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Supercritical carbon dioxide process for extracting lutein from marigold flower

A marigold flower, carbon dioxide technology, applied in chemical instruments and methods, bulk chemical production, azo dyes, etc., can solve the problems of raw materials, resource waste, odorous solvent residues, affecting product quality, etc., to achieve stable color matching, High extraction rate and environmentally friendly effect

Inactive Publication Date: 2004-08-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its product has low yield, poor purity, peculiar smell and high solvent residue, which seriously affects product quality and causes waste of raw materials and resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Put the picked marigold flowers into a fermentation cellar for natural fermentation in the dark for 12 days; dry the fermented marigold flowers in a continuous spiral rotary kiln with dry air under the condition of temperature ≤ 60°C and dark; The dry marigold flower is crushed to 30 orders;

[0022] (2) 400g of pulverized marigold flower material is packed into the extractor, and the supercritical CO with a purity of 99% 2 , extracted at a pressure of 30Mpa and a temperature of 45°C for 5 hours to obtain 79g of extract;

[0023] (3) Supercritical CO 2 The extract was distilled with a rotary evaporator at a temperature of 65° C. and a vacuum of 540 mmHg for 30 minutes to obtain 32 g of marigold flower extract;

[0024] (4) Saponifying the extract with 50% potassium hydroxide ethanol solution at a temperature of 50° C. for 50 minutes;

[0025] (5) Separating and obtaining water-soluble lutein natural food coloring. Its purity is 19%, and its color value is 275. ...

Embodiment 2

[0027] (1) Add the fermented marigold flowers by 0.02% of the weight to the fermented marigold flowers, put them into a fermentation cellar and ferment them in the dark for 3 days; dry the fermented marigold flowers in low-temperature vacuum under the condition of temperature≤60°C and avoid light; The marigold flower is crushed to 30 mesh;

[0028] (2) 400g of pulverized marigold flower material is packed into the extractor, and the supercritical CO with a purity of 99% 2 , extracted at a pressure of 32Mpa and a temperature of 45°C for 5 hours to obtain 90g of extract;

[0029] (3) Supercritical CO 2 The extract was distilled for 30 minutes at a temperature of 65° C. and a vacuum of 540 mmHg with a rotary evaporator to obtain 36 g of marigold flower extract;

[0030] (4) Saponifying the extract with 50% potassium hydroxide ethanol solution at a temperature of 50° C. for 60 minutes;

[0031] (5) Separating and obtaining water-soluble lutein natural food coloring. Its purity...

Embodiment 3

[0033] (1) Put the picked marigold flowers into a fermentation cellar for natural fermentation in the dark for 12 days; dry the fermented marigold flowers in a continuous spiral rotary kiln with dry air under the condition of temperature ≤ 60°C and dark; The dry marigold flower is crushed to 30 orders;

[0034] (2) 400g of pulverized marigold flower material is packed into the extractor, and the supercritical CO with a purity of 99% 2 , extracted at a pressure of 28Mpa and a temperature of 45°C for 5 hours to obtain 80g of extract;

[0035] (3) Supercritical CO 2 The extract was distilled for 30 minutes at a temperature of 65° C. and a vacuum of 540 mmHg with a rotary evaporator to obtain 30 g of marigold flower extract;

[0036] (4) Saponifying the extract with 50% potassium hydroxide ethanol solution at a temperature of 50° C. for 50 minutes;

[0037] (5) Separating and obtaining water-soluble lutein natural food coloring. Its purity is 18%, and its color value is 262. ...

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Abstract

The supercritical carbon dioxide process for extracting lutein from merigold flower includes the extraction of fermented, dried and crushed merigold flower material with supercritical carbon dioxide having ethanol entrainer to obtain merigold flower extractum and the saponification of merigold flower extractum with potassium hydroxide to obtain water soluble lutein resin used as edible color. The present invention has simple technological process with low power consumption and environment friendship and the product has high purity, pure color, high heat and light stability and stable color.

Description

Technical field: [0001] The invention belongs to a method for extracting lutein, in particular to a method for preparing edible natural yellow pigment by extracting lutein from marigold flowers with supercritical carbon dioxide. Background technique: [0002] Among the colorants used in food, beverage, cosmetics and other industries, chemically synthesized colorants account for a large proportion, but are gradually being eliminated due to their certain toxicity and side effects. At present, many kinds of natural colorants which are non-toxic, pollution-free and beneficial to human health are gradually being developed and utilized by people. Lutein has attracted more and more attention due to its bright color, strong coloring power, safety, non-toxicity, and rich nutrition. It is widely used in various fields such as food, cosmetics, medicine, tobacco, and poultry feed. Lutein is mainly composed of lutein, the molecular formula of lutein: C 40 h 56 o 2 , the molecular wei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00
CPCY02P20/54
Inventor 侯相林杜俊民王国富乔欣刚武练增
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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