Preparation method for extracting phytosterol and sterol ester from pulp tall oil pitch

Abstract

The invention relates to extracting phytosterol from pulp floating oil pitch and a preparation method of sterol ester, which comprises the following steps of: 1, obtaining black liquor by a paper making process, separating insoluble materials, performing evaporation and concentrating, filtering, extracting and then extracting an upper liquid layer to obtain a black soap layer; 2, preparing an H3PO4 solution, adding black soap liquor prepared in the step1 under the stirring action, introducing the hot air into the H3PO4 solution in a reaction process; washing the obtained useful material in air with hot water, and performing precipitation to obtain the prepared crude plant floating oil; performing reduced pressure distillation to obtain floating oil pitch; 3, purifying the floating oil pitch; 4, adding 3-methyl-1,3-butanediol, 1,4-butanediol, potassium hydroxide, calcium hydroxide and lithium hydroxide into the floating oil pitch obtained in the step 3, reacting to remove excess solvents to obtain a mixture; 5, adding trimethylpentane and dioxane into the mixture obtained in the step 4, separating, and then adding pyridine into the mixture for crystallization so as to obtain phytosterol, and thus obtaining the plant sterol ester under the action of enzyme catalysis.

Description

technical field [0001] The invention relates to a preparation method of vegetable oil, in particular to a preparation method of phytosterol ester. Background technique [0002] Phytosterols are a class of biologically active natural compounds that widely exist in roots, stems, leaves and seeds of plants. They are one of the components that form cell membranes in plants and are also precursors for the biosynthesis of various hormones and steroids. Phytosterols have been widely used in medicine, cosmetics, food (including aviation food), feed and other fields. A large number of animal experiments and human clinical trial data show that phytosterols and esters have significant significance in reducing blood cholesterol levels and reducing the occurrence of cardiovascular diseases, and are important pharmaceutical raw materials and health food ingredients. [0003] Phytosterol esters are derivatives of phytosterols. They have the same or even better physiological activity than ...

AI Technical Summary

Problems solved by technology

Though this method consumes little solvent, the sterol recovery rate is low, only 35~40% of theoretical amount

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