Effects of sweating time and cooling strategy on purification of N-vinyl-2-pyrrolidinone using a melt crystallizer

Sun Hyung Kim; Myoung Do Seo; Moon Seon Tak; Woo Sik Kim; Dae Ryook Yang; Jeong Won Kang

Korean Journal of Chemical Engineering, Vol.30, No.11, 1997-2000, November, 2013

DOI10.1007/s11814-013-0158-9 Export Citation

Effects of sweating time and cooling strategy on purification of N-vinyl-2-pyrrolidinone using a melt crystallizer

Sun Hyung Kim, Myoung Do Seo, Moon Seon Tak, Woo Sik Kim¹, Dae Ryook Yang , and Jeong Won Kang^†

Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Korea
¹Department of Chemical Engineering, Kyung Hee University, Suwon 449-701, Korea

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A melt crystallization process is proposed to produce high-purity n-vinyl-2-pyrrolidinone (NVP). To produce high purity products, operation strategy plays key role in the melt crystallizer. We investigated the cooling strategy and optimal sweating time using a batch-type melt crystallizer. A slow cooling followed by a slow heating was found to be an effective temperature profile to produce high purity of NVP. The optimal sweating time was found to be about 20 minutes. For industrial application, a cascade melt crystallizer which consists of four stages was constructed and the proposed crystallization/sweating scheme was applied. Using the new melt crystallizer, NVP more than 99.99% purity can be produced in semi-continuous mode.

Keywords:N-vinyl-2-pyrrolidinone;Melt Crystallization;Sweating;Cooling Strategy;Cascade Melt Crystallizer

[References]

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Matsuoka M, Fukuda T, Takagi Y, Takiyama H, J. Cryst.Growth., 166, 1035 (1996)
Kim KJ, Ulrich J, J. Cryst. Growth, 234(2-3), 551 (2002)
Jancic SJ, Sulzer Technical Review, Sulzer Brothers Limited, Winterthur, Switzerland (1986)
Papp A, Saxer K, Verfahrenstechnik., 15, 195 (1981)
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[Related Articles]

[1] Harreus AL, 2-Pyrrolidone, In: Gerhartz W, Yamamoto YS, Ullmann’s Encyclopedia of Chemical Technology, 5th Ed., Deerfield Beach, FL, VCH Publishers (1993)

[2] Chowdhury J, Chem. Eng., 24 (1988)

[3] Genck WJ, Chem. Process., 63 (1988)

[4] McCallion J, Chem. Process., 33 (1989)

[5] Rittner S, Steiner R, Chem. Ing. Technol., 57, 91 (1985)

[6] Wynn N, Chem. Eng., 26 (1986)

[7] Gilbert SW, AIChE J., 37, 1205 (1991)

[8] Kim KJ, Ulrich J, J. Colloid Interface Sci., 252(1), 161 (2002)

[9] Matsuoka M, Ohishi M, Kasama S, J. Chem. Eng. Japan., 19, 181 (1986)

[10] Matsuoka M, Fukuda T, Takagi Y, Takiyama H, J. Cryst.Growth., 166, 1035 (1996)

[11] Kim KJ, Ulrich J, J. Cryst. Growth, 234(2-3), 551 (2002)

[12] Jancic SJ, Sulzer Technical Review, Sulzer Brothers Limited, Winterthur, Switzerland (1986)

[13] Papp A, Saxer K, Verfahrenstechnik., 15, 195 (1981)

[14] Chem. Eng. Prog., 64 (1980)