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Xanthophyll extraction process

An extraction process, lutein technology, applied in the preparation of organic compounds, organic chemistry, chemical instruments and methods, etc., can solve the problem of no extraction of lutein, shorten the extraction time, reduce the one-time investment of equipment, The effect of easy operation

Inactive Publication Date: 2009-04-08
FENCHEM BIOTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So so far, no reports and patents have been found to extract lutein by ultrasonic waves.

Method used

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  • Xanthophyll extraction process
  • Xanthophyll extraction process
  • Xanthophyll extraction process

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 1 kg of marigold flower, dry, pulverize, add 20L n-hexane / acetone / methanol (volume ratio is 8:1:1), at 20°C, ultrasonic power 100W, ultrasonic extraction for 20 minutes. Take it out, put it into a centrifuge, and spin and centrifuge at 5000r / min to obtain a clarified lutein supernatant. Add 2 times its volume of 20% (mass concentration) potassium hydroxide ethanol solution to the supernatant, and control the temperature at 50-70° C. to carry out saponification reaction for 30-50 minutes. After the saponification reaction is complete, let stand and cool. The reaction product was fully washed with deionized water until the lutein was crystallized and neutral, and centrifuged to obtain crude lutein crystals. Crude lutein crystals were dissolved in 150 ml of tetrahydrofuran, and 250 ml of deionized water was added for recrystallization. The recrystallized lutein crystals were washed with deionized water and ethanol, and dried to obtain 3.58 grams of finished lutein c...

Embodiment 2

[0023] Take 1 kg of marigold flowers, dry, crush, add 40L n-hexane / acetone / methanol (8:1:1 volume ratio), and extract by ultrasonic wave for 30 minutes at 30°C with ultrasonic power of 300W. Take it out, put it into a centrifuge, and spin and centrifuge at 5000r / min to obtain a clarified lutein supernatant. Add 20% (mass concentration) potassium hydroxide ethanol solution twice the volume of the supernatant to the supernatant, and control the temperature at 50-70° C. for saponification for 30-50 minutes. After the saponification reaction is complete, let stand and cool. The reaction product was fully washed with deionized water until the lutein was crystallized and neutral, and centrifuged to obtain crude lutein crystals. Crude lutein crystals were dissolved in 150 ml of tetrahydrofuran, and 250 ml of deionized water was added for recrystallization. The recrystallized lutein crystals were washed with deionized water and ethanol, and dried to obtain 3.68 g of finished lutein ...

Embodiment 3

[0025] Take 1 kg of marigold flower, dry, pulverize, add 20L n-hexane / acetone / methanol (volume ratio is 8:1:1), at 40°C, ultrasonic power 300W, ultrasonic extraction for 30 minutes. Take it out, put it into a centrifuge, and spin and centrifuge at 5000r / min to obtain a clarified lutein supernatant. Add 20% (mass concentration) potassium hydroxide ethanol solution twice the volume of the supernatant to the supernatant, and control the temperature at 50-70° C. for saponification for 30-50 minutes. After the saponification reaction is complete, let stand and cool. The reaction product was fully washed with deionized water until the lutein was crystallized and neutral, and centrifuged to obtain crude lutein crystals. Crude lutein crystals were dissolved in 150 ml of tetrahydrofuran, and 250 ml of deionized water was added for recrystallization. The recrystallized lutein crystals were washed with deionized water and ethanol, and dried to obtain 3.66 grams of finished lutein cryst...

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Abstract

The invention provides a technology for extracting lutein, which comprises the following steps: adding organic extraction solvent into crushed marigold flowers, putting the mixture in an ultrasonic extracting kettle for ultrasonic extraction, filtering extracting solution to recycle the filtrate containing lutein ester; adding 2 times filtrate volume of aqueous alkali into the filtrate obtained in the last step, and carrying out saponification reaction on the lutein ester in the filtrate at a temperature of between 50 and 70 DEG C; washing the reaction product subjected to the saponification reaction by deionized water until the lutein is crystallized, and carrying out centrifugalization on the solvent containing lutein crystal to obtain a crude product of the lutein crystal; recrystalizing the crude product of the lutein crystal; washing and drying the lutein crystal obtained by recrystalization to obtain a finished product of the lutein crystal. The method for extracting the lutein by ultrasonic can accelerate the lutein to enter the solvent by strong vibration generated by ultrasonic, high acceleration, strong cavitation effect, stirring action and the like, thereby increasing the extraction yield of effective components, and shortening time of extraction.

Description

1. Technical field [0001] The invention belongs to the extraction method of natural pigments, in particular to the extraction process of lutein. 2. Background technology [0002] Prior art: Lutein, also known as "plant lutein", belongs to "carotenoid" substances. It is an important component of plant pigments such as corn, vegetables, fruits, and flowers. It is widely found in spinach, Among plants such as cabbage, peach, mango, papaya, banana, potato, chrysanthemum, and calendula, the content of marigold is relatively high, which is the main source of raw materials for lutein extraction. The molecular formula of lutein is C 40 h 56 o 2 , the molecular weight is 568.85. Free lutein is extremely unstable to heat, light and oxygen. [0003] Lutein exists in a variety of plants and plays a protective role in plant photosynthesis. As early as the mid-1980s, western medical researchers discovered that natural lutein contained in plants is an excellent antioxidant . A large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C403/24
CPCC07C403/24C07C2101/16C07C2601/16
Inventor 刘娟范淑峰
Owner FENCHEM BIOTEK
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