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Study on Crystallization Process of Acenaphthene

Author: LiuPengBiao
Tutor: WeiHongYuan
School: Tianjin University
Course: Chemical Engineering
Keywords: Acenaphthene Cooling and crystallization Solubility Metastable zone Crystallization kinetics Particle size distribution Crystal analog
CLC: TQ241.52
Type: Master's thesis
Year: 2007
Downloads: 130
Quote: 3
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Abstract


The acenaphthene an organic synthetic material, widely used in plastics, dyes, pesticides, and other industries. Acenaphthene field of application is also expanding with the development of fine chemicals, which put forward higher requirements on the quality of the product. Cooling and crystallization process of acenaphthene refined separation process is simple, easy to industrial production, at the same time, can significantly improve product quality. Therefore, the cooling and crystallization process of acenaphthene more systematic study including crystallization thermodynamics, crystallization kinetics, the crystallization process and the crystallization process simulation four aspects. Crystallization thermodynamics determines the maximum yield of the crystallization process and the crystallization of the selection of the program. In this paper, the state-of-the-art laser Determination acenaphthene solubility in the A, B, n-butanol and toluene, and Apelblat solubility empirical equation fitting regression equation good agreement with the experimental data. Simultaneous determination the the acenaphthene A, B, and n-butanol supersolvus metastable zone of the system. The above data provide a theoretical basis for the crystallization process development, but also the control of the operating conditions on the crystallization process design, optimization and amplification of guiding significance. The relative size of the crystallization kinetics of nucleation and growth rate affect the particle size distribution of the product is the larger basis of the crystallization operation and the mold design. Acenaphthene crystallization process requirements, using the method of the intermittent dynamic law Moments transform acenaphthene cooling and crystallization kinetics study, the experimental data by the method of least squares multiple linear regression nucleation rate acenaphthene A solution The growth rate equation, and provide reliable experimental evidence and theoretical basis for process simulation and process to enlarge. On in Acenaphthene crystallization thermodynamics and kinetics of the foundation, based on the yield, particle size distribution, and electron microscopy photos indicators, cooling crystallization process of acenaphthene experimental optimization, effects of operating parameters (inputs of seed, stirring rate, cooling rate etc.) the influence of the particle size distribution of the crystallization process and the final product, and to determine the optimal process parameters of the the acenaphthene crystallization process experience. Moments transformation method to establish the mathematical model, combined with the crystal growth rate equation, into a simplified model of the nucleation rate equation, the solubility of the equation, cooling function for ordinary differential equations is solved using the Runge-Kutta method. Under this method to simulate the impact of different operating conditions of acenaphthene crystallization process, the simulation results of the process to enlarge the operation of the industrial production of important guiding significance.

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aromatic compounds > Aromatic hydrocarbons > Polycyclic aromatic hydrocarbons > Naphthalene, dihydronaphthalene , tetrahydronaphthalene
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