Extracting process for purple sweet potato antocynidin and mucin

An extraction process, sweet potato flower technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of inability to filter, low production cost, etc., and achieve energy saving, low production cost, and high pigment purity Effect

Inactive Publication Date: 2004-12-15
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to aim at the above-mentioned shortcoming that prior art exists, propose a kind of extraction process of anthocyanidin and mucin in purple sweet potato, adopt acidic solution to extract, adopt f...

Method used

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Examples

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Effect test

Embodiment 1

[0031] After the fresh sweet potatoes are cleaned, they are pulverized into a slurry with a pulverizer and injected into the pool to ensure that the volume ratio of the potato residue and the liquid in the slurry is 1: 5-8 and then according to the volume of the slurry: sulfuric acid (10%) = 95 (mL): 5 ( mL) add sulfuric acid, stir and extract for two hours and then stand still; the supernatant is transferred to another pool. Then add 0.5% sulfuric acid in the precipitation according to the volume of precipitation: 0.5% sulfuric acid volume = 1: 5-8, stir and leach for one hour and then stand still, and the supernatant is merged into the supernatant for the first time. Repeat the leaching three times, and combine the three supernatants. Among them, the potato residue is used to produce starch (purple) and fiber of sweet potato, and develop functional health food. Add 5% carboxymethylcellulose flocculant to the supernatant, stir evenly and then stand still for two hours. Since...

Embodiment 2

[0032] Embodiment 2: After the fresh sweet potato is cleaned, grind it into a slurry with a pulverizer and inject it into the pool, ensure that the volume ratio of the potato residue and the liquid in the slurry is 1:5-8, and then add acidic methanol according to the volume of the slurry: acidic methanol=1:1 , stirred and leached for two hours and then stood still; the supernatant was transferred to another pool. Then add 0.5% sulfuric acid in the precipitation according to the volume of precipitation: 0.5% sulfuric acid volume = 1: 5-8, stir and leach for one hour and then stand still, and the supernatant is merged into the supernatant for the first time. Repeat the leaching three times, and combine the three supernatants. Among them, the potato residue is used to produce starch (purple) and fiber of sweet potato, and develop functional health food. Add 5% mucopolysaccharide-type YX-1 or YX-2 flocculants to the supernatant, stir evenly and then stand still for two hours. Sin...

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Abstract

The extraction process of purple sweet potato anthocynidin and mucin includes the following steps: washing fresh or dry sweet potato, crushing, extracting in acid aqua, precipitation to eliminate starch and dregs, precipitating the supernatant with edible flocculant to obtain protein and polysaccharide, filtering, column adsorption of the filtrate, elution with acid methanol solution, decompressio concentration, and vacuum drying or spray drying to obtain product. Adopting acid solution extraction and flocculating mucinw ith flocculant to solve the filtering problem effectively, so that the present invention makes it possible to obtain anthocynidin and mucin simultaneously and has high anthocynidin purity and low production cost.

Description

technical field [0001] The invention belongs to the technical field of extracting organic dyes from natural raw materials, in particular to a process for extracting purple sweet potato anthocyanidin and mucin. Background technique [0002] Prior art There are methods for extracting pigments or anthocyanins from natural raw materials reported in patent literature, such as patent application 02109157. 9: Calendula pigment extracted from marigold and its extraction method, 02110033. 0: sweet potato pigment Extraction method, 00127847.9: Ethanol extraction method of natural red pigment of purple sweet potato. These methods all use organic solvent extraction method, which has certain shortcomings, mainly because of high comprehensive cost, which is manifested in the following aspects: [0003] A, the consumption of organic solvent (ethanol) is large; [0004] B. Before the organic solvent extract is put on the column, the organic solvent in the solution must be removed by vacuum...

Claims

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Application Information

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IPC IPC(8): C08H1/00C09B61/00
Inventor 叶小利李坤培
Owner SOUTHWEST UNIVERSITY
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