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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
	Zeng, Yan1; Zhang, Yan1; Li, Zhibao1; Demopoulos, George P.2
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2014-06-11
卷号	53期号:23页码:9949-9958
关键词	PARTIAL MOLAL PROPERTIES HIGH-PRESSURES TRANSPORT-PROPERTIES SERPENTINE TEMPERATURES MAGNESIUM ELECTROLYTES 25-DEGREES-C DISSOLUTION CARBONATION
ISSN号	0888-5885
其他题名	Ind. Eng. Chem. Res.
中文摘要	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.
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	PARTIAL MOLAL PROPERTIES ; HIGH-PRESSURES ; TRANSPORT-PROPERTIES ; SERPENTINE ; TEMPERATURES ; MAGNESIUM ; ELECTROLYTES ; 25-DEGREES-C ; DISSOLUTION ; CARBONATION
收录类别	SCI
原文出处	://WOS:000337337000046
语种	英语
WOS记录号	WOS:000337337000046
公开日期	2014-08-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11023]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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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