| 摘要 |
PURPOSE:To obtain carotenoid dyestuff free from smell useful for foods, table luxuries, drugs, etc., by treating carotenoid-containing oleo-resin an alkali, adding a mineral acid to the treated material, adding uniformly a purified edible oil to it, distilling it. CONSTITUTION:Carotenoid-containing oleo-resin is treated with an alkali such as caustic soda, caustic alkali, etc. to remove fat components, a system having finished the reaction is cooled approximately to room temperature, a mineral acid such as dilute sulfuric acid, hydrochloric acid, phosphoric acid, etc. is added to the system, so that fatty acid salts formed by saponification reaction are restored to free fatty acids. By these operation, a carotenoid dyestuff is obtained in a state dissolved or dispersed in the fatty acid, and a smell substance or the formed fatty acids are removed from the system by molecular distillation, to give the carotenoid dyestuff. In order to prevent decomposition, etc. of the dyestuff caused by burning due to lack in fluidity of substances to be distilled, pref. a purified edible oil is previously added to the substances and they are distilled.
|
