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Extraction process of peanut-skin red pigment

An extraction process, peanut technology, applied in the direction of azo dyes, organic dyes, chemical instruments and methods, etc., can solve the problems of long extraction time, large solvent consumption, low extraction volume, etc., and achieve uniform extraction effect and short extraction time , High extraction efficiency

Inactive Publication Date: 2015-11-18
CHONGQING DOUHAO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the traditional method for extracting peanut red pigment, such as long extraction time, large solvent consumption, low extraction amount, and high cost, thereby providing a new extraction method for peanut red pigment The method improves the traditional alcohol extraction method, increases the extraction yield of peanut red pigment without increasing the extraction cost, shortens the extraction time, reduces the amount of solvent used, and lays a foundation for expanding the industrial application value of peanut red pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Take new peanut clothes, wash them with water, dry them to constant weight, and finally crush them through a 100-mesh sieve to make peanut clothes powder. Weigh 100 grams of the above peanut clothes powder and set aside.

[0032] 2) Add 95wt% ethanol (peanut coating powder: 95wt% ethanol=1g: 5mL), and adjust the pH value to 2.0 with 0.1 mol / liter citric acid solution, and pretreat at room temperature for 5 minutes at a high speed of 10000 rpm, Then, extract homogeneously at 3000 rpm for 30 minutes and then filter.

[0033] 3) Collect the filtrate, add 95wt% ethanol to the filter residue (filter residue: 95wt% ethanol = 1g: 5mL), and adjust the pH value to 2.0 with 0.1 mol / liter citric acid solution, and homogenize at room temperature at 3000 rpm Filter after 30 minutes of extraction.

[0034] 4) Combine the two filtrates, centrifuge at 1000 rpm for 10 minutes at room temperature, remove the precipitate, collect the supernatant and freeze-dry it into a powder to obta...

Embodiment 2

[0036] 1) Take the fresh skin, wash it with water, dry it to constant weight, crush it through a 100-mesh sieve to make peanut powder, weigh 100 grams of the peanut powder, and set aside.

[0037] 2) Add 95wt% ethanol (peanut coating powder: 95wt% ethanol=1g:7mL), and adjust the pH value to 3.0 with 0.1 mol / liter citric acid solution, and pretreat at room temperature for 10 minutes at a high speed of 10000 rpm, Then, extract homogeneously at 3000 rpm for 20 minutes and then filter.

[0038] 3) Collect the filtrate, add 95wt% ethanol to the filter residue (filter residue: 95wt% ethanol = 1g: 7mL), and adjust the pH value to 3.0 with 0.1 mol / L citric acid solution, and extract homogeneously at room temperature at 3000 rpm Filter after 20 minutes.

[0039] 4) Combine the two filtrates, centrifuge at 1000 rpm for 15 minutes at room temperature, remove the precipitate, collect the supernatant and freeze-dry it into a powder to obtain 14.3 grams of peanut red pigment, color: purple...

Embodiment 3

[0041] 1) Take new peanut clothes, wash them, dry them to constant weight, crush them through a 100-mesh sieve to make peanut clothes powder, weigh 100 grams of the above peanut clothes powder, and set aside.

[0042] 2) Add 95wt% ethanol (peanut powder: 95wt% ethanol = 1g: 10mL), and adjust the pH value to 4.0 with 0.1 mol / liter citric acid solution, and pretreat at room temperature at a high speed of 10000 rpm for 10 minutes, Then, extract homogeneously at 3000 rpm for 10 minutes and then filter.

[0043] 3) Collect the filtrate, add 95wt% ethanol to the filter residue (filter residue: 95wt% ethanol = 1g: 10mL), and adjust the pH value to 4.0 with 0.1 mol / L citric acid solution, and extract homogeneously at 3000 rpm at room temperature Filter after 10 minutes.

[0044] 4) Combine the two filtrates, centrifuge at 1000 rpm for 15 minutes at room temperature, remove the precipitate, collect the supernatant and freeze-dry it into a powder to obtain 14.6 grams of peanut red pigm...

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Abstract

The present invention discloses an extraction process of peanut-skin red pigment. The extraction process comprises: (1) mixing dried peanut-skin power with 95 wt % of ethanol to obtain a mixture; using a citric acid aqueous solution to adjust the pH value of the mixture to 2-4; and at room temperature, performing high-speed pre-treatment on the mixture; and performing homogenization, extraction and filtration on the pre-treated mixture; (2) mixing filter residues filtered in step (1) with 95 wt % of ethanol to obtain a mixed solution; using a citric acid aqueous solution to adjust pH of the mixed solution to 2-4; and performing homogenization, extraction and filtration on the mixed solution; and and (3) centrifuging filtrate obtained in step (2); collecting a supernatant liquid; and freezing and drying the collected liquid into powder, thereby obtaining the peanut-skin red pigment. The extraction process of peanut-skin red pigment provided by the present invention is simple, has low requirements on production equipment, and has high extraction efficiency; and the extraction time is greatly reduced, so that the extraction process is obviously superior to a conventional solvent extraction method. The obtained peanut-skin red pigment is good in water-solubility, good in appearance and color, stable in property and shape, and is suitable for being used as a raw material for food additives and healthcare food.

Description

technical field [0001] The invention belongs to the technical field of extracting natural pigments, and in particular relates to a process for extracting peanut red pigments. Background technique [0002] Peanut is one of the main oil crops in the world. The skin of peanut is the seed coat of peanut, which is the seed coat of leguminous plant peanut. It is reddish brown, membranous, sweet, slightly bitter and flat in nature. Its main components are 37%-42% cellulose, 10%-14% fat, 11%-18% protein and 8%-21% ash, and also contain about 7% tannins and various pigments. The effect of stopping bleeding, dispersing stasis, and reducing swelling is the main drug for treating anemia and hemorrhagic disease. It also has the effects of nourishing the kidney and stomach, moistening the lungs and relieving cough, nourishing the middle and replenishing qi, and clearing the intestines to detoxify. The effect of peanut clothing is stronger than that of peanuts itself. 50 times, in the "Co...

Claims

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Application Information

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IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 邓焱飞宁发子
Owner CHONGQING DOUHAO BIOTECH
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