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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 reaction similar to that described in this technique, but not from zeaxanthin to astaxanthin

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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Effect test

Embodiment 1

[0039] 1. Preparation of Lutein Crystals

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

[0041] After 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, centrifugally filter, and discard the aqueous phase. Washed three times with water, the color of the filtrate was clear. Centrifuge to obtain 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. Lutein content reaches more than 80%.

[0043] Then wash the lutein crystals with a nonpolar or weakly pol...

Embodiment 2

[0051] One-step production of zeaxanthin from lutein extract

[0052] Weigh 150g of dry lutein extract (130g lutein / kg extract) in an autoclave, add 150ml of propylene glycol and 20ml of nonylphenol polyoxyethylene ether, stir and mix evenly; then add 50g of KOH into the autoclave, And the reaction kettle was sealed well, and nitrogen protection was carried out. Slowly raise the temperature to 100°C, and react at a constant temperature for 20h. Maintain uniform rotational stirring (120 RPM) during the reaction. Samples were taken and analyzed by high-pressure liquid chromatography, and the conversion rate reached more than 80%. Weigh 1.4g of 60% zeaxanthin into a 50ml glass reactor, add 20ml of chloroform, and stir evenly. Aqueous sodium chlorate solution (0.3 g / 10 ml water) was added under ice cooling. NaHCO 3 The pH value of the solution was adjusted to make pH=8. Nitrogen protection was carried out subsequently, and the reaction was carried out for half an hour.

[0...

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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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