Method of extracting natural coloring matter anthocyanins in black rice

A technology for natural pigments and anthocyanins, which is applied in the field of extraction of natural pigments and anthocyanins, can solve the problems of increased extraction cost and large amount of ethanol, and achieves the effects of being beneficial to subsequent processing, high yield and maintaining integrity.

Inactive Publication Date: 2007-08-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively large amount of ethanol and the addition of enzymes, the cost of extraction has increased

Method used

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  • Method of extracting natural coloring matter anthocyanins in black rice
  • Method of extracting natural coloring matter anthocyanins in black rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The whole black japonica rice produced in Jiangsu is used as the raw material. 1 kg of whole-grain black rice that has been selected cleanly is added to the extraction tank 1; according to water: black rice=1:2 (W / W), 0.5 kg of 40° C. clear water is added to the extraction tank, and left to soak for 0.5 hours.

[0023] Put into 2kg80% ethanol aqueous solution of black rice weight 2 times in solvent tank 2, be heated to 50 ℃.

[0024] Put into 3kg60% ethanol aqueous solution of 3 times of black rice weight in solvent tank 3, be heated to 40 ℃.

[0025] The first leaching: the ethanol aqueous solution in the solvent tank 2 is pumped into the leaching tank 1 from the bottom of the leaching tank 1, and the ethanol aqueous solution passes through the black rice layer, and flows from the top of the leaching tank 1 together with the water for soaking the black rice Solvent tank 2, control the liquid flow rate, keep the black rice in the extraction tank 1 and not be taken out,...

Embodiment 2

[0029] The black rice Wugong No. 2 produced in Heilongjiang is used as raw material. Put 1 kg of whole-grain black rice that has been selected cleanly into extraction tank 1; add 1 kg of 20° C. clear water into extraction tank 1 according to water:black rice=1:1 (W / W), and let stand to soak for 2 hours.

[0030] Put into 5kg70% ethanol aqueous solution of 5 times of black rice weight in solvent tank 2, be heated to 40 ℃.

[0031] Put into the 2kg70% ethanol aqueous solution of black rice weight 2 times in solvent tank 3, be heated to 50 ℃.

[0032] The first leaching: the ethanol aqueous solution in the solvent tank 2 is pumped into the leaching tank 1 from the bottom of the leaching tank 1, and the ethanol aqueous solution passes through the black rice layer, and flows from the top of the leaching tank 1 together with the water for soaking the black rice Solvent tank 2, control the liquid flow rate, keep the black rice in the extraction tank 1 and not be taken out, the solve...

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Abstract

The invention discloses an extracting method of natural anthocyanin from black rice, which comprises the following steps: immersing black rice in the water at 20-40 deg.c; stewing; adding alcohol solution in two solvent grooves separately; heating to 40-50 deg.c; pumping alcohl solution from one solvent groove to leaching tank bottom; adding anthocyanin solvent into condensing tank; pumping the alcohol solution in the other solvent groove into leaching tank bottom; adding anthocyanin solvent in the condensing tank; distilling the condensing tank in the vacuum; spraying; drying; obtaining the product.

Description

technical field [0001] The invention relates to a method for extracting natural pigment anthocyanin from black rice, which belongs to the extraction technology of natural pigment anthocyanin. Background technique [0002] Anthocyanins (Proanthocyanidins), also known as anthocyanins, anthocyanins, anthocyanins, etc., are the most familiar water-soluble natural food pigments, widely distributed in nature, and constitute the blue, red, Purple and yellow etc. As a natural food coloring, anthocyanins are safe, non-toxic, rich in resources, and have certain nutritional and pharmacological effects, so they have great application potential in the fields of food, cosmetics, and medicine. [0003] The basic structure of natural anthocyanin aglycone is 3,5,7-trihydroxy-2-phenylbenzopyran, and the basic structural formula is: [0004] [0005] In the basic structure, different substituents at different positions on the benzene ring can be derived into different anthocyanins. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/04C07D311/62
Inventor 刘锋李崇张冀鲁张曾王芳李雪张大治张力擎
Owner TIANJIN UNIV
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