Patent ID: 7727569
Filing Date: 2010-06-01
Classification: C11B,C11C

Abstract:
1. A dry fractionation method of fat or oil which comprises the steps of: fractionating fat or oil (A) containing G2U and GU2 through crystallization/solid-liquid separation into a cake of a crystal fraction of concentrated G2U (AF) and a liquid fraction of concentrated GU2 (AL), crushing the crystal fraction (AF) and mixing the crushed fraction with liquid G2U-containing fat or oil (B) whose GU2 concentration is lower than that of the liquid fraction (AL), and then separating the mixture into a crystal fraction (BF) and a liquid fraction (BL), wherein G represents a saturated or trans acid form fatty acid residue, U represents a cis form unsaturated fatty acid residue, G2U represents a triglyceride of two G-residues and one U-residue bonded together, and GU2 represents a triglyceride of one G-residue and two U-residues bonded together, and wherein the fat or oil (A) is vegetable butter or a middle-melting point fraction thereof, interesterified oil obtained by selectively introducing a saturated fatty acid to 1,3-positions of fat or oil which is rich in oleic acid at the 2-position, or isomerized hydrogenated oil.