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Process for extracting cromolyn from black soybean hull

A technology of black soybean hulls and anthocyanins, which is applied in the field of anthocyanin extraction, can solve the problems of restricting the widespread use of black soybean red pigment and low anthocyanin content, and achieve the effects of less impurities, stable process and stable quality

Inactive Publication Date: 2006-10-11
天津市尖峰天然产物研究开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products produced by the existing extraction process have relatively low anthocyanin content, generally only 2%-7%, which severely limits the widespread use of black bean red pigment

Method used

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  • Process for extracting cromolyn from black soybean hull
  • Process for extracting cromolyn from black soybean hull
  • Process for extracting cromolyn from black soybean hull

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Extraction of black soybean hull raw material: adding 600g volume percent concentration to 60g black soybean hull raw material is 75% ethanol aqueous solution, and described ethanol aqueous solution is adjusted with 2% HCl aqueous solution so that its pH is 3, soaks and extracts for 2 hours, filters, The mesh number of the filter is 100, extract twice, concentrate the extract at 70°C to no alcohol, let it stand at a temperature of 0-30°C for 5 hours, discard the precipitate, and obtain the supernatant;

[0026] (2) Adsorption and separation of styrene resin: the supernatant is adsorbed by styrene resin AB-8, eluted with 600mL50% ethanol aqueous solution, collected when the color becomes darker, and then washed with water until the effluent is colorless , the eluate was dried under reduced pressure at 70° C. to obtain 4.3 g of anthocyanins with an anthocyanin content of 11.2%.

Embodiment 2

[0028] (1) Extraction of black soybean hull raw material: adding 480g volume percent concentration to 60g black soybean hull raw material is 100% ethanol, and described ethanol is adjusted with 2% acetic acid aqueous solution so that its pH is 1, soaks and extracts for 24 hours, filters, filter screen The mesh number is 80, extract once, concentrate the extract at 50°C to no alcohol, let it stand at a temperature of 0-30°C for 12 hours, discard the precipitate, and obtain the supernatant;

[0029] (2) Styrene resin adsorption separation: the supernatant is adsorbed by styrene resin HPD100 type, and eluted with 600mL volume percentage concentration of 10% ethanol aqueous solution, starting to collect when the color becomes darker, and the eluted The solution is dried at 60°C under reduced pressure to obtain anthocyanins.

Embodiment 3

[0031] (1) Extraction of black soybean hull raw material: adding 720g volume percentage concentration in 60g black soybean hull raw material is 10% ethanol aqueous solution, described ethanol aqueous solution is adjusted with 2% sulfuric acid to make its pH be 1, soak and extract 1 hour, filter, filter The mesh number of the net is 120, extract twice, concentrate the extract at 80°C to no alcohol, let stand at a temperature of 0-30°C for 6 hours, discard the precipitate, and obtain the supernatant;

[0032] (2) Styrene resin adsorption and separation: the supernatant is adsorbed by styrene resin HPD300 type, and eluted with 500 mL volume percentage concentration of 95% ethanol aqueous solution, starting to collect when the color becomes darker, and the eluted Liquid at 50 ° C, dried under reduced pressure to obtain anthocyanins.

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Abstract

This invention publisizes a method of extract colors glycosides from black soya bean skin, the procedure is as followings: 1. Extract the source black soya bean skin: add ethanol aqueous solution or methanol aqueous solution into black soya bean, soak, extract and filter. The aqueous solution's ph should be in the range of 1 to 4. Condense the leach to ethanol-free, get rid of the sediment, the supernatant obtained. 2. Polystyrene adsorption stripping: elute supernatant with water, ethanol aqueous solution or methanol aqueous solution after polystyrene adsorption stripping. Collect when it turns to dark. Desiccate with depression under 70deg C, colors glycosides obtained. The invention is advantageous in the high quality of colors glycosides, stable process, environment-friendly, low retained percentage of organic solvent and heavy metal.

Description

technical field [0001] The invention relates to a method for extracting anthocyanin from natural plants, in particular to a method for extracting anthocyanin from black soybean skin. Background technique [0002] As we all know, it is often necessary to add pigments to make food and beverages, so as to achieve a good effect that is pleasing to the eye. However, chemically synthesized pigments are used in large quantities in the prior art, and long-term use will have adverse effects on the human body and endanger human health. Therefore, searching for and preparing natural pigments has attracted widespread attention. Anthocyanins are the most familiar water-soluble natural food pigments, which are widely distributed in nature and constitute the blue, red, purple and yellow of most varieties in the plant kingdom. As a natural food coloring, anthocyanins are safe, non-toxic, rich in resources, and have certain nutritional and pharmacological effects, so they have great applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H1/08C07H17/065
Inventor 刘丹刘岱琳於洪建
Owner 天津市尖峰天然产物研究开发有限公司
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