Mar 16 2017 nbsp 0183 32Tank 6 is empty tanks 1 to 5 are filed with solid and with leached liquid and tank 5 is n contact with freshest solid Fresh solvent is added to tank 1 2 Withdraw the concentrated solution from tank 5 transfer the liquid from tank 4 to tank 5 3 to 4 2 to 3 1 to 2 Add fresh solid to tank 6 3 Refer figB Discard the spent sold frm tank 1