Distillation Columns or Towers are constructed to behave in the same way as a series of separate stills as discussed earlier. Each “still” section consists of a number of “Trays”.

Columns for the distillation process can be of the following types:

  • The “Packed” Tower
  • The “Tray” Tower


Tray Towers, is a tall, cylindrical column. Inside, a series of trays are placed, one above the other.

The types of tray used in distillation columns are as follows:

  • Valve Tray
  • Sieve Tray
  • Bubble Cap Tray