodium aluminosilicate (sodalite), a major desilication product (DSP) in the Bayer process, in NaOH and NaOH-NaAl(OH)(4) solutions was determined and modeled from 3.03.2 to 34 4 K Sodium aluminosilicate was synthesized in a batch crystallizer and the effect of temperature, solution concentrations, and aging time Was investigated. Solubility was found to increase with increasing NaOH concentration while the solubility sharply decreases with the addition of Al(OH)(3), reaches a minimum at about 0.8 mol.L-1, and then increases A mixed-solvent electrolyte (MSE) model for the solubility of sodalite was developed with the help of the OLI platform via regression to obtain the model parameters. In addition, the desilication kinetics of NaOH-NaAl(OH)(4) solutions by using sodalite as seeds was studied experimentally and modeled with the aid of a second order kinetic model. The activation energy of desilication over the temperature range 323.2-363.2 K was found to be 92 +/- 14 kJ.mol(-1). Under the optimal operation conditions, 80% silica was removed after 2 h.
KeywordSpent Bayer Liquor Alkaline-solutions Diasporic-bauxite Zeolite-a Sodalite Cancrinite Speciation Kinetics Ions
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie301590r
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSPENT BAYER LIQUOR ; ALKALINE-SOLUTIONS ; DIASPORIC-BAUXITE ; ZEOLITE-A ; SODALITE ; CANCRINITE ; SPECIATION ; KINETICS ; IONS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000311325200028
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6485
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zeng, Lanmu,Li, Zhibao. Solubility and Modeling of Sodium Aluminosilicate in NaOH-NaAI(OH)(4) Solutions and Its Application to Desilication[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2012,51(46):15193-15206.
APA Zeng, Lanmu,&Li, Zhibao.(2012).Solubility and Modeling of Sodium Aluminosilicate in NaOH-NaAI(OH)(4) Solutions and Its Application to Desilication.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,51(46),15193-15206.
MLA Zeng, Lanmu,et al."Solubility and Modeling of Sodium Aluminosilicate in NaOH-NaAI(OH)(4) Solutions and Its Application to Desilication".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 51.46(2012):15193-15206.
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