Method of producing purpureal sweet potato haematochrome

A production method, sweet potato red technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of increasing the cost of subsequent processes, and achieve the effects of physiological function protection, prolonging service life, and high extraction rate

Inactive Publication Date: 2006-09-20
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum concentration or spray drying is used only to concentrate or dry the product, which makes the pigment easy to degrade under high temperature conditions. Due to the large consumption of energy, the cost of subsequent processes is increased.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Extract with 0.1% citric acid aqueous solution, the extraction temperature is 10°C, the time is 0.5h, the liquid-solid ratio is 1:1, and the number of extraction stages is 2 times;

[0022] 2. After cooling and centrifuging the extract, inactivate the enzyme, the temperature for inactivating the enzyme is 80°C, and the time is 1min, the improvement rate reaches 95%;

[0023] 3. The extract is separated and purified through a microfiltration membrane. The membrane material is a ceramic membrane with a pore size of 10nm, an operating pressure of 0.5MP, an operating temperature of 20°C, and a flux of 15ml / min;

[0024] 4. Pass the primary separation and purification of the pigment solution through the nanofiltration membrane, the membrane material is ceramic membrane, the molecular weight cut-off is 50 Daltons, the operating pressure is 5MP, the operating temperature is 30°C, the flux is 100ml / min, and the concentration ratio can reach 7 times, color price is 25;

[00...

Embodiment 2

[0028] 1. Extract with 0.2% citric acid aqueous solution, the extraction temperature is 30°C, the time is 5h, the liquid-solid ratio is 1:2.5, and the number of extraction stages is 2 times;

[0029] 2. Cool the extract and centrifuge to inactivate the enzyme. The temperature for inactivating the enzyme is 120°C and the time is 5 minutes. The extraction rate reaches 98%;

[0030] 3. Separation and purification of the extract through a microfiltration membrane, the membrane material is polyamide, the membrane pore size is 100nm, the operating pressure is 2.5MP, the operating temperature is 40°C, and the flux is 50ml / min;

[0031] 4. Pass the primary separation and purification of the pigment solution through the nanofiltration membrane, the membrane material is ceramic membrane, the molecular weight cut-off is 80 Daltons, the operating pressure is 4MP, the operating temperature is 45°C, the flux is 100ml / min, and the concentration ratio can reach 6 times, color value is 30;

...

Embodiment 3

[0035] 1. Extract with 0.3% citric acid aqueous solution, the extraction temperature is 70°C, the time is 10h, the liquid-solid ratio is 1:5, and the extraction stages are 2 times;

[0036] 2. After cooling and centrifuging the extract, inactivate the enzyme, the temperature for inactivating the enzyme is 150°C, the time is 10min, and the extraction rate is 96%;

[0037] 3. The extract is separated and purified through a microfiltration membrane. The membrane material is polyamide, the membrane pore size is 1200nm, the operating pressure is 5MP, the operating temperature is 40°C, and the flux is 80ml / min;

[0038] 4. Pass the primary separation and purification of the pigment solution through the nanofiltration membrane, the membrane material is ceramic membrane, the molecular weight cut-off is 100 Daltons, the operating pressure is 4MP, the operating temperature is 45°C, the flux is 100ml / min, and the concentration ratio can reach 6 times, color price is 25;

[0039] 5. Conc...

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Abstract

This invention discloses a safe and highly efficient method for extracting purple sweet potato color with a high purity, which comprises the steps of: beating fresh purple sweet potatos, extracting with citric acid aqueous solution, cooling the extraxted solution, centrifuging, inactivating enzymes, performing a first time separation and purification with a microfiltration membrane, concentrating with a nanofiltration membrane, coupling the concentrated solution with resin, performing a second time separation and purification, and concentrating in vacuum to obtain the final product. The use of nanofiltration membrane and the coupling of the membrane with the resin can elongate the service life of the resin as well as raise the adsorption efficiency of the resin. The use of nanofiltration membrane for concentrating the color solution can effectively reduce the manufacturing cost and prevent degradation of the color solution at a high temperature, thus can protect the physiological functions of the color from being damaged.

Description

technical field [0001] The invention relates to a production method for preparing purple sweet potato red pigment, which belongs to the technical field of processing and application of medicine, food, health food and cosmetics. Background technique [0002] With the improvement of people's living standards, the requirements for food color, aroma and taste are getting higher and higher. Therefore, synthetic pigments are widely added to food to increase the variety of food and improve people's appetite. However, because the harm caused by artificial synthetic pigments to the human body has attracted more and more people's attention, many artificial synthetic pigments have been banned from use or even stopped production. Therefore, the extraction of natural pigments from plants has aroused people's interest again, and its development and utilization have become a major research hotspot. The main reason is that natural pigments are directly derived from animals, plants and micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 高彦祥许正虹李媛媛刘璇
Owner CHINA AGRI UNIV
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