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Preparation method of heatproof anthocyanin pigment

Active Publication Date: 2015-03-11
YUNNAN RAINBOW BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after anthocyanin pigments are used for food coloring, with the increase of food processing and storage temperature, and the extension of time, the pigments will degrade, the color value will be lost and the wave peak will shift, causing the food to change color and fade after heating.

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  • Preparation method of heatproof anthocyanin pigment
  • Preparation method of heatproof anthocyanin pigment
  • Preparation method of heatproof anthocyanin pigment

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preparation example Construction

[0026] The invention provides a method for preparing heat-resistant anthocyanin pigments, figure 1 A schematic flow diagram of the preparation method of the present invention is shown. Such as figure 1 As shown, this includes the following steps:

[0027] Reflux extraction step S1200: reflux extracting the anthocyanin plant material with an acidic ethanol solution with a pH of 2.5-3.5 to obtain an extract;

[0028] Primary filtration step S1300: filtering the extract through a filter device with a filter aperture of 150-250 mesh and 5-15 μm in sequence to obtain a crude filtrate;

[0029] Concentrating under reduced pressure step S1400: concentrating the crude filtrate under reduced pressure at 40-60°C until the Baume degree is 2-4° to obtain a concentrate;

[0030] Secondary filtration step S1500: filtering the concentrated solution with an ultrafiltration membrane to obtain a refined filtrate;

[0031] Heat treatment step S1600: adding at least one of acetic acid, acetic...

Embodiment 1

[0042]1000 kg of red rice is used as raw material, washed and crushed to 20 mesh powder. Use 12,000 kg of acidic ethanol solution with pH 2.5 (hydrochloric acid and 40 vol% ethanol) to carry out reflux extraction on the above-mentioned pulverized red rice, and extract at 40°C for 60 minutes to obtain an extract. The extract was filtered sequentially through a 150-mesh filter sieve and a 15 μm filter bag to obtain 10,000 kg of crude filtrate. Concentrate under reduced pressure at 50°C to obtain 4000 kg of concentrated liquid. The obtained concentrated solution was filtered through a hollow fiber membrane with a filter pore size of 0.1 μm to obtain 3800 kg of refined filtrate. Add 4 kg of acetic anhydride and 2 kg of sodium phytate to the fine filtrate, stir evenly, place in a constant temperature water bath at 80°C and heat for 40 minutes, and then use a polyacrylamide membrane with a molecular weight cut-off of 500 to process the heated fine filtrate. filter, get The heat-...

Embodiment 2

[0044] Take 1000 kg of red radish as raw material, wash and crush it to 40 mesh powder, use 20000 kg of pH3.0 acidic ethanol solution (phosphoric acid and 15vol% ethanol to form) to carry out reflux extraction on the above-mentioned crushed red radish, at 50 ℃ Extract for 50 minutes to obtain the extract. The extract was successively filtered through a 200-mesh filter sieve and a 5 μm filter bag to obtain 20,000 kg of crude filtrate. Concentrate under reduced pressure at 40°C to obtain 14000 kg of concentrated liquid. The obtained concentrated solution was filtered through a hollow fiber membrane with a filter pore size of 0.2 μm to obtain 13,200 kg of refined filtrate. Add 1 kg of acetic acid and 3 kg of phytic acid to the fine filtrate, stir evenly, place in a constant temperature water bath at 80°C and heat for 30 minutes, then filter the heated fine filtrate with a polyacrylamide membrane with a molecular weight cut-off of 2000, have to The heat-resistant radish red pi...

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Abstract

The invention discloses a preparation method of a heatproof anthocyanin pigment. The preparation method comprises the following steps: (1) reflux extraction: using an acidic ethanol solution with a pH value of 2.5 to 3.5 to carry out reflux extraction on anthocyanin plants to obtain an extract; (2) one-step filtration: filtering the extract by a filtering device with an aperture of 150-250 meshes and a filtering device with an aperture of 5 to 15 [mu]m in sequence to obtain a coarse filtrate; (3) reduced pressure condensation: carrying out reduced pressure condensation on the coarse filtrate at a temperature of 40 to 60 DEG C until the baume degree reaches 2 to 4 degrees so as to obtain a condensate; (4) secondary filtration: filtering the obtain condensate by an ultrafiltration membrane to obtain a fine filtrate; (5) thermal treatment: adding at least one of acetic acid, acetic anhydride, humic acid, and sodium humate into the fine filtrate, heating the filtrate for 20 to 40 minutes at a temperature of 65 to 85 DEG C so as to obtain liquid heatproof anthocyanin pigment. The anthocyanin pigment prepared by the provided method can be used to color food, the colored food will not fade, and the color will not change after baking or a thermal treatment.

Description

technical field [0001] The invention relates to the field of pigment preparation, in particular to a method for preparing anthocyanin pigment with high heat resistance. Background technique [0002] Anthocyanin pigments are a class of compounds formed by the combination of anthocyanins and glycosidic bonds. They are widely found in the cell fluids of flowers, fruits, stems, leaves and root organs of plants, making plants appear in different colors from red, purple to blue. . Anthocyanins are flavonoids - a group of compounds that can appear red in a class of substances based on the flavonoid nucleus. It is purplish red and blue under alkaline conditions. Anthocyanins have the functions of anti-oxidation, scavenging free radicals, reducing low-density lipoprotein, anti-mutation, anti-tumor, and improving vision. [0003] With the advancement of science and technology, my country's food industry continues to grow and develop. At the same time, with the improvement of people...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54A23L1/275A23L5/43
CPCA23L5/43C09B61/00C09B67/0096
Inventor 倪崛苏记蒋德生杨俊文祝涛
Owner YUNNAN RAINBOW BIO TECH
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