The present invention provides a method for producing a saturated fatty
acid and an unsaturated fatty acid, which comprises adding and mixing a
polyglycerol ester of a fatty acid to a raw fatty acids mixture, cooling
the resultant mixture to deposit crystals, and fractionating the saturated
fatty acid and the unsaturated fatty acid, wherein a cooling procedure is
performed at a cooling rate of 4.degree. C./h or less when a
supersaturation ratio is 60% or more and said cooling rate is varied
during the cooling, and a glycerides mixture obtained from the
fractionated unsaturated fatty acids.
According to the present invention, a saturated fatty acid and an
unsaturated fatty acid in a raw fatty acids mixture can be separated
easily and efficiently by a dry fractionation process.
