Phytosterol and sterol ester preparing method

Abstract

The invention discloses a phytosterol and sterol ester preparing method. The preparing method includes the steps that vegetable oil deodorized distillate is used as a raw material and is heated and filtered to remove impurities; the reaction material and low-carbon monohydric alcohol are fully mixed and heated and pass through a cationic resin column; the low-carbon monohydric alcohol and water are removed in a pressure reduction mode; crystallization is carried out, and coarse solid phase plant phytosterol and a liquid phase substance are obtained through filtering and separating; secondary crystallization is carried out, and refined solid phase plant phytosterol is obtained through filtering and separating; the obtained solid phase plant phytosterol is dried to obtain phytosterol; phytosterol and fatty acid methyl ester are mixed and heated to 85 DEG C to be fully dissolved; a catalyst sodium methylate is put, the temperature is raised to 135-150 DEG C for pressure-reduction reaction; the reaction liquid is cooled to 80 DEG C and washed to be neutral; after washing, the reaction liquid is subjected to molecular distillation to obtain phytosterol. The preparing method has the advantages of being low in production cost, stable in process index and high in product yield.

Description

technical field [0001] The invention belongs to the technical field of food engineering, and relates to a method for preparing phytosterols and sterol esters, in particular to a method for extracting phytosterols from vegetable oil deodorized distillates and a method for preparing phytosterol esters. Background technique [0002] my country is the world's largest grain-producing country, and the north, as an important grain-producing area, provides the country with a large amount of high-quality grain and oil products. With the development of the oil industry and the improvement of people's living standards, people have generally accepted edible refined vegetable oil. Vegetable oil deodorization distillate is a mixture of fractions obtained during the refining process of corn, soybean, sunflower seeds and other plant seeds. It contains a large amount of valuable resources such as fatty acids, phytosterols, tocopherols and glycerides. Therefore, the comprehensive utilization...

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Problems solved by technology

Although the bio-enzyme-catalyzed synthesis method has mild reaction conditions, fewer side reactions, easy purification and separation, and relatively high product quality, the reaction time is long, the production efficiency is low, and the product cost is high, so it is not suitable for large-scale industrial production

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