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Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems
Alternative TitleJ. Univ. Sci. Technol. Beijing
Wang, XD; Cui, JL; Ge, XL; Zheng, SL; Zhang, M; Zhang, Y
2004-12-01
Source PublicationJOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
ISSN1005-8850
Volume11Issue:6Pages:500-504
AbstractPhase diagrams of complex multi-component aqueous chromium salt system are the important theoretical bases for increasing the recovery ratio of chromium and reducing the poisonous waste in the chromate production process. Phase equilibrium of multi-component system has been calculated from the limited known data with thermodynamic models. The phase equilibriums of KOH-K2CrO4-H2O, KOH-KAlO2-H2O, NaOH-Na2CrO4-H2O and NaOH-NaAlO2-H2O systems were calculated with thermodynamic models. The solubilities of Cr and Al was measured in the systems at different temperatures. The results were compared with experimental data and they are consistent with each other. It shows that the lower concentration of KOH (or NaOH) is favorable for the crystallization of KAlO2 (or NaAlO2) and higher concentration of KOH (or NaOH) is favorable for the crystallization of K2CrO4 (or NaAlO2) with controlling the KOH concentration in (NaPOO. Therefore, K2CrO4 (or Na2CrO4) can be separated from KAlO2 ) solutions of KOH-K2CrO4-KAlO2-H2O or NaOH-Na2CrO4-NaAlO2-H2O systems.; Phase diagrams of complex multi-component aqueous chromium salt system are the important theoretical bases for increasing the recovery ratio of chromium and reducing the poisonous waste in the chromate production process. Phase equilibrium of multi-component system has been calculated from the limited known data with thermodynamic models. The phase equilibriums of KOH-K2CrO4-H2O, KOH-KAlO2-H2O, NaOH-Na2CrO4-H2O and NaOH-NaAlO2-H2O systems were calculated with thermodynamic models. The solubilities of Cr and Al was measured in the systems at different temperatures. The results were compared with experimental data and they are consistent with each other. It shows that the lower concentration of KOH (or NaOH) is favorable for the crystallization of KAlO2 (or NaAlO2) and higher concentration of KOH (or NaOH) is favorable for the crystallization of K2CrO4 (or NaAlO2) with controlling the KOH concentration in (NaPOO. Therefore, K2CrO4 (or Na2CrO4) can be separated from KAlO2 ) solutions of KOH-K2CrO4-KAlO2-H2O or NaOH-Na2CrO4-NaAlO2-H2O systems.
KeywordPhase Diagram Chromate Chromite Solubility
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS IDWOS:000225523400005
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5034
Collection研究所(批量导入)
Affiliation1.Univ Sci & Technol Beijing, Met & Ecol Engn Sch, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, XD,Cui, JL,Ge, XL,et al. Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems[J]. JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING,2004,11(6):500-504.
APA Wang, XD,Cui, JL,Ge, XL,Zheng, SL,Zhang, M,&Zhang, Y.(2004).Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems.JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING,11(6),500-504.
MLA Wang, XD,et al."Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems".JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING 11.6(2004):500-504.
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