Method for decolouring and purifying pectin

A technology for decolorization and impurity removal and pectin, which is applied in the field of pectin decolorization and impurity removal, can solve the problems of reduced pectin extraction rate, long cycle period, complex process, etc., and achieve the effect of facilitating industrial production, reducing production cost, and simple operation

Inactive Publication Date: 2013-02-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon decolorization is a common method for decolorizing pectin in industry, but it is difficult to remove after adding activated carbon, resulting in high ash content of pectin products, and activated carbon has a certain adsorption effect on pectin, which will reduce the extraction rate of pectin
Some people mentioned the decolorization effect of hydrogen peroxide and macroporous resin in the research on the deco

Method used

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  • Method for decolouring and purifying pectin
  • Method for decolouring and purifying pectin
  • Method for decolouring and purifying pectin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one (see figure 2 ):

[0024] Take the concentrated and alcohol-precipitated flocculent sweet potato pectin, and obtain the flocculent pectin sample after suction filtration (ultimate vacuum degree 0.098Mpa), and add gradients of absolute ethanol, 90% alcohol, 80% alcohol washing solution, alcohol gradient washing is carried out in the order of concentration from high to low. The specific operation is as follows:

[0025] (1) Take the flocculent pectin after alcohol precipitation, add absolute ethanol to the flocculent pectin obtained after suction filtration (ultimate vacuum degree 0.098Mpa), and stir at a speed of 20r / min After 0.5h, flocculent pectin 1 was obtained by suction filtration (ultimate vacuum degree 0.098Mpa);

[0026] (2) Add flocculent pectin 1 obtained in (1), then add 90% alcohol according to the ratio of material to liquid of 1:10, stir at a speed of 20r / min for 0.5h, and then obtain floc pectin 2;

[0027] (3) Add 80% alcohol to the ...

Embodiment 2

[0029] Example 2 (see image 3 ):

[0030] Take the concentrated and alcohol-precipitated flocculent sweet potato pectin, and filter the flocculent pectin sample obtained after suction filtration (ultimate vacuum degree 0.098Mpa), add a gradient of absolute ethanol, 90% alcohol, , 80% alcohol, 70% alcohol, and 60% alcohol washing solution, and carry out alcohol gradient washing in order of concentration from high to low. The specific operation is as follows:

[0031] (1) Take the flocculent pectin after alcohol precipitation, add absolute ethanol to the flocculent pectin obtained after suction filtration (ultimate vacuum degree 0.098Mpa), and stir at a speed of 20r / min After 0.5h, flocculent pectin 1 was obtained by suction filtration (ultimate vacuum degree 0.098Mpa);

[0032] (2) Add flocculent pectin 1 obtained in (1), then add 90% alcohol according to the ratio of solid to liquid of 1:20, stir at a speed of 20r / min for 0.5h, and then obtain floc pectin 2;

[0033] (3)...

Embodiment 3

[0037] Embodiment three (see Figure 5 )

[0038] Take the concentrated and alcohol-precipitated flocculent orange peel pectin, and filter the flocculent pectin sample obtained after suction filtration (ultimate vacuum degree 0.098Mpa), add a gradient of absolute ethanol, 90% Alcohol, 80% alcohol, 70% alcohol washing solution, alcohol gradient washing in order of concentration from high to low. The specific operation is as follows:

[0039] (1) Take the flocculent pectin after alcohol precipitation, add absolute ethanol to the flocculent pectin obtained after suction filtration (ultimate vacuum degree 0.098Mpa), and stir at a speed of 20r / min After 0.5h, flocculent pectin 1 was obtained by suction filtration (ultimate vacuum degree 0.098Mpa);

[0040] (2) Add flocculent pectin 1 obtained in (1), then add 90% alcohol according to the ratio of solid to liquid of 1:15, stir at a speed of 20r / min for 0.5h, and then obtain floc pectin 2;

[0041] (3) Add 80% alcohol to the flo...

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Abstract

The invention relates to a method for decolouring and purifying pectin. In a pectin production process, alcohol solutions in different concentrations (range of concentration of absolute ethyl alcohol is 100-60%) are used for carrying out alcohol gradient washing on flocculent pectin after alcohol precipitation, so that pigments and impurities which are wrapped and adsorbed in the flocculent pectin are dissolved and desorbed in the alcohol solutions with different surface tensions, purity and whiteness of the pectin after gradient washing can be respectively improved by more than 10.1% and 7.06%, and the aim of purifying the pectin is achieved.

Description

1. Technical field: [0001] The invention relates to a method for decolorizing and removing impurities of pectin. 2. Technical background: [0002] Pectin is a kind of hydrophilic vegetable gum, which widely exists in the cell walls of roots, stems, leaves and fruits of higher plants. The main component is galacturonic acid. Pectin has good emulsifying, thickening, stabilizing and gelling properties It has been widely used in food, textile, printing and dyeing, tobacco, metallurgy and other fields. As a water-soluble dietary fiber, pectin has attracted more and more attention from research and processing industries. [0003] Because the plant tissue contains a lot of pigments and impurities, the extracted pectin will inevitably be mixed with pigments and impurities, especially the flocculent pectin substance obtained after the pectin solution extracted from the raw material is concentrated and alcoholized. Pigments and impurities are wrapped and adsorbed in flocculent pecti...

Claims

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Application Information

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IPC IPC(8): C08B37/06
Inventor 罗仓学韩颖卢亚婷
Owner SHAANXI UNIV OF SCI & TECH
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