Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions

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	Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions
	You, Shaowei 1,3; Zhang, Yifei 1,2; Cao, Shaotao 1; Chen, Fangfang 1; Zhang, Yi 1
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2012-06-06
卷号	51 期号:22 页码:7736-7741
关键词	continuous msmpr crystallizer product removal crystallizer bayer liquors gibbsite precipitation al(oh)(3) crystals agglomeration growth nucleation morphology mechanism
ISSN号	0888-5885
其他题名	Ind. Eng. Chem. Res.
中文摘要	The nucleation, growth, and agglomeration of monosodium aluminate hydrate (MAH) crystallization in concentrated sodium aluminate solutions were investigated in a steady-state mixed-suspension-mixed-product-removal (MSMPR) crystallizer, and the mechanism was analyzed in detail. The crystal growth was diffusion- and surface-integration-controlled, and the secondary nucleation, as a result of crystal-agitator and crystal-crystallizer collisions, was determined further. The agglomeration kernel, expressed in terms of mean residence time, growth rate, and suspension density, was found to have a positive order of about 0.52 in the suspension density, indicating that the agglomeration kernel increased at higher frequencies of collisions between particles. The growth rate of MAH was found to be higher than that of gibbsite in active NaAl(OH)(4)-NaHCO3 systems, but the nucleation rate of MAH was lower than that of gibbsite in seeded-hydrolysis processes.
英文摘要	The nucleation, growth, and agglomeration of monosodium aluminate hydrate (MAH) crystallization in concentrated sodium aluminate solutions were investigated in a steady-state mixed-suspension-mixed-product-removal (MSMPR) crystallizer, and the mechanism was analyzed in detail. The crystal growth was diffusion- and surface-integration-controlled, and the secondary nucleation, as a result of crystal-agitator and crystal-crystallizer collisions, was determined further. The agglomeration kernel, expressed in terms of mean residence time, growth rate, and suspension density, was found to have a positive order of about 0.52 in the suspension density, indicating that the agglomeration kernel increased at higher frequencies of collisions between particles. The growth rate of MAH was found to be higher than that of gibbsite in active NaAl(OH)(4)-NaHCO3 systems, but the nucleation rate of MAH was lower than that of gibbsite in seeded-hydrolysis processes.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	CONTINUOUS MSMPR CRYSTALLIZER ; PRODUCT REMOVAL CRYSTALLIZER ; BAYER LIQUORS ; GIBBSITE PRECIPITATION ; AL(OH)(3) CRYSTALS ; AGGLOMERATION ; GROWTH ; NUCLEATION ; MORPHOLOGY ; MECHANISM
收录类别	SCI
原文出处	://WOS:000304837500034
语种	英语
WOS记录号	WOS:000304837500034
公开日期	2013-11-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6294]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	You, Shaowei,Zhang, Yifei,Cao, Shaotao,et al. Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2012,51(22):7736-7741.
APA	You, Shaowei,Zhang, Yifei,Cao, Shaotao,Chen, Fangfang,&Zhang, Yi.(2012).Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,51(22),7736-7741.
MLA	You, Shaowei,et al."Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 51.22(2012):7736-7741.