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primary nucleation of lithium carbonate

Frontiers of Chemical Science and Engineering 2009年第1期3卷 73-77页

作者： Yuzhu SUN Xingfu SONG Jin WANG Yan LUO Jianguo YU State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

A set of laser apparatus was used to explore the induction period and the primary nucleation of lithium *** show that the induction period increases with the decrease of supersaturation,temperature and stirring *** the classical theory of primary nucleation,many important properties involved in primary nucleation under different conditions were obtained quantitatively,including the interfacial tension between solid and liquid,contact angle,critical nucleus size,critical nuleation free energy etc.

关键词： lithium carbonate primary nucleation reac-tive crystallization induction period

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Determination of metastable zone and induction time of analgin for cooling crystallization

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Chinese Journal of Chemical Engineering 2017年第3期25卷 313-318页

作者： Ling Zhou Zhao Wang Meijing Zhang Mingxia Guo Shijie Xu Qiuxiang Yin School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Chemical Engineering Tianjin 300072China

The solubility, metastable zone width, and induction time of analgin for unseeded batch cooling crystallization in ethanol–aqueous system were experimentally determined. The solubility data could be well described by the van't Hoff equation model. The metastable zone width at various cooling rates was measured, and some parameters of nucleation kinetic were calculated using the Ny'vlt theory. Furthermore, the induction period of various temperatures and supersaturation ratios was also measured. According to classical nucleation theory, some nucleation parameters and interfacial energy was calculated through the induction time(t_(ind)) data. Homogeneous nucleation tended to occur when the supersaturation is high, whereas heterogeneous nucleation was more likely to occur when the supersaturation is low.

关键词： Analgin Cooling crystallization primary nucleation Metastable zone Induction time

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