Extraction method of cochineal red pigment

Cochineal red pigment is a safe natural pigment, and it is of great economic and social significance to study and extract cochineal red pigment.

Cochineal red is a red pigment extracted from female cochineal parasitic on cactus plants, which is obtained by grinding the dry body of female cochineal and extracting it with water. The main component is cochineal acid (also known as carminic acid, which is an anthraquinone derivative). Cochineal insects are native to Central and South America, Mexico and other places. Especially Peru and the Canary Islands. It is estimated that the global output of cochineal raw materials is about 250 ~ 300 tons, and Peru alone accounts for 200 tons. Mexicans have been using wild cochineal insects to extract cochineal red for hundreds of years. /kloc-In the 5th century, the Spanish began to plant cacti in their native land and Canary Islands to improve the red pigment of cochineal insects.

From 65438 to 0997, the Ministry of Agriculture of China successfully introduced Mexican cactus Mibangta, and established large-scale production bases in Beijing and Hainan.

Cui Yi and others studied the extraction and purification technology of cochineal red pigment, and obtained a new technology to prepare cochineal red pigment from cochineal by enzymolysis and column purification. Response surface methodology was applied to the extraction process for the first time, and the optimum extraction conditions were obtained by response surface methodology experiment: extraction temperature was 77℃, solvent concentration was 50%, and extraction time was 65438±0.54h h. The extraction rate can reach 65438 07.62% (cochineal red pigment). Impurity protein was removed by enzymolysis, and cochineal red pigment was enriched and purified by macroporous adsorption resin.