The continuous strategy continues with the following steps: When the amount of reflux in the column is sufficient to be able to withdraw all products, the withdrawal at the respective product draws D, S1, and S2 is activated by opening the corresponding valves. Because the reflux establishes very quickly, this corresponds to a simultaneous opening of all product valves as soon as the level control for the condenser is activated. The operation of the column continues without any additional changes. As all product streams reach their desired specifications, the start-up process is complete. The actions included in the start-up processes are performed using a combination of manual adjustments and the Event Scheduler in Aspen HYSYS, which allows to define sequences of operations, that are activated, when specified conditions are met.