Solvent recovery

 The solvent is somehow expensive than water. So, it should be recoverable easily. Therefore, it
should be stable to several distillations. There are 3 main methods of solvent recovery namely- 

1)Air drying
2) Heated cylinder drying and 
3) Steaming.

1) Air drying: Hot air is circulated in closed chambers in where the temperature of air exceeds the
evaporating temperature of solvents. Vaporized solvent is condensed and hence recovered.

2) Heated cylinder drying: A number of heated cylinders are used through which the materials are
passed. The temperature of cylinders exceeds the evaporating temperature of solvents.

3) Steaming: As steam and solvent do not mix with each other steam can be used to evaporate and
carry the solvent out.

In an efficient solvent recovery system up to 95% solvent can be recycled.