Method for continuous extraction of tannin and pectin from persimmon peel

A technology for persimmon peel and pectin, which is applied in chemical instruments and methods, preparation of sugar derivatives, esterified saccharides, etc., can solve problems such as waste of resources, improve viscosity, reduce production costs, and enhance viscosity. Effect

Active Publication Date: 2017-02-08
北京中农探味科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In China, besides being eaten fresh, persimmons are mainly used for processing persimmons, and a large amount of waste persimmon skins are produced during the processing process, resulting in a great waste of resources.

Method used

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  • Method for continuous extraction of tannin and pectin from persimmon peel
  • Method for continuous extraction of tannin and pectin from persimmon peel
  • Method for continuous extraction of tannin and pectin from persimmon peel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Take 100 grams of persimmon skin, then dry it, pulverize it, and sieve it to obtain 95 grams of raw material powder.

[0040] 2. Add 90 grams of the raw material powder to 1 liter of methanol, centrifuge and filter to obtain the residue I; add 70 grams of the residue I to 0.8 liter of acetone, centrifuge and filter to obtain the residue II; add 60 grams to 0.7 liter of chloroform The residue II is centrifuged and filtered to obtain residue III and supernatant I.

[0041] 3. Concentrate the supernatant I, then dilute the concentrated supernatant solution with distilled water, the volume concentration of the dilution is 9%, add cross-linked polyvinylpyrrolidone to the tannin diluent, and the prepared mass concentration is

[0042] 13%, high pressure homogenization at 55°C for 25min, pressure is 125Mpa, then centrifuged at 15000rpm for 13 minutes, take the precipitate, wash the precipitate twice with an equal volume of ethanol solution with a mass concentration of 70-85...

Embodiment 2

[0050] 1. Take 100 grams of persimmon skin, then dry it, pulverize it, and sieve it to obtain 94 grams of raw material powder.

[0051] 2. Add 100 grams of raw material powder to 1 liter of methanol solution with a mass concentration of 98%, and filter to obtain residue I; add 80 grams of residue I to 0.8 liter of acetone solution with a mass concentration of 97%, and filter to obtain residue II; 70 g of residue II was added to 1 liter of chloroform, and 68 g of residue III and supernatant liquid I were obtained by filtration.

[0052] 3. Concentrate the supernatant I, and then dilute the concentrated supernatant solution with distilled water, the volume concentration of dilution is 10%, add cross-linked polyvinylpyrrolidone to the tannin diluent, the prepared mass concentration is 15%, 60 ℃ Homogenize under high pressure for 30min, the pressure is 150Mpa, then centrifuge at 15000rpm for 15 minutes, take the precipitate, wash the precipitate three times with an equal volume of...

Embodiment 3

[0060] 1. Take 100 grams of persimmon skin, then dry it, pulverize it, and sieve it to obtain 96 grams of raw material powder;

[0061] 2. Add 80 grams of raw material powder to 1 liter of methanol, and filter to obtain residue I; add 64 grams of residue I to 0.8 liter of acetone, and filter to obtain residue II; add 56 grams of residue II to 0.7 liter of chloroform, and filter to obtain 56 g of residue III and supernatant I.

[0062] 3. Concentrate the supernatant I, and then dilute the concentrated supernatant solution with distilled water, the volume concentration of dilution is 8%, add cross-linked polyvinylpyrrolidone to the tannin diluent, the prepared mass concentration is 10%, 60 ℃ Homogenize under high pressure for 20min, the pressure is 100Mpa, then centrifuge at 15000rpm for 10 minutes, take the precipitate, wash the precipitate twice with an equal volume of 70-85% ethanol solution, and then vacuum rotary evaporation at 40°C The ethanol solution with a mass concent...

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Abstract

The invention discloses a method for continuous extraction of tannin and pectin from persimmon peel. The method comprises the following steps: step 1, subjecting the persimmon peel to drying, crushing and sieving so as to obtain raw powder; step 2, subjecting the raw powder to extraction and centrifugation with methanol, acetone and chloroform successively so as to obtain a residue I, a residue II, a residue III and supernatant I, carrying out concentration and rehydration on the supernatant I so as to obtain a dilute tannin solution, adding cross-linking polyvinylpyrrolidone into the dilute tannin solution, carrying out high-pressure homogenization and centrifugation so as to obtain a precipitate, eluting the precipitate by using an ethanol solution with a mass concentration of 70 to 85% and carrying out concentration so as to obtain tannin; step 3, subjecting the residue III to degreasing with petroleum ether so as to obtain a residue IV; and step 5, continuously extracting pectin in the residue IV by using a fluctuating pressure difference method. With the continuous extraction method, three pectins with different average molecular weights and properties can be obtained and are applicable to production of fruit juice or beverages of different types a thickening agent and a stabilizing agent.

Description

technical field [0001] The invention belongs to the technical field of plant extracts, and in particular relates to a method for continuously extracting tannin and pectin from persimmon peel. Background technique [0002] Persimmons (Diospyros kaki Thunb.) are plants of the genus Diospyros (Diospyros L.) in the family Ebenaceae, and are commonly grown in various parts of the country. Persimmon has high nutritional value and is a water-soluble dietary fiber. It has a good laxative effect, and has a good effect on correcting constipation and maintaining normal intestinal flora growth. Chinese medicine believes that it is sweet, cold and slightly astringent, and belongs to the lung, spleen, stomach and large intestine meridians. It has many functions, such as moistening the lungs and resolving phlegm, clearing heat and producing body fluid, astringing the intestines and relieving dysentery, strengthening the spleen and benefiting the stomach, promoting body fluid and moistenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/08C07H1/08C08B37/06
CPCC07H1/08C07H13/08C08B37/0045
Inventor 王志东刘伟林琼张洁孙倩倩吴杰解新方关文强
Owner 北京中农探味科技有限公司
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