A kind of method for purifying cochineal pigment resin
A technology of cochineal red and pigment, which is applied in the field of natural pigment purification, can solve problems such as complicated process, and achieve the effects of simple and easy process, easy-to-obtain raw materials and low price.
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Embodiment 1
[0042] (1) Preparation of cochineal red pigment extract: take 50 g of dried cochineal, add 500 mL of ultrapure water, extract at 75° C. for 1.5 h, 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 ...
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 Carmine pigment concentrate;
[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 in ethanol...
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