Method for preparing high-purity acetylation soybean phospholipid under CO2 supercritical state

Abstract

The present invention provides a method for preparing high-purity acetylation soybean phospholipid under a CO2 supercritical state. According to the present invention, a transparent phospholipid is adopted as a raw material, and an acetylation method is selected to modify soybean phospholipid under a CO2 supercritical state to obtain high-purity acetylation soybean phospholipid; influence on an acetylation rate by an acetic anhydride amount, a reaction temperature, a reaction time, a reaction pH value and different acetylation conditions are researched; the CO2 supercritical fluid has advantages of low viscosity, large diffusion coefficient, high density, good solubility property and mass transfer property of the liquid and the gas, such that reaction efficiency can be improved in the field of high-purity soybean phospholipid refinement, phosphatidylcholine content increase is easily achieved, and substantial energy saving can be achieved, wherein the high-purity acetylation soybean phospholipid with an acetylation rate of 93.2% can be finally obtained, and the acetylation rate of the obtained high-purity acetylation soybean phospholipid prepared under the CO2 supercritical state is significantly higher than the acetylation rate of the high-purity acetylation soybean phospholipid prepared under the conventional condition.

Description

Technical field: [0001] The invention relates to the field of agricultural product processing, in particular to a 2 The method for preparing highly acetylated soybean lecithin in a supercritical state is applied to the preparation of highly acetylated soybean lecithin. Background technique: [0002] Soybean phospholipid concentrate is a light yellow or light brown translucent thick substance composed of phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylinositol (PI) and phosphatidic acid. Phospholipid is a natural surfactant with good performance. It has the functions of emulsifying, softening, wetting, dispersing, penetrating, solubilizing, reducing blood fat, protecting the liver, and beautifying. Because of its good physical and chemical properties and physiological functions, it has been Widely used in food, medicine, cosmetics and other aspects. When phospholipids and phospholipids are used as emulsifiers, their HLB value is around 4, and they can o...