METHOD FOR PRODUCING CONCENTRATE OF CONJUGATED FATTY ACID

摘要

It is intended to provide a simple and inexpensive method capable of producing a concentrate in which a given unsaturated fatty acid is concentrated from a mixture, from which it has been conventionally difficult to concentrate. The invention provides a method for producing a concentrate in which a desired isomer (a) is concentrated from a conjugated fatty acid mixture (A), characterized by comprising the steps of: obtaining a mixed solution in which the conjugated fatty acid mixture (A) and one or more kinds of unsaturated fatty acids (B) are mixed and the isomer (a) is dissolved; crystallization treatment in which a crystal rich in the isomer (a) is deposited or a crystal poor in the isomer (a) is deposited from the mixed solution; and solid-liquid separation treatment for obtaining the crystal rich in the isomer (a) or for obtaining a solution rich in the isomer (a) by removing the crystal poor in the isomer (a).