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题名: Processes of the Phase Changes for LiCl, CaCl2 and NaCl-CaCl2 AqueousSolutions at the Subzero-Temperature with X-ray Diffraction Method
作者: Li Qing-Hai ;  He Li ;  Yao Yan ;  Zhu Dong-Hai ;  李冰 ;  李武
刊名: CHINESE JOURNAL OF INORGANIC CHEMISTRY
出版日期: 2010
卷号: 26, 期号:10, 页码:1804-1809
英文摘要: The X-ray powder diffraction patterns of the solids of CaCl2-H2O, NaCl-CaCl2-H2O systems at different temperature (the temperature of each system was quickly lowered from 5 similar to-80 degrees C) were determined. For the CaCl2-H2O system, with the decrease of the temperature, ice or CaCl2 center dot 6H(2)O was precipitated at the temperature range of -10 similar to-60 degrees C. For the LiCl-H2O system, ice or LiCl center dot H2O was obtained as the solid phase at the temperature range of 5 similar to-80 degrees C. For CaCl2-NaCl-H2O system, CaCl2 center dot 6H(2)O or NaCl ice was precipitated at the temperature range of 5 similar to-40 degrees C. The XRD results of the CaCl2-H2O, LiCl-H2O and NaCl-CaCl2-H2O systems are consistent with the outcomes of the corresponding phase diagrams. According to the experimental results, we might deduce that the anhydrous salts were formed firstly, and the hydrated solids were obtained with the extension of the equilibrium time. This study provides a reliable method for determining the solid phases of the brine or oilfield water systems. The X-ray powder diffraction patterns of the solids of CaCl2-H2O, NaCl-CaCl2-H2O systems at different temperature (the temperature of each system was quickly lowered from 5 similar to-80 degrees C) were determined. For the CaCl2-H2O system, with the decrease of the temperature, ice or CaCl2 center dot 6H(2)O was precipitated at the temperature range of -10 similar to-60 degrees C. For the LiCl-H2O system, ice or LiCl center dot H2O was obtained as the solid phase at the temperature range of 5 similar to-80 degrees C. For CaCl2-NaCl-H2O system, CaCl2 center dot 6H(2)O or NaCl ice was precipitated at the temperature range of 5 similar to-40 degrees C. The XRD results of the CaCl2-H2O, LiCl-H2O and NaCl-CaCl2-H2O systems are consistent with the outcomes of the corresponding phase diagrams. According to the experimental results, we might deduce that the anhydrous salts were formed firstly, and the hydrated solids were obtained with the extension of the equilibrium time. This study provides a reliable method for determining the solid phases of the brine or oilfield water systems.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.isl.ac.cn/handle/363002/1897
Appears in Collections:青海盐湖研究所知识仓储(2014年之前)_期刊论文

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Recommended Citation:
Li Qing-Hai,He Li,Yao Yan,et al. Processes of the Phase Changes for LiCl, CaCl2 and NaCl-CaCl2 AqueousSolutions at the Subzero-Temperature with X-ray Diffraction Method[J]. CHINESE JOURNAL OF INORGANIC CHEMISTRY,2010,26(10):1804-1809.
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