Method for preparing high-purity lutein ester by using tagetes extract

Abstract

The invention relates to the field of food processing, and aims at providing a method for preparing high-purity lutein ester by using tagetes extract. The method has the advantages that the sources ofthe raw materials are wide, the production cost is low, and the solvent can be reutilized. The method comprises the following steps of adding the tagetes extract into a supercritical CO2 (carbon dioxide) extracting tank, extracting and purifying, so as to obtain high-purity tagetes extract I; guiding the high-purity tagetes extract I into a stainless steel tank, adding ethyl acetate of which themass is equal to 5 to 10 times of the mass of the high-purity tagetes extract I, fully mixing and stirring, stirring for 30 to 45min at the temperature of 30 to 45 DEG C, enabling a high-speed centrifuging machine to centrifuge, and collecting precipitate II; adding an absolute ethyl alcohol solution of which the mass is equal to 5 to 6 times of the mass of the precipitate II into the stainless steel tank, mixing with the precipitate II, fully mixing the mixture, enabling the high-speed centrifuging machine to centrifuge, and collecting precipitate III; scraping the precipitate III into a stainless steel tray, uniformly dispersing, placing into a vacuum drying box, and drying under the vacuum condition, so as to obtain the finished product of the high-purity lutein ester.

Description

technical field [0001] The invention relates to the technical fields of food additives and medicine, in particular to a production method for preparing high-purity lutein ester from marigold extract. Background technique [0002] Lutein is an oxygen-containing carotenoid, which widely exists in the flowers, leaves and fruits of plants, among which the petals of marigolds have the highest content of lutein. [0003] Studies in recent years have shown that free lutein has poor stability in vitro and is prone to oxidative degradation, while the stability of lutein in the form of lutein esters is significantly better than free lutein. The study also found that lutein esters are more easily absorbed by the human body. It can be converted into free lutein in the human body. Free lutein has the functions of anti-oxidation, eliminating free radicals, anti-cancer, and reducing the incidence of cardiovascular diseases. It is also one of the main components of macular pigment in the h...

AI Technical Summary

Problems solved by technology

However, the content of lutein esters in the marigold extract is relatively low, only accounting for 9-18%, and most of the rest are colloids, fatty acids, polysaccharides, etc., thereby greatly limiting the use of lutein esters in food, medicine, etc. Applications in high-end fields