METHOD OF PREPARING CONCENTRATE OF CAROTINOIDS FROM VEGETABLE MATERIAL Russian patent published in 2003 - IPC

FIELD: natural dyes. SUBSTANCE: method of preparing natural dyes for food industry comprises blanching of raw material at 50-60 C for 2-3 min and separation of juice. Resulting press cake is then dried at temperature not exceeding 60% until moisture no higher than 52% is attained. Dried cake is crushed to particle size 0.2+/-0.05 mm and extracted for 1 h with 80-99% ethanol at 20-60 C and raw material-to-extractant ratio between 1:2 and 1:6. Extract is filtered, solvent is distilled off at temperature no higher than 60 C, residue is separated into two liquid phases: water-soluble (carbohydrate-carotinoid) phase and oil-soluble (lipid-carotinoid) phase. EFFECT: enabled preparation of carotinoid concentrates with elevated biological value and integrated processing of carotin- containing raw material. 1 tbl, 3 ex