PROBLEM TO BE SOLVED: To provide a fractionation method which is more efficient and industrially suitable for recovering oils/fats having a low XXX triglyceride content but a high X2U triglyceride content from oils/fats containing X2U triglycerides (X is a saturated fatty acid residue and U is an unsaturated fatty acid residue) and having a high XXX triglyceride content (X is a saturated fatty acid residue).SOLUTION: The method for fractionating oil and fat, is characterized in that an oil/fat having a triglyceride content of 60 wt% or more and including, among all triglycerides, 10-70 wt% of an XXX triglyceride and 10-50 wt% of a X2U triglyceride, is mixed with a fatty acid lower-alkyl ester a raw material for crystallization is prepared, the raw material having a 10-50 wt% triglyceride content and a 50-80 wt% fatty acid lower-alkyl ester content the raw material for crystallization is heat-melted and subsequently cooled a crystal precipitate is formed and the precipitate is fractionated, resulting in a liquid part (olein part) having a high X2U triglyceride content.COPYRIGHT: (C)2013,JPO&INPIT【課題】X2U型トリグリセリド(Xは飽和脂肪酸残基、Uは不飽和脂肪酸残基)を含み、XXX型トリグリセリド含量(Xは飽和脂肪酸残基)が高い油脂から、XXX型トリグリセリド含量が低く、X2U型トリグリセリドに富んだ油脂を回収するための、より効率的で工業的に適した分別方法を提供することである。【解決手段】トリグリセリド含量が60質量%以上であって、全トリグリセリド中にXXX型トリグリセリドを10~70質量%及びX2U型トリグリセリドを10~50質量%含む油脂と、脂肪酸低級アルキルエステルとを混合し、トリグリセリド含量が10~50質量%、脂肪酸低級アルキルエステル含量が50~80%質量%である晶析原料を調製し、該晶析原料を、加熱融解し、次いで冷却して結晶を晶析させ、次いで分別することにより、X2U型トリグリセリドに富んだ液体部(オレイン部)を得ることを特徴とする油脂の分別方法。【選択図】なし
