| 摘要 |
PROBLEM TO BE SOLVED: To obtain a vegetable colorant which does not contain impurities such as an odor component or an oil or fat and does not exhibit decoloration nor disocoloration by mixing a vegetable colorant oleoresin with a medium-chain satd. fatty acid triglyceride and bringing the resultant mixture into contact with carbon dioxide in the supercritical state. SOLUTION: A vegetable colorant oleoresin is mixed with about 50-500wt.% medium-chain satd. fatty acid triglyceride to sufficiently reduce the viscosity and then is brought into contact with carbon dioxide in or near the supercritical state at 60 deg.C or lower under 400atm. or lower to conduct extraction. Thus, impurities, such as odor component or an oil or fat, contained in the vegetable colorant are extracted and eliminated together with triglyceride, thus giving a deodorized and purified vegetable colorant. |
