[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.9713/kcer.2013.51.5.587

Studies of Solid-Liquid Phase Equilibria for Mixtures of N-vinyl-2-pyrrolidone+2-pyrrolidone and Growth Rate of N-vinyl-2-pyrrolidone Crystal Using Melt Crystallization

Kim, Sun Hyung (Department of Chemical and Biological Engineering, Korea University)
Seo, Myoung Do (Department of Chemical and Biological Engineering, Korea University)
Tak, Moon Seon (Department of Chemical and Biological Engineering, Korea University)
Kim, Woo Sik (Department of Chemical Engineering, Kyung Hee University)
Yang, Dae Ryuk (Department of Chemical and Biological Engineering, Korea University)
Kang, Jeong Won (Department of Chemical and Biological Engineering, Korea University)

Publication Information

Korean Chemical Engineering Research / v.51, no.5, 2013 , pp. 587-590 More about this Journal

Abstract

Solid-liquid equilibria for mixtures composed of n-vinyl-2-pyrrolidone (NVP) and 2-pyrrolidone were measured as a basic study for the melt crystallization process to remove 2-pyrrolidone as impurity included in NVP. A differential scanning calorimeter (DSC) and a crystallizer were used and the experimental results obtained from two methods were similar. The mixture showed a eutectic system which has a single composition at the minimum melting temperature. Calculation results from simple thermodynamic equations were found in general agreements with present data. To determine the growth rate of NVP crystal which is important for the design of crystallization process, thicknesses of the crystal were measured with the time using a layer melt crystallizer. The growth rates increased as cooling temperatures decreased. Heat transfer coefficient correlated from present data was found to successfully describe the crystal growth behavior.

Keywords

N-Vinyl-2-Pyrrolidone; 2-Pyrrolidone; Melt Crystallization; Solid-Liquid Equilibria; Crystal Growth Rate;

Citations & Related Records

Times Cited By KSCI : 1 (Citation Analysis)

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