Purple corn pigment extraction technology

An extraction process, purple corn technology, applied in azo dyes, organic dyes, chemical instruments and methods, etc., can solve the problems of immaturity and lack of national standards, and achieve the effect of improving the extraction rate of pigments, protecting the environment and brightening the color.

Inactive Publication Date: 2015-06-17
QINGDAO PENGYUAN KANGHUA NATURAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, this technology in China is still immature, and there is no relevant national standard. However, Japan and the European Union, the market demand countries, have standards for related products. The market urgently needs industrial production methods that meet domestic use or export and meet relevant standards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Solvent extraction: soak in citric acid aqueous solution with pH=2.5, set the extraction temperature at 75°C, and repeat the extraction three times, each extraction time is 1.5 hours for corn husks and 2 hours for corn cob;

[0020] (2) Enzyme treatment: add 100u / g mesophilic amylase, adjust PH=2.5, control temperature at 45°C, and enzymatic treatment for 90min;

[0021] (3) Filtration and extraction: filter the above-mentioned extract under reduced pressure, and extract the filtrate by centrifuging at 2500 r / min for 8 min with a centrifuge;

[0022] (4) Adsorption: use the SP-207 macroporous resin adsorption column with a height of 3m and a diameter of 0.8m on the upper column of the filtrate and 300kg of resin to carry out adsorption at a flow rate of 20M3 / h;

[0023] (5) Concentration under reduced pressure: the above-mentioned purple corn pigment liquid is controlled at a temperature of 60°C and a vacuum degree of -0.18MPa to be concentrated under reduced press...

Embodiment 2

[0034] Example 2: Example 1: The color value was 48.9, the anthocyanin content was 138.2 mg / g, and the pigment yield was 1.8% (g pigment / 100g corn cobs);

[0035] Pigment product quality of the pilot product:

[0036] Example 1: The color value was 20.6, the anthocyanin content was 58.8 mg / g, and the pigment yield was 3.4% (g pigment / 100 g corn cobs).

[0037] Example 2: The color value was 28.7, the anthocyanin content was 63.8 mg / g, and the pigment yield was 3.1% (g pigment / 100 g corn cobs).

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Abstract

The invention relates to a purple corn pigment extraction technology, which is characterized by comprising the following steps: (1) solvent extraction; (2) enzymatic treatment; (3) filtering and extraction; (4) adsorption; (5) reduced pressure condensation; (6) powder (finished product) preparation. In the provided technology, the enzyme species, content, and parameters are effectively controlled, a solvent extraction method is adopted, the soaking time and impurities in pigments are effectively controlled, the production technology is simple, and the extraction rate of pigment is increased.

Description

technical field [0001] The invention belongs to the technical field of pigment extraction, in particular to a purple corn pigment extraction process. Background technique [0002] my country can produce tens of millions of tons of purple corn every year, and millions of tons of purple corn husks can be obtained by peeling them. These skins can produce hundreds of tons of pigments. Therefore, the development of this project can greatly improve the extraction of purple corn pigments after peeling purple corn. Increase the added value of purple corn, improve the economic benefits of farmers, and broaden the product market of the natural pigment industry. The development of this project is of great significance. [0003] At present, this technology in China is still immature, and there are no relevant national standards. However, Japan and the European Union, which are the market demand countries, have relevant product standards. The market urgently needs industrialized producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54C07D311/62
CPCC09B61/00C07D311/62C09B67/0096
Inventor 于帅臧启志展亚倩李进超
Owner QINGDAO PENGYUAN KANGHUA NATURAL PROD
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