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Crystallization Kinetics of Monosodium Aluminate Hydrate in Concentrated Sodium Aluminate Solutions
Alternative TitleInd. Eng. Chem. Res.
You, Shaowei1,3; Zhang, Yifei1,2; Cao, Shaotao1; Chen, Fangfang1; Zhang, Yi1
2012-06-06
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume51Issue:22Pages:7736-7741
AbstractThe 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.; 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.
KeywordContinuous Msmpr Crystallizer Product Removal Crystallizer Bayer Liquors Gibbsite Precipitation Al(Oh)(3) crystAls Agglomeration Growth Nucleation Morphology Mechanism
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie202622h
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCONTINUOUS MSMPR CRYSTALLIZER ; PRODUCT REMOVAL CRYSTALLIZER ; BAYER LIQUORS ; GIBBSITE PRECIPITATION ; AL(OH)(3) CRYSTALS ; AGGLOMERATION ; GROWTH ; NUCLEATION ; MORPHOLOGY ; MECHANISM
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000304837500034
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6294
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
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