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Process for preparing lutein crystic by drying flower of marigold

A technology for lutein and crystals, which is applied in the field of preparing high-purity lutein crystals, can solve the problems of large damage to lutein, affect product quality, complicated processes, etc., and achieves small damage and loss, reduced preparation cost, and simplified process. Effect

Inactive Publication Date: 2006-06-28
CHENGDU FENGLAN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the disclosed lutein production processes, the extraction process of lutein resin is relatively mature and has already been produced on a large scale. However, the early marigolds were fermented and granulated. Larger, which seriously affects the yield of lutein; the toxic solvents such as petroleum ether and n-hexane used at the same time have high residues, which not only affect the product quality, but also cause environmental impact, and greatly increase the cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1), extract 1 kg of marigold dried flowers (unfermented), crush it to about 20 mesh powder (all can pass 10-40 mesh); add KOH ethanol solution (KOH: ethanol = 467g: 5L), the saponification reaction was stirred at a temperature of 65-70°C for 3 hours; then vacuum distillation at 55°C (or heating to 78°C under normal pressure) to remove ethanol to obtain dry saponified crude extract .

[0013] 2), add 5 liters of water to the saponified crude extract, the water temperature is 20°C (the water temperature can be selected between 0-80°C), stir for about 30 minutes, fully neutralize with phosphoric acid to neutral (PH=7) . The filtered residue is dried at 50°C for 16 hours; then, add ethyl acetate 7 times the weight of the filtered residue to the dried residue, stir for 30 minutes, filter to remove the precipitate, and then remove the acetic acid by vacuum distillation ethyl ester to obtain crude lutein.

[0014] 3) Add 5 times the weight of deionized water to the above cr...

Embodiment 2

[0017] 1), extract 2 kg of marigold dried flowers (unfermented), crush it to about 20 mesh powder (all can pass 10-40 mesh); add KOH ethanol solution (KOH: ethanol = 1300g: 12L), stirring saponification reaction at a temperature of 65-70°C for 4 hours; then vacuum distillation at 55°C (or heating to 78°C under normal pressure) to remove ethanol, and dry saponified crude extract .

[0018] 2) Add 12 liters of water to the saponified crude extract at a temperature of 22°C, stir for about 30 minutes, and fully neutralize with hydrochloric acid to neutrality (PH=7). The filtered residue was dried at 60°C for 12 hours; then, 7-9 times the weight of ethyl acetate was added to the dried residue, stirred for 30 minutes, filtered to remove the precipitate, and then the acetic acid was removed by vacuum distillation ethyl ester to obtain crude lutein.

[0019] 3), adding 10 times the weight of deionized water to the above crude lutein each time, the temperature of the deionized water ...

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PUM

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Abstract

The invention discloses a method to make xanthin crystal from marigold dried flower. It includes the following steps: directly adding KOH.ethanol solution into the marigold dried flower smashed material to take saponifying process; adding water to the raw distilling material, neutralizing by acid material, filtering adding ethyl acetate, removing deposit, distilling raw xanthin; washing by deionized water to form xanthin raw crystal; finally, recrystallizing by tetrahydrofuran and deionized water, washing by deionized water and absolute ethyl alcohol, the xanthin crystal that has purity over 90% would be gained after vacuum drying. It is easy to operate, low cost, high extraction rate, etc.

Description

technical field [0001] The invention relates to a method for directly preparing high-purity lutein crystals from dried marigold flowers. Background technique [0002] Lutein, also known as "plant lutein", is a carotenoid that is widely found in flowers, grains, vegetables, fruits and certain vegetables. Because this natural pigment has the advantages of bright color, strong coloring power, safety, non-toxicity, and rich nutrition, it is more and more favored by people. In recent years, lutein has been widely used in food, medicine, cosmetics, and poultry feed. field. [0003] Studies have shown that eating foods rich in lutein, medicines and health products can prevent a series of diseases caused by organ aging, such as preventing vision loss and blindness caused by age-related macular degeneration, cardiovascular sclerosis, coronary heart disease and tumor diseases, etc. Adding lutein to livestock and poultry feed can improve the color and quality of new livestock and po...

Claims

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Application Information

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IPC IPC(8): C07C403/24
Inventor 李剑锋
Owner CHENGDU FENGLAN SCI & TECH
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