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Extraction and purification process of grape skin pectin

A technology of grape skin and pectin, which is applied in the field of food and its processing, can solve the problems of restricting the development and application of grape skin pectin and the lack of extraction process conditions, and achieve the effects of promoting development and application, ensuring purity, and good commercial value

Pending Publication Date: 2022-05-06
NANJING TONGZE AGRI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the extraction of low-ester pectin from grape skins using pressurized liquid extraction technology combined with acid hydrolysis, and there is also a lack of influence of extraction process conditions on pectin physical and chemical parameters such as degree of esterification, galacturonic acid content, and molecular weight. The systematic research of grape skin pectin seriously restricts the development and application of grape skin pectin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention relates to an extraction and purification process of grape peel pectin. The preparation method comprises the following steps:

[0036] (1) Crush and sift the grape skin, weigh 10g, and scald it in hot water at 95 ℃ for 10min to inactivate the naturally occurring pectinase in the peel. Rinse the grape skin with distilled water repeatedly for 3 times to remove the soluble solids, pigments, bitterness and sugar in the grape skin;

[0037] (2) Add pre prepared to PH3 250ml distilled water of 0, and then 5 equal parts, respectively at 60 ℃, 80 ℃, 100 ℃, 120 ℃ and 130 ℃ and under the pressure of 0.5MPa for 90min. After extraction, the extract is filtered under reduced pressure to obtain the filtrate;

[0038] (3) Under the conditions of pH 3.0, Volume 8 BV and flow rate 25 bv / h of the upper column liquid, decolorize with AB-8 macroporous adsorption resin column, transfer the upper column liquid to a round bottom flask, and concentrate under reduced pressure with a...

Embodiment 2

[0042] The invention relates to an extraction and purification process of grape peel pectin. The preparation method comprises the following steps:

[0043] (1) Crush and sift the grape skin, weigh 10g, and scald it in hot water at 95 ℃ for 10min to inactivate the naturally occurring pectinase in the peel. Rinse the grape skin with distilled water repeatedly for 3 times to remove the soluble solids, pigments, bitterness and sugar in the grape skin;

[0044] (2) Add pre prepared to PH3 250ml distilled water of 0, divide it into 5 equal parts first, and extract it for 30min, 60min, 90min, 120min and 150min respectively under the pressure of 100 ℃ and 0.5MPa. After extraction, filter the extract under reduced pressure to obtain the filtrate;

[0045] (3) Under the conditions of pH 3.0, Volume 8 BV and flow rate 25 bv / h of the upper column liquid, decolorize with AB-8 macroporous adsorption resin column, transfer the upper column liquid to a round bottom flask, and concentrate under ...

Embodiment 3

[0049] The embodiment of the application relates to an extraction and purification process of grape peel pectin, which comprises the following steps:

[0050] (1) Crush and sift the grape skin, weigh 10g, and scald it in hot water at 95 ℃ for 10min to inactivate the naturally occurring pectinase in the peel. Rinse the grape skin with distilled water repeatedly for 3 times to remove the soluble solids, pigments, bitterness and sugar in the grape skin;

[0051] (2) Divide the grape skin obtained by (1) into 5 equal parts and add them to PH3 0, 100 ml, 150 ml, 200 ml, 250 ml and 300 ml of distilled water were extracted at 100 ℃ and 0.5 MPa for 90 min. after extraction, the extract was filtered under reduced pressure to obtain filtrate;

[0052] (3) Under the conditions of pH 3.0, Volume 8 BV and flow rate 25 bv / h of the upper column liquid, decolorize with AB-8 macroporous adsorption resin column, transfer the upper column liquid to a round bottom flask, and concentrate under reduc...

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PUM

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Abstract

The invention provides a process for extracting and purifying grape skin pectin, which comprises the following steps of: extracting the grape skin pectin by using a pressurizing extraction method under the conditions that the extraction temperature is 100 DEG C, the extraction time is 90 minutes and the pH value of an extraction medium is 3.0, and then extracting the grape skin pectin under the conditions that the volume of an upper column liquid is 8BV, the pH value of the upper column liquid is 3.0 and the flow velocity is 25BV / h. AB-8 type resin is used for decoloration and pectin extraction of the grape skin, the yield of the obtained product is 92.12%, and the purity is 87.24%; according to the method, the grape skin pectin is extracted by utilizing AB-8 type resin through a pressurized extraction method, the yield and purity of the pectin are guaranteed to the maximum extent, and the method has wide market prospects and huge economic benefits.

Description

technical field [0001] The invention relates to the technical field of food and its processing, in particular to an extraction and purification process of grape peel pectin. Background technology [0002] At present, the research on grape skin at home and abroad mainly focuses on the extraction of polyphenols, pigments and resveratrol. For example, the polyphenols from wine grape skin residue are extracted by ultrasonic assisted method, and the optimal extraction conditions are optimized by response surface methodology; The anthocyanin of grape skin was extracted by microwave-assisted extraction. The response surface design and analysis of the extraction process parameters were carried out, and the best extraction process was obtained; Resveratrol was extracted from grape skin by ethanol reflux method. The extraction process parameters were optimized by orthogonal test, and the optimum extraction conditions were obtained. However, there are few reports on the extraction and purif...

Claims

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Application Information

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IPC IPC(8): C08B37/06
CPCC08B37/0045C08B37/0048
Inventor 杨成东
Owner NANJING TONGZE AGRI SCI & TECH
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