Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems

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	Thermodynamic study of K2CrO4-KAlO2-KOH-H2O and Na2CrO4-NaAlO2-NaOH-H2O systems
	Wang, XD ; Cui, JL ; Ge, XL ; Zheng, SL ; Zhang, M ; Zhang, Y
刊名	JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
	2004-12-01
卷号	11 期号:6 页码:500-504
关键词	phase diagram chromate chromite solubility
ISSN号	1005-8850
其他题名	J. Univ. Sci. Technol. Beijing
中文摘要	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.
英文摘要	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.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
收录类别	SCI
原文出处	://WOS:000225523400005
语种	英语
WOS记录号	WOS:000225523400005
公开日期	2013-11-05
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/5034]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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.