Patent ID: 7767241
Filing Date: 2010-08-03
Classification: A23D,A23G,C11B

Abstract:
1. A dry fractionation method for fat which comprises the steps of: fractionating an interesterified fat or a fractionated crystalline fraction thereof, or an isomerization hydrogenated fat into a crystalline fraction (F) and a liquid fraction (L); melting a part of the crystalline fraction (F) by raising the temperature so that G2U is melted while the glycerides having a higher melting point than G2U are not melted, wherein G denotes a saturated or trans-fatty acid residue and U denotes a cis-unsaturated fatty acid residue; and subjecting the resulting crystalline fraction (F) to a temperature-lowering treatment followed by subjecting to solid/liquid separation to obtain a liquid fraction (FL) and a crystalline fraction (FF), wherein the liquid fraction (L) is further fractionated into a crystalline fraction (LF) and a liquid fraction (LL), followed by partially melting the crystalline fraction (LF) by raising the temperature, and subjecting the resulting fraction (LF) to a temperature-lowering treatment followed by subjecting to solid/liquid separation to obtain a liquid fraction (LFL) and a crystalline fraction (LFF), and wherein temperature-raising and temperature-lowering treatments and, if necessary, collection of the crystalline fraction are repeated.