PURPOSE: To obtain the title fat or oil in high yields by treating animal fat or oil with a hydrophilic organic solvent under specific conditions and procedures.
CONSTITUTION: Animal fat or oil (e.g. natural butter oil) is extracted with a hydrophilic organic solvent (e.g. ethanol containing 5vol.% water) above the melting point of the fat or oil to obtain an oil phase from which cholesterol has been removed as refined oil fraction I. Separately, the organic solvent phase obtained by the extraction is cooled to a temp. below the melting point of the fat or oil to crystallize the fat or oil dissolved in the organic solvent phase. The precipitate is separated by filtration and washed with a hydrophilic organic solvent at a temp. below the temp. of crystallization. After the removal of the liquid, it is collected as refined oil fraction II. Then, fraction I and fraction II are mixed and the hydrophilic organic solvent contained in the mixed fat or oil is removed.
HONDA YOSHIHIKO
OKAMOTO KIYOTAKA
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