Principle
The separation power of a rectification (fractionating) column
can be determined using an appropriate binary mixture whose
equilibrium composition is measured in the distillation flask and
in the domed glass head of the distillation apparatus. The number
of theoretical trays can be numerically or graphically obtained
from the measured values.
Benefits
- Complete insight into all running processes, because all components have an evacuated, but not silvered isolating-coat
- Simple withdrawel of samples through 2 column intermediate pieces
- High separation efficiency through 2 large packed columns
- Secure, because the high-efficiency condensor of the column head also condense high-volatile liquids
- Simple adjustment of the reflux ratios through onehand-controlled column head
Tasks
- Prepare 10 mixtures of methyl cyclohexane and
n-heptane with substance ratios (mole fractions) from 0 to
1 and with step width of approximately 0.1. To record a calibration
curve, determine the refractive indices of the mixtures and plot
them against the mole fractions.
- Distill a mixture of methyl cyclohexane and n-heptane
in a rectification column with total reflux until an equilibrium
has been established. Determine the composition of the condensate
and the number of theoretical trays in the column for a throughput
of 500 and 1000 ml/h.
What you can learn about
- Bubble tray column
- Rectification
- Raoult's law
- Henry's / Dalton's law
- Boiling-point diagram
- Reflux ratio
Necessary accessories
- Precision balance 620g/0.001g
1 year warranty