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Method for purifying cochineal red pigment resin

A technology of carmine and cochineal, applied in the field of natural pigment purification, can solve problems such as complex process, and achieve the effect of simple process, easy-to-obtain and low-cost raw materials

Active Publication Date: 2014-01-29
PIONEER HERB IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some techniques for purifying carmine pigment at present, but most of the techniques are more complicated, such as Chinese patent CN01802714 (2001)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of cochineal red pigment extract: Take 50g of dried cochineal, add 500mL of ultrapure water, extract at 75°C for 1.5h, filter, and recover the filter residue. The filter residue was extracted three more times by the above method, and the above filtrates were combined and concentrated by a rotary evaporator to obtain a concentrated solution for future use.

[0043] (2) Soak the D-101 resin in 95% ethanol for 24 hours, then wash it with ultrapure water until there is no alcohol smell, then take 20 mL to fill the column.

[0044] (3) Adjust the concentrated cochineal red pigment solution obtained above to a pH value of 3, let it rest for 2 hours, filter, and take the filtrate for later use.

[0045] (4) Take 2 times the resin volume of the pretreated cochineal red pigment concentrate, and pass it through the resin column at 3 times the resin volume / h.

[0046] (5) After the D-101 resin adsorbs cochineal red pigment, it is 4 times of resin volume / h to wash ...

Embodiment 2

[0049] A method for purifying carmine pigment resin, comprising the following steps:

[0050] (1) Preparation of cochineal red pigment extract: add dried cochineal into 8 times the weight of ultrapure water, extract at 60°C for 2 hours, filter, recover the filter residue, add the filter residue to ultrapure water and extract under the same conditions 3 times, all the filtrates were combined to obtain the carmine extract;

[0051] (2) Pretreat the cochineal extract to obtain a cochineal concentrate: Concentrate the cochineal extract with a rotary evaporator, adjust the pH to 3, let it stand for 2.5 hours, and filter to obtain the filtrate It is carmine concentrated solution;

[0052] (3) Adsorb the cochineal red pigment concentrated solution through the macroporous resin to obtain the macroporous resin adsorbed with cochineal red pigment. The macroporous resin is commercially available D-101 resin, and D-101 resin is used before using 95vol% Soak in ethanol for 24 hours, then...

Embodiment 3

[0057] A method for purifying carmine pigment resin, comprising the following steps:

[0058] (1) Preparation of cochineal red pigment extract: add dried cochineal into 10 times the weight of ultrapure water, extract at 70°C for 1.5h, filter, recover the filter residue, add the filter residue to ultrapure water under the same conditions Extract 3 times, combine all filtrates, obtain cochineal red pigment extract;

[0059] (2) Pretreat the cochineal pigment extract to obtain the carmine concentrated solution: concentrate the cochineal pigment extract with a rotary evaporator, adjust the pH value to 3, let it stand for 3 hours, and filter, and the obtained filtrate is It is carmine concentrated solution;

[0060] (3) Adsorb the cochineal red pigment concentrated solution through the macroporous resin to obtain the macroporous resin adsorbed with cochineal red pigment. The macroporous resin is commercially available D-101 resin, and D-101 resin is used before using 95vol% Soak ...

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Abstract

The invention relates to a method for purifying cochineal red pigment resin. The method comprises the following steps: (1) preparing a cochineal red pigment extracting solution; (2) pretreating the cochineal red pigment extracting solution so as to obtain a cochineal red pigment concentrated solution; (3) adsorbing the cochineal red pigment concentrated solution by macroporous resin so as to obtain the macroporous resin adsorbing cochineal red pigment; (4) eluting the macroporous resin adsorbing the cochineal red pigment, and collecting an eluant; and (5) concentrating and drying the eluant so as to obtain the cochineal red pigment. Compared with the prior art, the method has the advantages that the technology is simple and practicable, the macroporous resin can be repeatedly used and is environmentally-friendly and energy-saving, raw materials are easy to obtain and low in cost, the content of cochineal red acid in the cochineal red pigment resin obtained by the method is higher than 55wt%, and the industrial requirements of ordinary food and the like can be satisfied.

Description

technical field [0001] The invention belongs to the field of natural pigment purification, and relates to a purification method of natural pigment extracts, in particular to a purification method of cochineal red pigment resin. Background technique [0002] Carmine pigment is a pigment extracted from cochineal insects growing on cactus. It is an anthraquinone natural pigment with a pink to purple hue. It is an excellent colorant for food, cosmetics, medicine and textiles, and is the only one A natural pigment approved by the FDA for use in food, medicine and cosmetics [Liu Xijian, et al. Ion Exchange and Adsorption, 2012, 28(1): 78-85]. Carmine can also be used in the treatment of AIDS, cancer, etc. [Ayuko W O.EP0499467.1992-08-19.]. [0003] my country's carmine is mainly imported from Peru. At present, some cochineal breeding bases have been established in Yunnan, Sichuan and other places, but the domestic carmine industry is still in its infancy, especially for the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
Inventor 刘锡建肖稳发王远强谷里鹏李荣秋李健蒋文斌谢燕婷
Owner PIONEER HERB IND CO LTD
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