Journal
JOURNAL OF OLEO SCIENCE
Volume 71, Issue 7, Pages 1013-1020Publisher
JAPAN OIL CHEMISTS SOC
DOI: 10.5650/jos.ess21312
Keywords
?-glycerol monolaurate; transesterification; lipozyme TL IM; deprotection; amberlyst-15
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Funding
- Ministry of Education, Culture, Research and Technology of Indonesia [249/UN15.19/SP2H/LT/2021]
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This study successfully synthesized ??-Glycerol Monolaurate through a two-step reaction. The reaction showed high yield and purity, making it suitable for industrial production.
This study aimed to synthesize ??-Glycerol Monolaurate from protected glycerol (glycerol 1,2-acetonide) using Lipozym TL IM as a catalyst. In the first step, transesterification of methyl laurate and glycerol 1,2-acetonide with Lipozyme TL IM produced 1,2-acetonide-3-lauryl glycerol. In the second step, deprotection of 1,2-acetonide-3-lauryl glycerol with Amberlyst-15 produced ??-Glycerol Monolaurate. Furthermore, the optimum yield (82.1%) of 1,2-acetonide-3-lauryl glycerol (light yellow liquid, purity of 92%) was achieved at a reactant mole ratio of 1, n-hexane (4 mL) with a reaction time of 12 hours, and total Lipozyme TL IM of 5% (w/w of the total weight of reactants) at a temperature of 35??C. Deprotection of 1,2-acetonide-3-lauryl glycerol with Amberlyst-15 was conducted at room temperature for 24 hours. At a melting point of 62.8??C, and purity of 100% ??-Glycerol Monolaurate in the form of a white solid was obtained with a yield of 74.6% after the recrystallization of the crude product. This ??-glycerol monolaurate synthesis reaction pathway can be referred to as a green ??-monoacylglyceride synthesis method.
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