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Preparation of sodium aluminate from the leach liquor of diasporic bauxite in concentrated NaOH solution
Cao, Shaotao1,2,3; Zhang, Yifei1,2; Zhang, Yi1,2; Zhang, YF
2009-09-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume98Issue:3-4Pages:298-303
AbstractA new process to produce monosodium aluminate hydrates (MAH) by fast crystallization from the leach liquor of a diasporic bauxite in concentrated NaOH solution is presented. The crystallization of MAH was carried out easily compared to the precipitation of gibbsite and the effect of agitation, initial concentration of sodium aluminate, seed amount and the presence of red mud were systematically studied in a batch crystallizer. The apparent kinetics of crystallization followed a second order rate law with an apparent activation energy for MAH crystallization of 38.0 kJ/mol which implies a surface-diffusion controlled mechanism. X-Ray diffraction and scanning electron microscopy identified the structure of MAH as Na(2)O center dot Al(2)O(3)center dot 2.5H(2)O with a flake crystal morphology. The molar ratio a of Na(2)O to Al(2)O(3) in the MAH products was < 1.2 after a simple wash by dilute sodium aluminate. (C) 2009 Elsevier B.V. All rights reserved.
KeywordBauxite Leaching Concentrated Naoh Monosodium Aluminates Hydrate Mah Crystallization
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2009.05.016
Indexed BySCI
Language英语
WOS KeywordGIBBSITE CRYSTALLIZATION ; PRECIPITATION ; AGGLOMERATION ; NUCLEATION ; INHIBITION ; MORPHOLOGY ; CRYSTALS ; GROWTH
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000268439800015
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6593
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorZhang, YF
Affiliation1.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, 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
Cao, Shaotao,Zhang, Yifei,Zhang, Yi,et al. Preparation of sodium aluminate from the leach liquor of diasporic bauxite in concentrated NaOH solution[J]. HYDROMETALLURGY,2009,98(3-4):298-303.
APA Cao, Shaotao,Zhang, Yifei,Zhang, Yi,&Zhang, YF.(2009).Preparation of sodium aluminate from the leach liquor of diasporic bauxite in concentrated NaOH solution.HYDROMETALLURGY,98(3-4),298-303.
MLA Cao, Shaotao,et al."Preparation of sodium aluminate from the leach liquor of diasporic bauxite in concentrated NaOH solution".HYDROMETALLURGY 98.3-4(2009):298-303.
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