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Method for extracting pectin from pepper skin slag

A technology of chili peel and pectin, which is applied in the field of plant extracts, can solve the problems of environmental pollution and waste of resources, and achieve the effects of reducing environmental hazards, improving quality, and having obvious effects

Inactive Publication Date: 2014-09-03
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The chili peel dregs used in the present invention is the by-product of capsicum oleoresin extracted from the pepper peel, which is rich in nutrients. However, in my country, a large amount of chili peel dregs are directly discarded as industrial waste or used as feed, which wastes resources and pollutes. surroundings

Method used

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  • Method for extracting pectin from pepper skin slag
  • Method for extracting pectin from pepper skin slag
  • Method for extracting pectin from pepper skin slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Mix the chili peel dregs with water at a mass ratio of 1:20, add hydrochloric acid to adjust the pH to 1.5, raise the temperature to 90°C, stir for 2 hours, filter with suction to obtain the pectin extract, adjust the pH to 3.0 with sodium hydroxide, and dissolve the activated carbon Fully stir and mix with the pectin extract according to the mass percentage concentration (w / v) of activated carbon in the mixed solution as 1.0%, decolorize at a temperature of 80°C for 60min, and pump it in a Buchner funnel cushioned with diatomaceous earth while it is hot Filtrate, concentrate the filtrate to 1 / 3 of the original volume under a vacuum condition of -0.90Mpa~0.95Mpa, add ethanol solution to the obtained concentrated solution to make the volume fraction 65%, and let it stand at a temperature of 15°C After 3 hours, centrifuge to get the precipitate, wash it for 40 minutes with ethanol aqueous solution with the volume fraction of 75% and 85% respectively according to the ratio o...

Embodiment 2

[0033] Mix the chili peel dregs with water at a mass ratio of 1:40, add citric acid to adjust the pH to 4.0, raise the temperature to 70°C, stir for 3 hours, and filter to obtain pectin extract. The vacuum degree is -0.90Mpa~0.95Mpa Concentrate to 1 / 4 of the original volume under the vacuum conditions, fully stir and mix the hydrogen peroxide and the concentrated pectin extract according to the volume percentage (v / v) of hydrogen peroxide as 10%, and decolorize at 60°C for 24 hours. Collect the filtrate by filtration, add isopropanol solution to the resulting filtrate to make the volume fraction 70%, let it stand at 4°C for 6 hours, centrifuge to obtain a precipitate, and use an isopropanol aqueous solution with a volume fraction of 85% according to the solid-liquid mass ratio The ratio of 1:20 was washed for 30 minutes, and the obtained precipitate was dried at 50°C for 12 hours to obtain a pectin product with a yield of 8.65%, a purity of 72%, and a degree of esterification o...

Embodiment 3

[0035] Mix the chili peel dregs with water at a mass ratio of 1:50, add sulfuric acid to adjust the pH to 0.5, raise the temperature to 60°C, stir for 1 hour, filter with suction to obtain the pectin extract, adjust the pH to 3.0 with sodium hydroxide, and dissolve the activated carbon Fully stir and mix with the pectin extract according to the ratio of 0.8% mass percentage concentration (w / v) of activated carbon in the mixed solution, decolorize at 60°C for 90min, and pump while hot in a Buchner funnel cushioned with diatomaceous earth Filtrate, concentrate the filtrate to 1 / 4 of the original volume under a vacuum condition of -0.90Mpa~0.95Mpa, add ethanol solution to the obtained concentrated solution to make the volume fraction 45%, and let it stand at a temperature of 25°C After 6 hours, centrifuge to obtain a precipitate, and then wash it for 15 minutes with methanol aqueous solution with a volume fraction of 75% according to the ratio of solid to liquid mass ratio of 1:5,...

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Abstract

The invention belongs to the technical field of plant extracts and particularly relates to a method for extracting pectin from pepper skin slag. The method comprises the process flows: acid-extracting, discoloring, alcohol-precipitating, purifying and drying. The method disclosed by the invention not only can adopt inorganic acid, but also can adopt organic acid to extract, and the organic acid is used for overcoming a pollution problem of inorganic acid extraction on environment; hydrogen peroxide or active carbon is adopted to discolor, so that a problem that the pepper pectin extracting liquor is dark in color and difficult to discolor is solved; alcohol, isopropanol, methanol, acetone and ethyl acetate are used for purifying to sufficiently prepare the pectin with higher purity. According to the method disclosed by the invention, process operation conditions are easy to control, purifying method is simple, pectin yield averagely can reach 9.5%, content of galacturonic acid is not less than 65%, and the pectin belongs to high-ester pectin.

Description

technical field [0001] The invention belongs to the technical field of plant extracts, and in particular relates to a method for extracting pectin from pepper dregs. Background technique [0002] Capsicum, native to Central and South America, belongs to the genus Capsicum in the family Solanaceae. It has the effects of improving the color and taste of dishes, increasing appetite, dispelling cold and relieving the exterior, and activating collaterals and promoting muscle growth. my country's chili planting area ranks first in the world, and there are more than 20 provinces in the country. As an indispensable flavoring agent in the diet, chili is mainly used for fresh food, and some simple processing is also carried out, such as chili sauce, chili oleoresin, etc. Capsicum oleoresin is a mixture of capsicum pigment and spicy substances, which is mainly used as a food flavoring agent and is often obtained by soaking in organic solvents. There will be a lot of residues in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/06
Inventor 高彦祥魏桐王磊袁芳
Owner CHINA AGRI UNIV
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