Method for preparing lutein water-soluble dry powder

Abstract

The invention discloses a preparation method of food-grade lutein water-soluble dry powder. The content of the all-trans isomer of the active ingredient in the product obtained by the existing method is low, and the structure is amorphous, which affects the coloring effect or bioavailability of the product. The steps of the present invention are as follows: after mixing lutein crystals with a low-boiling, volatile organic solvent with high solubility to lutein crystals, heating and dissolving to obtain an oil phase; mixing denatured starch with water, heating and dissolving, and cooling to obtain an aqueous phase ; The oil phase is slowly added to the water phase under stirring to obtain an emulsified mixed solution; the emulsified mixed solution is uniformed through a high-pressure homogenizer, so that the particle size of the emulsion reaches the nanometer level; the organic matter in the emulsion system is removed by conventional separation methods Solvent; use spray drying method or spray-starch fluidized bed drying method to remove water in the emulsion to obtain dry powder. The invention greatly increases the all-trans content of the active ingredients in the final product, is all amorphous, and has good coloring and nutritional strengthening effects.

Description

technical field [0001] The invention relates to an edible natural pigment, in particular to a method for preparing food-grade water-soluble dry powder of lutein extracted from marigolds. Background technique [0002] Lutein, also known as "plant lutein", is a natural pigment widely found in vegetables, flowers, fruits and some organisms. It belongs to carotenoids, and its molecular formula is C 40 h 56 o 2 , with a molecular weight of 568.85, is a natural antioxidant, colorant and nutritional supplement with excellent performance. Modern medical research has confirmed that a certain amount of lutein can resist cell and organ aging caused by free radicals, thereby preventing diseases such as cardiovascular disease, tumors, vision loss and blindness caused by organ aging. In addition, in recent years, it has also been confirmed that lutein is related to the "age-induced macular degeneration (ARMD)" disease in humans. Lutein and its isomer zeaxanthin are the only two caroten...

AI Technical Summary

Problems solved by technology

Transient high-temperature and high-pressure equipment is used in this process, which is difficult to operate in production, and the solvent used has a high boiling point, resulting in only 50% of the all-trans isomer content of the active compound in the lutein water dispersion system in the final product, which affects product biological activity

[0006] CN1,125,145C relates to a preparation method of lutein stable water dispersion and stable water-dispersible dry powder, the protective colloid used in the method is sodium caseinate or casein, but as CN1,101,425C As mentioned in , a solvent with a higher boiling point such as isopropanol is used in the process, and the maximum temperature of the process reaches 240 ° C, resulting in the content of all-trans isomers of the active ingredients in the final product being about 50%, which is very important for the leaf It is far from enough to increase the biological activity of flavins when they are used in food additives or food fortification or drugs, and high-pressure equipment is used in the process

[0007] In short, the preparation methods of lutein water-soluble preparations disclosed by the above-mentioned known technologies require relatively high operating conditions, and industrial production is difficult; the lutein crystals are not well embedded and protected, and the stability of the product is not good. ;The content of the all-trans isomer of the active ingredient in the final product is low, generally around 50%, with an amorphous structure, which affects the coloring effect or bioavailability of the product

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