Method for producing citrus-derived nobiletin and tangeretin-containing material, and nobiletin and tangeretin-containing material obtained by the method

摘要

It is an object of the present invention to provide a method for producing a fraction containing nobiletin and tangeretin at a high concentration, which is excellent in safety, economy and industrialization. The purpose is (1-1) a step of obtaining a hydrothermally treated product by treating citrus with hot water; (1-2) a step of obtaining a dried product by drying the hydrothermally treated product; 3) A step of obtaining a nobiletin and tangeretin lysate by treating the dried product with a solvent that is soluble in nobiletin and tangeretin; (3) concentrating and / or drying the nobiletin and tangeretin lysate to concentrate nobiletin and tangeretin. And (4) a method for producing nobiletin and a tangeretin-containing product and a method thereof, comprising the step of obtaining the nobiletin and tangeretin-containing product as an insoluble component by treating the nobiletin and tangeretin concentrate with a dilute alkali. This is solved by the high concentration of nobiletin and tangeretin produced.