naa a22 4500 510821731 CHVBK 20180411083536.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11814-013-0158-9 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0158-9 Effects of sweating time and cooling strategy on purification of N-vinyl-2-pyrrolidinone using a melt crystallizer [Elektronische Daten] [Sun Kim, Myoung Seo, Moon Tak, Woo Kim, Dae Yang, Jeong Kang] 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. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 N-vinyl-2-pyrrolidinone nationallicence Melt Crystallization nationallicence Sweating nationallicence Cooling Strategy nationallicence Cascade Melt Crystallizer nationallicence Kim Sun Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut Seo Myoung Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut Tak Moon Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut Kim Woo Department of Chemical Engineering, Kyung Hee University, 449-701, Suwon, Korea aut Yang Dae Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut Kang Jeong Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/11(2013-11-01), 1997-2000 0256-1115 30:11<1997 2013 30 11814 https://doi.org/10.1007/s11814-013-0158-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0158-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Sun Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut NATIONALLICENCE 700 1- Seo Myoung Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut NATIONALLICENCE 700 1- Tak Moon Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Woo Department of Chemical Engineering, Kyung Hee University, 449-701, Suwon, Korea aut NATIONALLICENCE 700 1- Yang Dae Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut NATIONALLICENCE 700 1- Kang Jeong Department of Chemical and Biological Engineering, Korea University, 136-701, Seoul, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/11(2013-11-01), 1997-2000 0256-1115 30:11<1997 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer