To simplify the structure of an apparatus and reduce costs by installing common solvent charging devices respectively between a separating means and a pressurizing means and between the separating means and a pressure regulating means, and by sharing an entrainer vessel, a washing-solvent vessel and a charge pump.
An entrainer-feed path joins an extraction-separation path between an extraction vessel 3 and a pressurizing pump 2 on the upstream-side through a first branched liquid-feed pipe 11 having a first opening and closing valve 13 from a branched point 10a of a main liquid-feed pipe 10 feeding entrainer from an entrainer vessel 7 equipped with a solvent filter 8 via an entrainer feed pump 9. A washing-solvent-feed path is branched at the branched point 10a from the main liquid-feed pipe 10 in parallel with the entrainer-feed path and joins the extraction-separation path between the extraction vessel 3 and a pressure-regulating valve 5 on the downstream through a second branched liquid-feed pipe 12 having a second opening and closing valve 14. Thus, the entrainer-feed path and the washing-solvent-feed path are respectively connected to the main liquid-feed pipe 10 for common use.
KADORIKU SATORU
TAKAHACHI TADAHIRO
