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KMID : 0613820040140020269
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Journal of Life Science
2004 Volume.14 No. 2 p.269 ~ p.274
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Esterification Reaction of Soybean Oil by Heterogeneous Catalysts
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Shin Yong-Seop
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Abstract
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Using heterogeneous catalyst, esterification reaction of soybean oil (SBO) with methanol was investigated. Distributions of components in mixtures of soybean oil and methanol were measured at temperatures ranging from 40 to 65℃. Glycerine contents of reaction mixtures were measured for the different kinds of catalysts, such as NaOH, CaO, Ca(OH)2, MgO, Mg(OH)2, and Ba(OH)2. Based on the measured glycerine concentrations, conversions of the reaction mixtures were calculated. The effects of dose of catalyst, cosolvent and reaction temperature on final conversion were examined. Solubility of methanol in soybean oil was substantially greater than that of soybean oil in methanol. When the esterification reaction of soybean oil was catalyzed by heterogeneous catalyst, final conversion was strongly dependent on the alkalinity of the heterogeneous catalyst, and increased with the alkalinity of the catalyst material. Hydroxides from the alkali metals were more effective than oxides, which actually had no catalytic effects. When Ca(OH)2 was used for the esterification catalyst, maximum value of final conversion was measured at dose of 4%. The final conversion and reaction rate increased with reaction temperature, and showed substantial increment at reaction temperature of 50℃. When cosolvent, CHCl3, was added into the reaction mixture of soybean oil which catalyzed by Ba(OH)2, maximum value of final conversion was appeared at dos of 3%.
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KEYWORD
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soybean oil, esterification, heterogeneous catalyst, solubility, cosolvent, conversion
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