The invention belongs to the technical field of functional
grease preparation, and discloses a preparation method and application of medium-chain and long-chain
fatty acid triglyceride. The preparation method comprises the following steps: taking mixed
vegetable oil; adding water and heating to obtain an oil-water mixture; filling the
immobilized lipase into a glass column with external circulating
water heating for preheating; injecting the oil-water mixture from the upper part of the
immobilized enzyme column to carry out
enzyme hydrolysis reaction; collecting a hydrolyzed oil crude product, and separating free
fatty acid; taking
medium chain triglyceride, mixing, and injecting into the
immobilized enzyme column for
esterification reaction; and removing reaction by-products to obtain the medium and
long chain fatty acid triglyceride rich in
omega-3 / 6 / 9 equilibrium proportion. The product prepared by the method contains medium-chain fatty acid and long-chain fatty acid at the same time, the proportion of different fatty acids is more balanced, the health requirement of a
human body on fatty acid intake is met, the
immobilized enzyme column technology is used in a
solvent-
free system, the steps of
lipase and
oil separation are simplified, the service life of
enzyme is remarkably prolonged, and the method is suitable for industrial production. The
energy consumption and
pollution emission are reduced, the production cost is reduced, and the modern industrial
green development concept is met.