PURPOSE: To obtain a powder fat or oil excellent in storage stability by forming a starting material contg. a fat or oil into a melt having water and/or an org. solvent homogeneously dispersed therein in an extruder, and immediately ejecting the melt.
CONSTITUTION: A starting material contg. a fat or oil is melted in the presence of water and/or an org. solvent under a high pressure at a high temp. in an extruder to form a melt having the coexistent water and/or org. solvent homogeneously dispersed therein in a liquid state. Immediately thereafter, the melt is ejected from a die into a zone wherein an atmospheric or lower pressure is maintained to explosively evaporate the coexistent water and/or org. solvent while solidifying the melt of the starting material to form a surface film. Thus, a powdery fat or oil wherein the surface of the particles are smooth is obtd. The surfaces of the particles are smoother than those of particles prepd. by spray drying, freeze drying or the like. This powder is a stabilized fat or oil powder wherein the fat or oil is homogeneously and stably entrapped in the starting material.
MURAKAMI TETSUYA
KORIYAMA TAKESHI
HATA KAZUHIKO
