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Method for preparing purple sweet potato pigment

A purple sweet potato pigment, purple sweet potato technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problem of poor thermal stability and light stability of pigments, unsuitable for large-scale industrial production, complex preparation processes, etc. problems, to achieve significant economic and social benefits, short production cycle, high color price effect

Active Publication Date: 2012-09-19
JIANGXI DANXIA BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color price of the pigment produced by the existing purple sweet potato pigment preparation technology is low, and the thermal stability and light stability of the pigment are not strong, the preparation process is complicated, and the disadvantages are that it is not suitable for large-scale industrial production.

Method used

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  • Method for preparing purple sweet potato pigment
  • Method for preparing purple sweet potato pigment
  • Method for preparing purple sweet potato pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Clean and shred

[0061] Put 5 tons of fresh purple sweet potatoes into the drum washing machine lined with hair brushes at 3 tons per hour, wash them with running water at 6 tons per hour, and shred the cleaned purple sweet potatoes with a shredder.

[0062] (2) Extract and filter

[0063] Put the filaments in a multi-functional extraction tank, extract according to the citric acid aqueous solution of filament: solution = 1:9, the pH of the acidic aqueous solution is 3.5, and collect the purple sweet potato pigment aqueous solution at the liquid outlet of the multi-functional extraction tank. Filter the collected red pigment solution with a diatomaceous earth filter to obtain a clear purple sweet potato pigment solution.

[0064] (3) Column chromatography

[0065] Put the clarified purple sweet potato pigment solution on the HPD-100A macroporous resin adsorption column, the column height is 3m, the diameter is 0.8m, the resin is filled with 300kg, the feed flow r...

Embodiment 2

[0087] (1) Clean and shred

[0088] Put 5 tons of fresh purple sweet potatoes into the drum washing machine lined with hair brushes at 3 tons / hour, wash them with 6 tons / hour of running water, and shred the cleaned purple sweet potatoes with a shredder.

[0089] (2) Extract and filter

[0090] Put the filaments in a multi-functional extraction tank, extract according to the lactic acid aqueous solution of filament: solution = 1:3, the pH of the acidic aqueous solution is 2.0, and collect the purple sweet potato pigment aqueous solution at the liquid outlet of the multi-functional extraction tank. Filter the collected red pigment solution with a diatomaceous earth filter to obtain a clear purple sweet potato pigment solution.

[0091] (3) Column chromatography

[0092] Put the clarified purple sweet potato pigment solution on the ASD-17 macroporous resin adsorption column, the column height is 3m, the diameter is 0.8m, the resin is filled with 300kg, the feed flow rate is 2kg...

Embodiment 3

[0110] (1) Clean and shred

[0111] Put 5 tons of fresh purple sweet potatoes into the drum washing machine lined with hair brushes at 3 tons / hour, wash them with 6 tons / hour of running water, and shred the cleaned purple sweet potatoes with a shredder.

[0112] (2) Extract and filter

[0113] Put the filaments in a multi-functional extraction tank, extract according to the acetic acid aqueous solution of filament: solution = 1:15, the pH of the acidic aqueous solution is 5.0, and collect the purple sweet potato pigment aqueous solution at the liquid outlet of the multi-functional extraction tank. Filter the collected red pigment solution with a diatomaceous earth filter to obtain a clear purple sweet potato pigment solution.

[0114] (3) Column chromatography

[0115] Put the clarified purple sweet potato pigment solution on the LX-60 macroporous resin adsorption column, the column height is 3m, the diameter is 0.8m, the resin is filled with 300kg, the feed flow rate is 10k...

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Abstract

The invention relates to a method for extracting purplish red pigment from natural purple sweet potatoes. The method is characterized by comprising the following steps of: taking fresh purple sweet potatoes as the raw material, carrying out continuous production of cleaning, cutting into shreds, extracting, filtering, carrying out column chromatography, protecting colour, heating, concentrating, freezing, carrying out concentration and ultra-filtration, microencapsulating, spraying, drying, processing in a mixed manner and the like, thereby obtaining purple sweet potato pigment as purplish red (black) powder. The purple sweet potato pigment is more than or equal to 100 in colour value, is high in yield, is light resistant, heat resistant and very steady, and is prior to similar product standard at home and abroad.

Description

technical field [0001] The invention relates to a method for extracting purple pigment from natural purple sweet potatoes, which belongs to the field of deep processing of agricultural products. Background technique [0002] Natural pigments are safe, non-toxic, and naturally bright in color. They are deeply loved by people, especially for the coloring of food, medicine, health care products, and fine chemical products, as well as the huge economic benefits brought by export. Governments and entrepreneurs in various countries are very concerned. The natural purple pigment extracted from purple sweet potato has the characteristics of low cost, stable and reliable quality and so on. However, the pigment produced by the existing purple sweet potato pigment preparation technology has a relatively low color value, and has the disadvantages of poor heat stability and light stability, complex preparation process, and unsuitability for large-scale industrial production. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/00
Inventor 张军兵王建新方军军熊勇邱云
Owner JIANGXI DANXIA BIOTECHNOLOGY CO LTD
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