Journal
JOURNAL OF OLEO SCIENCE
Volume 68, Issue 11, Pages 1125-1132Publisher
JAPAN OIL CHEMISTS SOC
DOI: 10.5650/jos.ess19165
Keywords
monolaurin; enzymatic transesterification; binary solvent system; continuous process; Lipozyme 435
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Funding
- National Key R&D Program of China [2017YFB0308701]
- National Natural Science Foundation of China [21676003]
- Beijing Municipal Science and Technology Project [D17110500190000]
- Science and Technology Program Key Project of the Beijing Municipal Commission of Education [KZ201510011010]
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This study aimed to investigate the highly selective production of monolaurin via enzymatic transesterification of methyl laurate and glycerol. It was determined that a binary solvent system (tert-butanol/iso-propanol, 20:80, wt./wt.) was suitable for the enzymatic production of monolaurin, especially in the continuous process. The highest mass fraction of monolaurin in the product mixture (80.8 wt.%) was achieved in a batch mode under the following conditions: a methyl laurate-to-glycerol molar ratio of 1:6, a substrate concentration (methyl laurate in the binary solvent) of 15 wt.%, an enzyme dosage of 6 wt.% of the amount of methyl laurate, and a reaction time of 1.5 h at 50 degrees C. Compared with the results under the batch conditions, a slightly higher yield of monolaurin (82.5 +/- 2.5 wt.%) was obtained in a continuous flow system at a flow rate of 0.1 mL/min, while the mass fraction of dilaurin in the product mixture was only 0.7 +/- 0.6 wt.%. In addition, the yield of monolaurin remained almost unchanged during the 18 tested days of the continuous experiment.
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