Method for extracting lutein ester from marigold

Abstract

The invention discloses a method for extracting lutein ester from marigold. The method comprises the following steps: selecting a raw material, fermenting, pressing, grinding, pelleting, extracting, filtering, concentrating by using a reverse osmosis membrane, thin film evaporation, blending, and barreling and warehousing after passing the inspection. Isopropyl alcohol is used as a solvent for extracting the lutein ester without containing benzene, phenol and hydrocarbon substances, so that harms to human bodies are avoided and the residual amount of harmful substances is reduced; harmful residues can be discharged without gasification, so that the production time and the production cost are reduced greatly; by a reverse osmosis membrane concentration technology, a lutein ester extract is concentrated at room temperature, without heating; the reverse osmosis membrane concentration technology is good in technical and economic performance; by the reverse osmosis membrane concentration technology, the quality and the yield of the lutein ester are greatly improved.

Description

Technical field [0001] The invention relates to a method for extracting concentrated lutein ointment, in particular to a method for extracting lutein oil from dried marigold flower particles. Background technique [0002] Lutein is a carotenoid, its chemical name is 3,3'-dihydroxy-α-carotene, molecular formula C40H5602, molecular weight is 568.85, melting point is 190℃, insoluble in water and propylene glycol, easily soluble in oil and Ester solvents such as ethanol, acetone, and n-hexane have the chemical structure: [0003] [0004] It can be seen from its structure that the structural formula of lutein ester contains many unsaturated bonds. This structure makes its physical and chemical properties particularly unstable, especially to light, oxygen and temperature. It is usually stored in a cool and dry place. Light sealed. [0005] Since the discovery of lutein, people have continued to study its pharmacological activity and found that it is an excellent antioxidant, has anti-ca...

AI Technical Summary

Problems solved by technology

Therefore, a large amount of benzene, phenol and alkane substances remain in the lutein ester after leaching. These substances are harmful. In order to control the residue of these substances in the later stage, the evaporator will be added to prolong the evaporation time, which greatly increases the production cost.

Moreover, the concentration temperature is too high when using vacuum concentration equipment, and the concentration time is relatively long

The unique structure of lutein determines that lutein ester is very unstable, and it will decompose quickly under conditions such as temperature, light and oxygen, resulting in a large loss of products.

In addition, due to the use of conventional concentration equipment, there is a problem of low trans-lutein in lutein

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