This is essentially a compact batch-type fractional distillation unit in which the reboiler consists of a vessel mounted in a heating bath and with a packed column above. The vapours from top is condensed and can be refluxed as per requirement. The top product is sub-cooled and collected in receivers.The bottom product is finally drained from the reboiler through a drain valve.The units are available in vessel sizes of 20,50,100 & 200L, and 300Ltr. is suitable for operation under atmospheric pressure and full vaccum.
