PROBLEM TO BE SOLVED: To provide an efficient dry discrimination method for oil and fat in which crystallization rate is enhanced while keeping the purity of a crystal portion high.SOLUTION: In the dry discrimination method for oil and fat, dry discrimination is performed while enhancing the crystallization rate by adding a 4-14C free fatty acid to raw material oil and fat. A crystallization accelerator having the 4-14C free fatty acid as an effective ingredient is also provided. The raw material oil and fat is preferably oil and fat other than lauric-based oil and fat. In the triglyceride composition of the raw material oil and fat, the content of symmetric triglyceride represented by SUS (S is saturated fatty acid and U is unsaturated fatty acid) is 10 mass% or more, and the content of tri-saturated triglyceride (SSS) is 0-10 mass%.COPYRIGHT: (C)2013,JPO&INPIT【課題】結晶部の純度を高く保ちながら結晶化速度を高めた、効率的な油脂のドライ分別方法の提供。【解決手段】原料油脂に炭素数4~14の遊離脂肪酸を添加することにより、結晶化速度を速めることによりドライ分別を行う。また、炭素数4~14の遊離脂肪酸を有効成分とする結晶化促進剤。ラウリン系油脂以外の油脂であることが好適であり、上記原料油脂のトリグリセリド組成におけるSUS(Sは飽和脂肪酸、Uは不飽和脂肪酸)で表される対称型トリグリセリド含量が、10質量%以上であること、トリ飽和トリグリセリド(SSS)含量が、0~10質量%であることを特長とする油脂のドライ分別方法。【選択図】なし
