2. Evaporation stills: it is similar to the evaporation pan with a cover and connected with
condenser.
Advantage: as evaporation pan.
Disadvantage:
1. The heating surface is
limited.
Uses: for aqueous and thermo-lable material under reduced pressure.
b. Forced circulation
evaporator:
Advantage:
1.
Suitable for operation under pressure.
2. Suitable for thermo-lable
material.
c. Film evaporators:
1. Lillie film evaporator
Advantage: evaporates rapidly because has large surface exposed.
2. Long tube evaporator
3. Wiped (Rotary) film evaporator
4. Horizontal film evaporator
5. Filling film evaporator
6. Multiple effect
evaporators
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