Characteristic compared with other evaporator:

The evaporation capacity of a rotary evaporator is greater than that of a conventional, static distillation apparatus. Heat tran***ission in the heating bath as well as inside the flask is greatly improved by rotation of the evaporating flask. Rotation greatly enlarges the active surface inside the flask,hastening the evaporation. With the liquid remaining at any one point of the flask wall for a short time only, it is subject to minimum stress during the distillation (no overheating, no incrustation). Bumping and foaming are greatly reduced by the rotation.   

Rotary evaporators are used for:
1.Distillation of solvent
2.Concentration of soluti*** and suspensi*** 
3.Crystallization or recrystallization 
4.Synthesis and purifying of fine chemicals 
5.Soxhlet extraction 
6.Powder and granules drying 
7.Recycling of solvent