Production method for preparing high-purity lutein crystal from marigold extract

Abstract

The invention relates to the field of production technology researches of natural pigments and in particular relates to a production method for preparing a high-purity lutein crystal from marigold extract. The production method comprises the following steps: adding the marigold extract into a super-critical CO2 extraction tank; carrying out extraction and separation to obtain a raw solution I; adding the raw solution I into a saponification tank containing a saponification solution and stirring until saponification is completely finished, so as to obtain a saponified product I; adding the saponified product I into a stainless steel tank; firstly, adding softened water for washing; then leading a mixed solution into a centrifugal machine and carrying out various times of separation until noliquid is spun out; collecting to obtain a material II; putting the material II into the stainless steel tank and adding a certain amount of absolute ethyl alcohol; stirring until the material and the absolute ethyl alcohol are uniformly mixed, and stopping stirring; standing and recrystallizing at room temperature; leading a crystallized solution into the centrifugal machine and carrying out solid-liquid separation to obtain the lutein crystal; scrapping the lutein crystal into a stainless steel disc; after uniformly dispersing, putting the lutein crystal into a vacuum drying box and dryingto obtain a lutein crystal finished product. According to the production method provided by the invention, the conversion rate from lutein ester to free-state lutein can be effectively improved, and oxidization and isomerization of the free-state lutein are inhibited.

Description

technical field [0001] The invention relates to the research field of production technology of natural pigments, in particular to a production method for preparing high-purity lutein crystals from marigold extract. Background technique [0002] At present, lutein belongs to the tetraterpenoids of carotenoids, which widely exist in the flowers, leaves, fruits and some algal organisms of plants, especially in the petals of marigolds. Lutein has a strong antioxidant effect, which can remove free radicals produced by the human body's metabolic process, reduce tissue damage, and delay cell aging. , in the prevention of senile cataracts and age-related macular degeneration, etc. more and more attention. [0003] Lutein extracted from marigold petals usually exists in the form of lutein esters. To prepare lutein crystals, the fatty acids in lutein esters need to be removed by saponification, and the original content of marigold extract, saponification solution The composition, sa...

AI Technical Summary

Problems solved by technology

[0003] Lutein extracted from marigold petals usually exists in the form of lutein esters. To prepare lutein crystals, the fatty acids in lutein esters need to be removed by saponification, and the original content of marigold extract, saponification solution The composition, saponification temperature and saponification time are very important to the influence of lutein content in the product, which can easily lead to oxidation or isomerization of lutein, thus losing its physiological activity