Comments on IPA MLR PID (PID-05) 1. The dissolution reactor (R-1301) for the ATFD-1333 bottom product should be attached to the bottom of the ATFD-1333 with a small distance piece cum expansion bellow. The distance piece would be a reducer. The dryer bottom has a diameter of 485mm and considering the angle of repose for typical powders, we recommend the cone angle (to vertical) of 30deg. The same cone should accommodate an expansion bellow. 2. For ATFD-1333 bottom discharge, we need “tank above tankâ€ arrangement for transferring the powder from the 1st tank to the 2nd tank for dissolution with acetone MLR. If acetone MLR is directly exposed to the ATFD-1333 interior space, some of the vapors from the ATFD-1333 would condense in the Acetone MLR resulting in higher IPA/Methanol content in Acetone MLR. For further details on the arrangement please refer to the PFD (PFD IA) sent to you by us. 3. The feed line between the separator (V-1332) and the ATFD (1333) will have a liquid seal loop with a loop height equivalent to the pressure drop in the enriching section of the column (C-1302). 4. The overflow tapping (as feed line from separator (V-1332) to the ATFD-1333) should be as close to the separator (V-1332) bottom nozzle as possible. Controls in the PID-05: 1. The flow control loop (FIC-10523, FCV-10523) on the feed line is ok. 2. The control loop (FCV-10530, FIC-10530) on the feed line to the ATFD-1333 has no role to play. 3. The level indicator (LI-10525) on the separator (V-1332) is not needed. 4. Pressure controllers to be used on the steam supply line instead of flow controllers. The pressure controllers will be on the down-streams of the control valve. 5. FI-10591 on the separator (V-1332) vapour line is not needed. 