| 摘要 |
PURPOSE:To recover and reutilize an eluate and to prevent the lowering of the concn. of a raffinate solution by recovering the eluate by the eluate recovery valve provided at the outflow position of the raffinate solution. CONSTITUTION:A stock solution is introduced into an adsorbing tower C1 from the stock solution inflow pipe f1 provided to the top part of the adsorbing tower C1 and a raffinate solution pooor in adsorbability is taken out of the raffinate outflow pipe r4 provided to the tail of an adsorbig tower C4 and the water of an eluate is introduced into an adsorbing tower C5 from the eluate inflow pipe 5 at the top part of the tower C5 while a product solution rich in adsorbability is taken out of the tail of the 8-th adsorbing tower. The shut-off valve V4 between the adsorbing towers C4, C5 is closed to block the flow of the solution. After a predetermined time, the solution moves through a stock solution inflow pipe (f), a raffinate solution outflow pipe (r), inflow and outflow ports (d), (e) and a valve V one by one in a flow direction. After the movement to the inflow and outflow ports (d), (e), the eluate recovery valve (a) provided to the matrix pipe of the outflow pipe (r) is closed and a raffinate solution recovery valve (b) is closed to recover a low concn. raffinate solution and the dilution by the eluate is prevented and the raffinate solution is reutilized as the eluate. |
