Method for extracting pectin from persimmon slag

Abstract

The invention discloses a method for extracting pectin from persimmon slag. The pectin is extracted by combining a method of soaking the persimmon slag with alkaline electrolytic water and a method ofperforming ultrasonic extracting with acidic electrolytic water, wherein the pH value of the acidic electrolytic water is 1.1 to 2.0, and the effective chloride concentration is 30 to 200 ppm; and the pH value of the alkaline electrolytic water is 11.0 to 12.5. According to the method for extracting the pectin from the persimmon slag, the extracting yield of the pectin is improved, and the obtained pectin product is high in purity and high in quality by combining the method of soaking the persimmon slag with the alkaline electrolytic water and the method of performing ultrasonic extracting with the acidic electrolytic water, and optimizing the parameters of the electrolytic water and ultrasonic extracting; the persimmon slag is soaked with the alkaline electrolytic water optimally, so that the waste is avoided, the cost is reduced, the pectin product quality and yield are further improved, and the green and environment-friendly industrial popularization and application are benefited.

Description

technical field

[0001] The invention relates to the technical field of food pectin extraction, in particular to a method for extracting pectin from persimmon pomace. Background technique

[0002] Pectin is a macromolecular acidic polysaccharide widely present in fruits, roots, stems, and leaves of plants, and is an important component of plant intercellular substance. It forms cell tissue in a natural colloidal state, and is combined with other substances such as hemicellulose and cellulose. Pectin has the functions of emulsifying, thickening, stabilizing and gelling, and has certain curative effect on chronic diseases such as hypertension and hyperlipidemia. It also has anti-cancer and anti-cancer effects, and is widely used in food, medicine, chemical industry, textile and other industries , played a positive role in improving people's lives.

[0003] The extraction of pectin is the process of converting insoluble pectin into soluble pectin and transferring soluble pecti...

Examples

Embodiment 1

[0078] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0079] Step 1. Take 50 grams of persimmon residue, add water to wash and filter, take 2 liters of alkaline electrolyzed water with a parameter pH value of 11.0, and an oxidation-reduction potential of 500mv, add it to the persimmon residue and soak for 18 hours;

[0080] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 750 ml of acidic electrolyzed water with a pH value of 1.1, an oxidation-reduction potential of 1100 mv, and an available chlorine concentration of 30-50 ppm to obtain a mixed solution. At 40 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 30 minutes with an ultrasonic power of 1200w, and the extract was collected;

[0081] Step 3, filter the extract solution obtained in step 2, concentrate the filtrate under reduced pressure, freeze and vacuum-dry...

Embodiment 2

[0083] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0084] Step 1. Take 100 grams of persimmon residue, add water to wash and filter, take 3 liters of alkaline electrolyzed water with a parameter pH value of 11.5, and an oxidation-reduction potential of 600mv, add it to the persimmon residue and soak for 14 hours;

[0085] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 2 liters of acidic electrolyzed water with a parameter pH value of 1.3, an oxidation-reduction potential of 1300mv, and an available chlorine concentration of 50-70ppm to obtain a mixed solution. At 35 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 40 minutes with an ultrasonic power of 1600w, and the extract was collected;

[0086] Step 3, filter the extract obtained in step 2 through a filter cloth, concentrate the filtrate under reduced pressu...

Embodiment 3

[0088] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0089] Step 1. Take 500 grams of persimmon residue, add water to wash and filter, take 10 liters of alkaline electrolyzed water with a parameter pH value of 12, and an oxidation-reduction potential of 700mv, add it to the persimmon residue and soak for 8 hours;

[0090] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 7.5 liters of acidic electrolyzed water with a pH value of 1.5, an oxidation-reduction potential of 1500mv, and an available chlorine concentration of 70-90ppm to obtain a mixed solution. At 50 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 50 minutes with an ultrasonic power of 800w, and the extract was collected;

[0091] Step 3, filter the extract solution obtained in step 2, concentrate the filtrate under reduced pressure, freeze and vacuum-dry...

technical field

[0001] The invention relates to the technical field of food pectin extraction, in particular to a method for extracting pectin from persimmon pomace. Background technique

[0002] Pectin is a macromolecular acidic polysaccharide widely present in fruits, roots, stems, and leaves of plants, and is an important component of plant intercellular substance. It forms cell tissue in a natural colloidal state, and is combined with other substances such as hemicellulose and cellulose. Pectin has the functions of emulsifying, thickening, stabilizing and gelling, and has certain curative effect on chronic diseases such as hypertension and hyperlipidemia. It also has anti-cancer and anti-cancer effects, and is widely used in food, medicine, chemical industry, textile and other industries , played a positive role in improving people's lives.

[0003] The extraction of pectin is the process of converting insoluble pectin into soluble pectin and transferring soluble pecti...

Examples

Embodiment 1

[0078] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0079] Step 1. Take 50 grams of persimmon residue, add water to wash and filter, take 2 liters of alkaline electrolyzed water with a parameter pH value of 11.0, and an oxidation-reduction potential of 500mv, add it to the persimmon residue and soak for 18 hours;

[0080] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 750 ml of acidic electrolyzed water with a pH value of 1.1, an oxidation-reduction potential of 1100 mv, and an available chlorine concentration of 30-50 ppm to obtain a mixed solution. At 40 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 30 minutes with an ultrasonic power of 1200w, and the extract was collected;

[0081] Step 3, filter the extract solution obtained in step 2, concentrate the filtrate under reduced pressure, freeze and vacuum-dry...

Embodiment 2

[0083] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0084] Step 1. Take 100 grams of persimmon residue, add water to wash and filter, take 3 liters of alkaline electrolyzed water with a parameter pH value of 11.5, and an oxidation-reduction potential of 600mv, add it to the persimmon residue and soak for 14 hours;

[0085] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 2 liters of acidic electrolyzed water with a parameter pH value of 1.3, an oxidation-reduction potential of 1300mv, and an available chlorine concentration of 50-70ppm to obtain a mixed solution. At 35 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 40 minutes with an ultrasonic power of 1600w, and the extract was collected;

[0086] Step 3, filter the extract obtained in step 2 through a filter cloth, concentrate the filtrate under reduced pressu...

Embodiment 3

[0088] The method for extracting pectin from persimmon pomace of the present embodiment comprises the following steps:

[0089] Step 1. Take 500 grams of persimmon residue, add water to wash and filter, take 10 liters of alkaline electrolyzed water with a parameter pH value of 12, and an oxidation-reduction potential of 700mv, add it to the persimmon residue and soak for 8 hours;

[0090] Step 2. After washing and filtering the persimmon residue soaked in alkaline electrolyzed water in step 1, add 7.5 liters of acidic electrolyzed water with a pH value of 1.5, an oxidation-reduction potential of 1500mv, and an available chlorine concentration of 70-90ppm to obtain a mixed solution. At 50 degrees Celsius, the above-mentioned mixed solution was ultrasonically leached for 50 minutes with an ultrasonic power of 800w, and the extract was collected;

[0091] Step 3, filter the extract solution obtained in step 2, concentrate the filtrate under reduced pressure, freeze and vacuum-dry...