PURPOSE: To extract and separate a valuable substance such as cholesterin, etc., from a fat and oil raw material in high purity without requiring after- treatment, by saponifying a fat and oil raw material with an alkali, extracting valuable substances such as cholesterin, etc., from a saponified material with a solvent and extracting the solvent at a specific carbonic acid gas density.
CONSTITUTION: A fat and oil raw material is saponified with an alkali to give a saponified material 1, which is fed to a mixer settler 2. A solvent is sent from a solvent tank 3 to the mixer settler by a feed pump 4, the saponified material is blended with the solvent, valuable substances such as cholesterin, etc., are extracted with the solvent, the mixed slurry is separated by a centrifugal separator 5, an extracting solvent 5a is fed to a carbonic acid gas extracting device 10 and an extraction residue 5b is discharged and recovered. Then, the extracting solvent 5a is brought into contact with a carbonic acid gas having 0.1W0.35g/cm3 density sent from a carbonic acid gas feeder 6 in the carbonic acid gas extracting device 10 and only the solvent is extracted so the valuable substances are extracted and separated from the fat and oil material.
MATSUZAKI HARUMI
TAKAHASHI SANKICHI
YOSHIDA MASAHIRO
TAKAKUSAKI TSUNEHIKO
SATO JOSHIRO
