| 摘要 |
A simulated moving bed separation system is provided, in which a fluid circulation flow path can be washed for a short time. This system is provided with a circulation flow path having two or more packed beds connected in series and endlessly to each other, with desorbing-charging inlet, extract draw-out port, feedstock introducing port and raffinate draw-out port arranged in this order in the direction of flow of a circulation liquid, which are allowed to intermittently shift in the direction while being kept in this order, and with packed bed-washing pipes, valves and pumps. A desorbing liquid is introduced through the desorbing liquid introducing port into the circulation flow path. An extract rich in a strongly adsorptive constituent to be separated is drawn out through the extract draw-out port. A feedstock containing strongly and weakly adsorptive constituents is introduced through the feedstock introducing port into the circulation flow path, and a raffinate rich in a weakly adsorptive constituent is drawn out through the raffinate draw-out port.
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