Catalytic transesterification of corn oil and tristearin using immobilized lipases from Thermomyces lanuginosa |
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Authors: | Carlos F Torres Farida Munir C Otero Charles G Hill Jr |
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Affiliation: | (1) Department of Chemical Engineering, University of Wisconsin-Madisom, 1415 Engineering Dr., 53706 Madison, WI;(2) Departamento de Biocatalisis, Instituto de Catalisis y Petroleoquimica, CSIC, Campus Universitario Cantoblanco, 28049 Madrid, Spain |
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Abstract: | Thermomyces lanuginosa lipase was employed to catalyze the interesterification reaction between corn oil and tristearin at 45°C in a solvent-free
system. HPLC and GC analyses were used to monitor both the distribution of TAG and the concentrations of MAG, DAG, and TAG
as the reaction progressed. The positional distribution of the FA residues in the interesterified product was also determined
for comparison to that of the original corn oil. Two different weight ratios of corn oil to tristearin were studied. Addition
of molecular sieves to the reaction medium reduced the percentage of hydrolysis from 15 to 7. In order to improve the results
obtained with Lipozyme TL IM, an immobilization of T. lanuginosa lipase was carried out. At a solids loading of 10% (w/w), the new immobilized lipase reduced the concentration of tristearin
from 6 to 0.5% in only 30 min. |
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Keywords: | Interesterification lipase lipozyme TL IM margarine structured lipids |
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