CO2 RECOVERY METHOD FOR SUPERCRITICAL EXTRACTION

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for recovering a carbon dioxide which is used for a supercritical extraction.;SOLUTION: This recovery apparatus (1) is constituted to provide a pressurized carbon dioxide, a waste material generated in extraction process and in some cases a process flow (61) including at least one kind of cosolvent from a supercritical extraction process (60), to reduce a pressure of the process flow below the critical pressure, to exhaust a low pressure carbon dioxide steam (66), to form a two-phases mixture by cooling the process flow, to divide into a process liquid (71) including the cosolvent and a process steam phase flow (72). The recovery apparatus is constituted to collect the process liquid, to filtrate the process steam phase flow (72), to remove a particulate material and a residual cosolvent, to form a refined carbon dioxide steam flow (90) by passing the filtrated process steam flow (81) through an absorber (85) and removing impurities of trace amount, and to dry and remove the residual steam.;COPYRIGHT: (C)2004,JPO