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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 low production cost and inability to filter, and achieve the effects of reducing consumption, saving energy consumption, and increasing economic benefits

Inactive Publication Date: 2007-02-14
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 acid aqueous solution to extract, adopt flocculant to flocculate mucin in the extraction process, effectively solve existing Problems that cannot be filtered by technology, anthocyanins and mucins can be obtained at the same time, with high purity of anthocyanins and low production costs

Method used

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Examples

Experimental program
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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] In the 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: extraction method of sweet potato pigment, 00127847.9 : the ethanol extraction method of purple sweet potato natural red pigment, these methods all adopt organic solvent extraction method, there is certain shortcoming, mainly is that comprehensive cost is high, shows 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 dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00C08H1/00
Inventor 叶小利李坤培
Owner SOUTHWEST UNIV
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