Method for preparing astraxantbin using phytoxanthin extraction

A technology of lutein and astaxanthin, applied to zeaxanthin

Inactive Publication Date: 2006-09-13
董旭丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Workers at BASF have verified the conversion of β-carotene to canthaxanthin by an oxidation

Method used

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  • Method for preparing astraxantbin using phytoxanthin extraction
  • Method for preparing astraxantbin using phytoxanthin extraction
  • Method for preparing astraxantbin using phytoxanthin extraction

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] 1. Preparation of Lutein Crystals

[0040] Weigh 100 g of lutein extract (127 g of lutein / kg extract) into a 250 ml three-necked flask, add 100 ml of ethanol, and stir in a constant temperature water bath at 56°C. After the internal and external temperatures are balanced, 20 g of 45% KOH aqueous solution is slowly added. Saponification for three hours. The saponification rate detected by TLC is more than 95%.

[0041] After the saponification is complete, add 600 ml of warm water at 35°C and stir. Adjust the pH value between 5-7 with 25% acetic acid, centrifuge and filter, and discard the water phase. After washing three times with water, the color of the filtrate was clear. Centrifuge to obtain a lutein filter cake.

[0042] The filter cake was washed with 200 ml of n-hexane to remove sterols and fatty acids. Centrifuge to remove the n-hexane phase. The filter cake was vacuum dried. The lutein content reaches more than 80%.

[0043] Then wash the lutein ...

Example Embodiment

[0050] Example 2

[0051] One-step production of zeaxanthin with lutein extract as raw material

[0052] Weigh 150g dry lutein extract (130g lutein / kg extract) into the autoclave, add 150ml propylene glycol and 20ml nonylphenol polyoxyethylene ether, stir and mix evenly; then add 50g KOH to the reactor, And the reaction kettle is sealed and protected by nitrogen. Slowly raise the temperature to 100°C, and react at a constant temperature for 20 hours. During the reaction, uniform rotation and stirring (120RPM) were maintained. Sampling and analysis by high pressure liquid chromatography showed that the conversion rate reached more than 80%. Weigh 1.4g of 60% zeaxanthin in a 50ml glass reactor, add 20ml of chloroform, and stir evenly. Add sodium chlorate aqueous solution (0.3g / 10ml water) under ice bath. NaHCO 3 Adjust the pH value of the solution to pH=8. Then it was protected by nitrogen and reacted for half an hour.

[0053] The method for preparing astaxanthin is the same as in ...

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Abstract

A process for preparing astaxanthin from phylloxanthinextracted from marigold includes such steps as preparing high-purity phylloxanthin crystal, preparing kryptoxanthin, and preparing astaxanthin.

Description

technical field [0001] The present invention relates to the method for preparing a kind of substance with natural plant extract as raw material, specifically, a kind of natural plant marigold (Marigold Flower also known as marigold) extract-lutein extract as raw material, first A method for making high-purity lutein crystals, zeaxanthin, and then astaxanthin. Background technique [0002] The content of lutein and zeaxanthin in marigold is extremely high, and other carotenoids are less impurity, easy to separate and purify, and can be used as a good source for industrial production. The lutein prepared from marigold extract is a pollution-free natural yellow pigment. [0003] Lutein extract, also known as marigold extract, is made by fermenting marigold flowers in a closed-light fermentation tank under the action of fermentation bacteria, and then processed by pressing, drying, crushing, granulating and other processes. The best source of lutein. The lutein in it exists i...

Claims

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Application Information

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IPC IPC(8): C07C403/24
Inventor 董旭丽
Owner 董旭丽
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