Novel preparation method of fatty acid plant sterol esters

Abstract

The invention relates to a novel preparation method for efficiently synthesizing fatty acid plant sterol esters by using micelle catalysts. The used technical scheme of the invention comprises the following steps of: firstly adding a certain amount of fatty acid into a reaction bottle fitted with stirring, oil bath and temperature control functions, and inletting nitrogen gas and heating; then adding a certain amount of plant sterol esters and the micelle catalysts with 0.5-3.0 mol percent, regulating a reaction temperature to be 80-160 DEG C and reacting for 2-6 hours; and preparing the fatty acid plant sterol esters by separating and purifying. The method provided by the invention has the advantages of simple process, high efficiency and convenience for mass production.

Description

technical field [0001] The invention relates to a method for preparing fatty acid phytosterol esters, in particular to a solvent-free method for synthesizing fatty acid phytosterol esters with a micelle catalyst. Background technique [0002] Phytosterol is an active ingredient in plants, which widely exists in various vegetable oils, nuts and plant seeds, as well as plant foods and vegetables and fruits. Phytosterols have physiological effects such as reducing blood cholesterol levels, preventing prostate diseases, anti-inflammatory, anti-cancer and anti-oxidation. Phytosterols have been widely added to various foods as functional food additives. In September 2000, the U.S. Food and Drug Administration (FDA) approved that foods with added phytosterols and phytosterol esters can use the label "good for health". At present, countries such as the European Union, the United States and Japan have widely used it in foods such as butter, dairy products, chocolate, bread and marg...

AI Technical Summary

Problems solved by technology

[0003] Because most phytosterols exist in the form of crystals, there are the following problems in application: the crystalline form makes their solubility and bioavailability in the human body relatively poor; they are insoluble in water and have little solubility in oil , which greatly limits its application in food

The problem is that the catalytic efficiency of the enzyme is low and the dosage is large. To achieve an esterification rate of 60%, the required reaction time is 48h

The disadvantage of this method is that the conversion rate is not high, the amount of catalyst is large, and it takes 18 hours for a conversion rate of more than 95%.

[0010] WO0061694 discloses a method for preparing polyunsaturated acid phytosterol esters. The preparation process requires dichloromethane to dissolve phytosterols and fatty acids, so this method is not suitable for the food industry