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Measurement and Chemical Modeling of the Solubility of Na2SiO3 center dot 9H(2)O and Na2SiO3 in Concentrated NaOH Solution from 288 to 353 K
Alternative TitleInd. Eng. Chem. Res.
Zeng, Yan1; Zhang, Yan1; Li, Zhibao1; Demopoulos, George P.2
2014-06-11
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:23Pages:9949-9958
AbstractIn order to comprehensively use magnesium and silicon resources existing in serpentine ore, an efficient process for decomposing serpentine by the use of concentrated NaOH solution is proposed at elevated temperature. In this new process, magnesium is obtained as residues with the form of Mg(OH)(2) after filtration, while silicon is dissolved in an alkaline solution and then separated by a crystallization operation with the common ion effect of NaOH at relatively low temperature. Solubilities of sodium metasilicate nonahydrate (Na2SiO3 center dot 9H(2)O) and anhydrous sodium metasilicate (Na2SiO3) in NaOH solutions were measured. The experiments were carried out at the temperature range from 288.2 to 313.2 K and 343.2 to 353.2 K for these two solids, respectively. Over the investigated concentration range from 0.0 to 11.2 mol.kg(-1), the addition of NaOH caused the solubility of both Na2SiO3 center dot 9H(2)O and Na2SiO3 to decrease due to common ion effect. It was also found that increasing the temperature favored the solubility of sodium metasilicate nonahydrate but depressed the solubility of anhydrous sodium metasilicate in NaOH solutions. A chemical model has been established with newly obtained interaction parameters of the Bromley-Zemaitis model by regressing the experimental solubility of Na2SiO3 center dot 9H(2)O in NaOH solutions from 288.2 to 313.2 K along with the experimental solubility data of Na2SiO3 in NaOH solutions at 353.2 K.; In order to comprehensively use magnesium and silicon resources existing in serpentine ore, an efficient process for decomposing serpentine by the use of concentrated NaOH solution is proposed at elevated temperature. In this new process, magnesium is obtained as residues with the form of Mg(OH)(2) after filtration, while silicon is dissolved in an alkaline solution and then separated by a crystallization operation with the common ion effect of NaOH at relatively low temperature. Solubilities of sodium metasilicate nonahydrate (Na2SiO3 center dot 9H(2)O) and anhydrous sodium metasilicate (Na2SiO3) in NaOH solutions were measured. The experiments were carried out at the temperature range from 288.2 to 313.2 K and 343.2 to 353.2 K for these two solids, respectively. Over the investigated concentration range from 0.0 to 11.2 mol.kg(-1), the addition of NaOH caused the solubility of both Na2SiO3 center dot 9H(2)O and Na2SiO3 to decrease due to common ion effect. It was also found that increasing the temperature favored the solubility of sodium metasilicate nonahydrate but depressed the solubility of anhydrous sodium metasilicate in NaOH solutions. A chemical model has been established with newly obtained interaction parameters of the Bromley-Zemaitis model by regressing the experimental solubility of Na2SiO3 center dot 9H(2)O in NaOH solutions from 288.2 to 313.2 K along with the experimental solubility data of Na2SiO3 in NaOH solutions at 353.2 K.
KeywordPartial Molal Properties High-pressures Transport-properties Serpentine Temperatures Magnesium Electrolytes 25-degrees-c Dissolution Carbonation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie500590w
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPARTIAL MOLAL PROPERTIES ; HIGH-PRESSURES ; TRANSPORT-PROPERTIES ; SERPENTINE ; TEMPERATURES ; MAGNESIUM ; ELECTROLYTES ; 25-DEGREES-C ; DISSOLUTION ; CARBONATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000337337000046
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11023
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.McGill Univ, Dept Mat Engn, Montreal, PQ H3A 2B2, Canada
Recommended Citation
GB/T 7714
Zeng, Yan,Zhang, Yan,Li, Zhibao,et al. Measurement and Chemical Modeling of the Solubility of Na2SiO3 center dot 9H(2)O and Na2SiO3 in Concentrated NaOH Solution from 288 to 353 K[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(23):9949-9958.
APA Zeng, Yan,Zhang, Yan,Li, Zhibao,&Demopoulos, George P..(2014).Measurement and Chemical Modeling of the Solubility of Na2SiO3 center dot 9H(2)O and Na2SiO3 in Concentrated NaOH Solution from 288 to 353 K.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(23),9949-9958.
MLA Zeng, Yan,et al."Measurement and Chemical Modeling of the Solubility of Na2SiO3 center dot 9H(2)O and Na2SiO3 in Concentrated NaOH Solution from 288 to 353 K".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.23(2014):9949-9958.
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