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

Authors
Kim, Sun HyungDo Seo, MyoungTak, Moon SeonKim, Woo SikYang, Dae RyukKang, Jeong Won
Issue Date
11월-2013
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Keywords
N-vinyl-2-pyrrolidinone; Melt Crystallization; Sweating; Cooling Strategy; Cascade Melt Crystallizer
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.30, no.11, pp.1997 - 2000
Indexed
SCIE
SCOPUS
KCI
Journal Title
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume
30
Number
11
Start Page
1997
End Page
2000
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101672
DOI
10.1007/s11814-013-0158-9
ISSN
0256-1115
Abstract
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.
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College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles

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Kang, Jeong Won
공과대학 (화공생명공학과)
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