Journal of Japan Oil Chemists' Society
Online ISSN : 1884-2003
Thermal Analysis of Crystallization of Monoacylglycerol from Ethanol Solution Containing Sorbitan Laurate
Yuichi NISHIDAFujio TAKAHASHI
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Volume 44 (1995) Issue 6 Pages 438-442

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Abstract

Calorific values of glyceryl monopalmitate (GMP) during crystallization from ethanol solution containing sorbitan laurate (SL) were determined with a differential scanning calorimeter (DSC). Molecular interactions between GMP and SL in erthanol are discussed. This parameter was taken as the enthalpy change (ΔH) in GMP crystallization. ΔH of GMP crystallization from 0.2 mol/kg of GMP in the absence and presence of SL (0.38 mol/kg) in ethanol was 74 and 62 kJ/mol, respectively. Crystallization temperature in the latter case decreased by about 9°C. The same conditions the apparent activation energy of GMP crystallization was determined from Avrami-Erofe'ev equation. It was found to decreased with increase in SL concentration in GMP solution in ethanol. This consistent with crystallization GMP from ethanol. The results are discussed in relation to findings presented in the previous paper.

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