Patent ID: 6544413
Filing Date: 2003-04-08
Classification: B01D

Abstract:
A simulated moving bed apparatus which comprises:a circulation passage formed by plural unit columns that are connected in series to each other endlessly via a conduit for allowing unidirectional circulation of a circulation fluid through the connected filler unit columns by a circulation pump; an eluent feeding cul-de-sac passage for feeding an eluent to said circulation passage; a feedstock mixture feeding cul-de-sac passage for feeding a feedstock mixture to said circulation passage; a raffinate draw-out cul-de-sac passage for drawing out a raffinate from said circulation passage; an extract draw-out cul-de-sac passage for drawing out an extract from said circulation passage; plural valve devices, each comprising an eluent valve which opens or closes a first communication passage that connects said eluent feeding cul-de-sac passage with said circulation passage, an extract valve which opens or closes a second communication passage that connects said extract draw-out cul-de-sac passage with said circulation passage, a feedstock mixture valve which opens or closes a third communication passage that connects said feedstock mixture feeding cul-de-sac passage with said circulation passage, and a raffinate valve which opens or closes a fourth communication passage that connects said raffinate draw-out cul-de-sac passage with said circulation passage, wherein each of said unit columns is provided with each of said valve devices; and a control device which controls opening and closing motions of said feedstock mixture valve, said eluent valve, said extract valve and said raffinate valve so that a position for introducing said eluent, a position for drawing out said extract, a position for introducing said feedstock mixture and a position for drawing out said raffinate are successively moved in a direction of the fluid flow intermittently.