Question

Difference between flash and differential distillation

Answer 1

When a   mixture of benzene and toluene i.e. 40% of benzene is to be distilled at 1 atm pressure to recover 95% of the benzene.
 
This type of mixture is separated out by Differential distillation 

Flash distillation : - It  is a single stage separation technique.

A liquid mixture feed is pumped through a heater to raise the temperature and enthalpy of the mixture.