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Distillation Column

Description

Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a counterflow. Ethanol/water is recommended as the liquid mixture for the device. The liquid mixture is added to the evaporator (bottom) tank. The mixed vapour produced moves upwards in the column. The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol). It leaves the top of the column and is condensed using a condenser and a phase separation tank. Part of the condensate is collected in a tank as product while the rest is fed back into the column. Here, on its way downwards, it undergoes further heating and material exchange with the rising mixed vapour. This exchange causes the vapour phase to become richer in ethanol and the liquid phase to become richer in water. The liquid phase moves to the bottom where it is collected.

A sieve tray column and a packed column are available. The packed column is filled with Raschig rings. The reflux ratio is adjusted using valves. Relevant measured values are recorded by sensors and displayed digitally on the switch cabinet. The evaporator is adjusted using a PID controller.A large, clear process schematic on the switch cabinet makes it easy to assign all the process variables.

Specification

discontinuous rectification with packed and sieve tray column
interchangeable columns
sieve tray column with 8 trays
packed column with Raschig rings
vacuum mode possible with water jet pump
electrically heated evaporator
tank for top product
condenser and phase separation tank for top product
all tanks made of DURAN glass and stainless steel
adjustment of reflux ratio using valves
8 temperature measuring points per column

Technical data

Columns: internal diameter: 50mm, height: 765mm

Water jet pump: final vacuum: approx. 200mbar

Tanks