Extracting essential oils, esp. pigments from citrus fruit - rich in carotenoids, using water miscible and water immiscible solvents

摘要

Process for comprises extracting the residue of a previously extracted citrus fruit with a system of water miscible and water-immiscible solvents. The process is esp. applied to oranges using a mixture of polar and apolar solvents, esp. a mixt. of ethanol and orange terpenes. The colouring matter obtained is used for orange based foods, esp. drinks. The water miscible solvent removes the water, making the pigments more readily extracted by water immiscible solvent.