六氨氯化镁初级成核研究
CIESC Journal
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赵建海;汪瑾;宋兴福;于建国
华东理工大学资源与环境工程学院,上海 200237
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Primary nucleation of magnesium chloride hexammoniate
ZHAO Jianhai;WANG Jin;SONG Xingfu;YU Jianguo
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Abstract: Production of anhydrous magnesium chloride by dehydration of bischofite is one of the best ways to utilize the magnesium resource of salt lakes. Formation of magnesium chloride hexammoniate (MgCl28226;6NH3) is the critical step of the coupled reaction crystallization process, which is an attractive dehydration process. Primary nucleation of MgCl28226;6NH3 by reaction crystallization process was performed in this research. The induction period of MgCl28226;6NH3 primary nucleation was measured by the laser method, and classical theory of primary nucleation was used to quantify the nucleation process. When supersaturation ratio (S=C/C*)S>2,homogeneous nucleation occurred; when S<2,heterogeneous nucleation occurred.The relationships among critical free energy of nucleation,critical size of nucleus and supersaturation was obtained.Critical free energy and critical size of nucleus decreased with increasing supersaturation.
赵建海;汪瑾;宋兴福;于建国.
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