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http://dx.doi.org/10.12925/jkocs.2007.24.2.5

A Study on the Sweating Process for High Purification of p-Dioxanone  

Kim, Sung-Il (R&D center, Samchun Pure Chemical Ind. Co., LTD)
Chun, Suk-Keun (R&D center, Samchun Pure Chemical Ind. Co., LTD)
Park, Du-Goan (R&D center, Samchun Pure Chemical Ind. Co., LTD)
Park, Keun-Ho (Department of Chemical engineering, Chang Won National University)
Park, So-Jin (Department of Chemical and Engineering, Chung Nam National University)
Kim, Chul-Ung (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology)
Publication Information
Journal of the Korean Applied Science and Technology / v.24, no.2, 2007 , pp. 140-148 More about this Journal
Abstract
As an additional high purification method of p-dioxanone monomer for a high molecular weight polymer, the sweating operation of crystalline layer obtained by layered melt crystallization from p-dioxanone-diethylene glycol system was studied. Purity and yield of p-dioxanone crystal depended mainly on the sweating temperature and sweating time. Increasing sweating time and sweating temperature, the purity of p-dioxanone crystal increase, whereas the yield of that decrease, respectively. Through the optimization of sweating operation, p-dioxanone crystal can be upgraded to very high purity over 99.9 % suited to monomer for polymerization.
Keywords
Sweating; Melt Crystallization; Purification; p-Dioxanone; Inclusion Factor;
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