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Method for extracting anthocyanin from red rice red

A technology of red rice red and anthocyanin, which is applied in the field of preparation of natural pigments, can solve the problems of affecting the purity and quality of anthocyanins, and the limited use range of anthocyanins, so as to improve the purity and quality, and improve the quality of anthocyanins. Content, the effect of expanding the range of use

Active Publication Date: 2012-06-27
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main component of red rice red pigment is anthocyanin, but it also contains a large amount of impurities such as starch, sugar, protein, inorganic salt, etc., which seriously affects the purity and quality of anthocyanin, making the use of anthocyanin serious. restricted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: The method for extracting anthocyanins from red rice red adopts the following process steps.

[0019] Take 100kg of red rice red as raw material, add 400kg of pure water to dilute to obtain 500kg of diluent (color scale E=1.7), stand still for 10 hours, and remove impurities; after removing impurities, the diluent passes through a three-legged centrifuge with a 300-mesh filter cloth Coarse filtration, then filter through 10um, 1um bag filter, 0.220um ceramic membrane, and collect the filtrate; the above-mentioned filtrate is adsorbed with macroporous adsorption resin AB-8, analyzed with 50wt% alcohol, and the analytical solution is collected; the above-mentioned The analysis solution was treated with ion exchange resin LSA-900C, then concentrated to no alcohol by using a thin film evaporator, and then sprayed the above liquid with a spray dryer to obtain 16 kg of black rice anthocyanins. The content of anthocyanin obtained by hydrochloric acid-methanol met...

Embodiment 2

[0020] Embodiment 2: The method for extracting anthocyanins from red rice red adopts the following process steps.

[0021] Using 220kg of red rice red as raw material, add 880kg of pure water to obtain 1100kg of diluent, stand still for 10 hours, and remove impurities; the diluent is coarsely filtered through a three-legged centrifuge with a 300-mesh filter cloth, and then filtered through a 10um and 1um bag filter filter, 0.220um ceramic membrane, and collect the filtrate; the above-mentioned filtrate is adsorbed with macroporous adsorption resin X-5, and then analyzed with 50wt% alcohol to collect the analysis solution; the above-mentioned analysis solution is treated with ion exchange resin D113, and then Utilize a thin-film evaporator to concentrate to no alcohol, and then use a spray dryer to spray the above liquid into powder to obtain 33.5 kg of black rice anthocyanins. The content of anthocyanin obtained by hydrochloric acid-methanol method (UV) was determined to be 30...

Embodiment 3

[0022] Embodiment 3: The method for extracting anthocyanins from red rice red adopts the following process steps.

[0023] Using 600kg of red rice red as raw material, add 2400kg of pure water to obtain 3000kg of diluent, stand still for 10 hours, and remove impurities; the diluent is coarsely filtered by a three-legged centrifuge with a 300-mesh filter cloth, and then filtered through a 10um and 1um bag filter filter, 0.220um ceramic membrane, and collect the filtrate; the above-mentioned filtrate is adsorbed with macroporous adsorption resin NKA-9, and then analyzed with 50wt% alcohol to collect the analysis solution; the above-mentioned analysis solution is treated with ion exchange resin 001X7, and the analysis solution Utilize a thin-film evaporator to concentrate to no alcohol, and then use a spray dryer to spray the above liquid into powder to obtain 87.8kg of black rice anthocyanins. The content of anthocyanin obtained by hydrochloric acid-methanol method (UV) was dete...

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Abstract

The invention discloses a method for extracting anthocyanin from red rice red. The method comprises the following steps of: diluting a red rice red pigment by using water, standing and removing impurities; filtering the diluent obtained after the impurities are removed to obtain filtrate of 0.22 to 0.45mum, adsorbing the filtrate by using macroporous adsorption resin, and resolving the filtrate by using alcohol to obtain a resolved solution; and treating the resolved solution by using ion exchange resin, concentrating and spraying, and thus obtaining the anthocyanin. According to the method, the impurities such as macromolecular saccharide, protein and the like can be effectively removed by using the macroporous resin; organic substances and inorganic salt substances can be effectively removed by using the ion exchange resin; therefore, the anthocyanin content is effectively improved. By the method, the purity and the quality of the anthocyanin are improved, the content of the obtained anthocyanin reaches over 30 weight percent, and the using range of the anthocyanin is effectively expanded.

Description

technical field [0001] The invention relates to a method for preparing natural pigments, in particular to a method for extracting anthocyanins from red rice red. Background technique [0002] Black rice anthocyanin is the main flavonoid in black rice. It is a water-soluble natural pigment widely present in plants in nature. In the natural state, it often forms glycosides with various monosaccharides, also known as anthocyanins. As a natural food coloring, anthocyanins are safe, non-toxic, rich in resources, and have certain nutritional and pharmacological effects. They have great application potential in food, cosmetics, medicine, and health care. A large number of studies have shown that anthocyanins have various physiological functions such as anti-oxidation, anti-mutation, prevention of cardiovascular and cerebrovascular diseases, protection of the liver, and inhibition of tumor cell occurrence. In recent years, some domestic manufacturers only use black rice to produce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 暴海军薛强任庆海张建霞
Owner CHENGUANG BIOTECH GRP CO LTD
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