This last column can be used to recover the solvent for extraction or to be used separately for the distillation process.

Apparatus The apparatus consists of a liquid-liquid extraction glass column mounted on the side of the distillation column.

This unit can develop and analyze the following topics: Extract

Determine the number of transfer units

Height of the transfer unit

Calculation of mass transfer coefficient

Calculate the number of theoretical stages

Concentration trends along the column

Extraction efficiency

Mass balance

Practice on a system with 3 partially mixable components:

Distillation

Recover the solvent used in the extraction

Distillation of different mixtures (water/ethanol, water/methanol, methanol/propanol, etc.) with changes in the following operating parameters: – reflux ratio – feed flow rate – reboiler heating power – feed  composition Flood

Silenced air compressor

Air displacement: 50 L/min.

Safety valve

Pressure gauge

Noise level: 40 dB /1 m

Size of the air tank: 24 lt.

Operating pressure: max. 10 bar controlled by a pressure switch

Power: 0,5 HP

Motor with thermal overload protection

220-240 V / 50 Hz 

Refractometer

Measurement range of refractive index ND 1.300 – 1.700

Temperature range: 0/70°C

Enlargement 2x

Measurement accuracy ND ? 0.0002

Mass fraction (BRIX).