FIELD: natural compounds technology. SUBSTANCE: fennel oil is saponified with sodium hydroxide solution and saponified oil is rectified in vacuum into (i) hydrocarbon-fennel intermediate fraction including, besides with hydrocarbons and fenchone, also methylhavicol, anethole, and associated compound with boiling temperatures close to those of methylhavicol and anethole and (ii) anethole fraction. Intermediate fraction is rerectified at residual pressure allowing boiling temperature of liquid not higher than 140 C to yield product with 40-65% methylhavicol, 3-20% trans-anethole, and no more than 0.6% fenchone. EFFECT: reduced losses of associated components of fennel oil with perfumery smell. 2 ex
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