NATURAL BLUE ANTHOCYANINE-CONTAINING DYES Russian patent published in 2018 - IPC C09B61/00 A23L5/43 A23G3/34 

FIELD: chemistry.

SUBSTANCE: fraction anthocyanins is isolated at a given pH, based on the differences in charge and polarity of the anthocyanin molecules using ion exchange columns and solvent selected from methanol, acetonitrile, water, and mixtures thereof. A natural green dye containing natural blue anthocyanin-containing dye and a natural yellow dye are also described. An edible product containing natural blue anthocyanin-containing dyes is also described.

EFFECT: invention provides anthocyanin-containing dyes which, in the form of an aqueous solution at pH of 8,0, have a maximum absorption of 615 nm to 635 nm and colour characteristics similar to the synthetic edible blue dye.

15 cl, 10 dwg, 6 tbl