PURPOSE: To extract and separate an objective substance with high efficiency, by enabling the change-over of extraction tanks and continuously extracting a substance to be extracted while independently controlling the pressures and temps. in the extraction tanks and a separation tank.
CONSTITUTION: After an objective substance was introduced into an extraction tank 27A, the fluid of a fluid source 1 is allowed to gradually fill the whole of the system through pipings 2, 3, 6, 14. Next, a liquefier 53 is operated to liquefy the fluid. Subsequently, the substance to be extracted, which was extracted in the extraction tank 27A, is mixed with an super-critical fluid to be sent to a separation tank 34 where the fluid is separated from the extracted substance to be sent to a gassification tank 48. The fluid issued from the gassification tank 48 is passed through the liquefier 53 to be perfectly liquefied and sent to a recirculation pump 10 to be recycled and utilized. Further, the extraction time of the objective substance in the extraction tank or the extraction amount of the objective substance in the separation tank is set as a change- over condition and the change-over of extraction tanks 27A, 27B is performed by a change-over control mechanism consisting of automatic valves 19A, 19B, 28A, 28B.
YOSHIDA MASAHIRO
TAKAKUSAKI TSUNEHIKO
SATO JOSHIRO
TAKAHASHI SANKICHI
MATSUZAKI HARUMI
