Table 1 shows the effect of distillation method on starting
time of distillation (i.e. come up time), ethanol distillation
duration, total process time and speed of ethanol distillation.
As the data shows, by the time the ethanol distillation with HD
started (i.e. about 53min), almost half of the distilled product
had been collected with OAHD. For the same amount of distilled
product recovery (80%), OAHD needed 75min while HD
required more than 108min.