| 摘要 |
PURPOSE:To obtain industrially the titled coloring matter useful for food, pharmaceutical preparations, etc. as a stable, high-purity and odorless natural coloring matter, by replacing unsaturated fatty acids contained in an oleoresin with a satd. fatty acid by utilizing an ester exchange reaction. CONSTITUTION:One pt.wt. oleoresin contg. carotenoid is dissolved in 1-10pts. wt. nonpolar solvent such as hexane. Then lipase is used as an auxiliary in a quantity of 50-500 units (international unit) per pts.wt. oleoresin. A satd. fatty acid such as lauric acid or a satd. fatty acid ester such as ethyl myristate is added to the above homogeneous system. Usually, the fatty acid is used in a quantity of no more than 10pts.wt. per pt.wt. oleoresin. To complete the reaction industrially advantageously, small quantities of water and a polyhydric alcohol such as glycerol are added. |
