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KMID : 1024520080170030351
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Journal of the Environmental Sciences
2008 Volume.17 No. 3 p.351 ~ p.357
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Synthesis of Highly Pure 1,4-Sorbitan for Preparation of Anti-Fogging Agent
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Yu Hwa-Yeal
Moon Bu-Hyun
Ju Chang-Sik
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Abstract
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In order to develope an efficient way for the synthesis of highly pure 1,4-sorbitan solution from sorbitol, some experimental studies were performed. The reaction showed first order reaction with activation energy of 118.3 KJ/mol. Color of the product solutions changed to brown with reaction temperature and reaction time. The equilibrium contents of 1,4-sorbitan increased with decrease in reaction pressure, but the content of major impurity, sorbide, showed maximum about 550 torr vacuum with catalyst. The reasonable catalyst configuration was 0.26 wt% PTSA and 1 wt% and optimum reaction temperature and pressure range was and torr vacuum, respectively. At optimum reaction conditions, we could obtain white product solutions of highly pure 1,4-sorbitan with sorbide less than 10 wt%. This white product solution is advantageous for preparation of high quality span, anti-fogging agent.
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KEYWORD
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1,4-Sorbitan, Anti-fogging agent, Sorbitol, Span
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