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Grape skin pigment extraction technology

A grape skin pigment and extraction process technology, applied in the field of natural pigment extraction, can solve the problems of increased extraction cost, increased cost of post-solvent, low economic applicability, etc., to achieve uniform extraction effect, good appearance and color, and good water solubility Effect

Inactive Publication Date: 2015-03-25
QINGDAO ZHONGREN ZHIYE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional extraction of pigments with ethanol as a solvent has its advantages, but there are also many disadvantages. The yield of pigments is very low, which is easy to cause waste, and the recovery of the post-solvent also increases the cost, and the economic applicability is low; Zhou Wenwen reported The extraction time of the optimized process is longer, which also increases the cost of extraction to a certain extent

Method used

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  • Grape skin pigment extraction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 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 / L citric acid solution, and homogenize at room temperature at 3000 rpm Filter after 30 minutes of extraction.

[0037] 4) Combine the two filtrates, centrifuge at 1000 rpm for 10 minutes at room temperature to remove the precipitate, collect the supernatant and freeze-dry it into a powder to obtain 3.26 grams of grape skin pigment, color: purple.

[0038] Example 2

[0039] 1) Take the fresh skin, wash it with water, dry it to constant weight, crush it through a 100-mesh sieve to make grape skin powder, weigh 100 grams of the above grape skin powder, and set aside.

Embodiment 2

[0041] 3) Collect the filtrate, add 95wt% ethanol to the filter residue (filter residue: 95wt% ethanol = 1g: 7mL), 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.

[0042] 4) Combine the two filtrates, centrifuge at 1000 rpm for 15 minutes at room temperature to remove the precipitate, collect the supernatant and freeze-dry it into a powder to obtain 3.35 grams of grape skin pigment, color: purple.

[0043] Example 3

[0044] 1) Take the fresh skin, wash it with water, dry it to constant weight, crush it through a 100-mesh sieve to make grape skin powder, weigh 100 grams of the above grape skin powder, and set aside.

Embodiment 3

[0046] 3) Collect the filtrate, add 95wt% ethanol to the filter residue (filter residue: 95wt% ethanol = 1g: 10mL), adjust the pH value to 4.0 with 0.1 mol / L citric acid solution, and extract homogeneously at room temperature at 3000 rpm Filter after 10 minutes.

[0047] 4) Combine the two filtrates, centrifuge at 1000 rpm for 15 minutes at room temperature to remove the precipitate, collect the supernatant and freeze-dry it into a powder to obtain 3.31 grams of grape skin pigment, color: purple.

[0048] Example 4

[0049] 1) Take the fresh skin, wash it with water, dry it to constant weight, and finally crush it through a 100-mesh sieve to make grape skin powder. Weigh 100 grams of the above-mentioned grape skin powder and set aside.

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Abstract

The invention discloses a grape skin pigment extraction technology. The technology comprises the following steps: 1, mixing dried grape skin powder with 95wt% ethanol, adjusting the pH value of the above obtained solution to 2-4 by using an aqueous citric acid solution, carrying out high speed pretreatment at room temperature, homogeneously extracting, and filtering; 2, mixing filter residues obtained after the filtration with 95wt% ethanol, adjusting the obtained solution to 2-4 by using the aqueous citric acid solution, homogeneously extracting, and filtering; and 3, centrifuging the obtained filtrate, collecting the obtained supernatant, and freeze-drying to obtain powder in order to obtain a grape skin pigment. The high speed pretreatment is carried out under 5000-1000rpm for above 5min, and the homogeneous extraction is carried out under 1000-4000rpm for above 10min. The invention also discloses the grape skin pigment obtained through the technology. The extraction technology has the advantages of simplicity, low requirements on a production device, high extraction efficiency, and great shortening of the extraction time, is obviously better than traditional solvent extraction methods. The obtained grape skin pigment has the advantages of good water solubility, good appearance color and stable properties, and is suitable for being used as a food additive and a health food raw material.

Description

technical field [0001] The invention belongs to the technical field of extraction of natural pigments, and in particular relates to a grape skin pigment and an extraction process thereof. Background technique [0002] my country's grape brewing industry produces a large amount of grape pomace every year, and at 20-25% of the skin, at least hundreds of thousands of tons of pomace are produced every year. These dregs are mainly used in feed and fertilizer industries, resulting in very low added value, and a considerable part of them is not utilized and pollutes the environment. [0003] Studies have found that grape pomace contains more natural pigments, the content is generally above 3.7% (mass fraction), and its red pigment content is more than 300mg / 100g, and it is rich in anthocyanins. It is not only bright in color, It is excellent in dyeing and can be widely used in jams, acidic drinks and fruit wines. Compared with synthetic pigments, it has certain nutritional effects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54C09B67/14
CPCC09B61/00
Inventor 谭斌峰
Owner QINGDAO ZHONGREN ZHIYE BIOTECH
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