EVAPORATION Flashcards
The process of removing solvent from a solution by boiling the liquid in a vessel and withdrawing the vapor leaving a concentrated pdt is
Evaporation
Drying involves the removal of water from a. ..
Solud
Evaporation is the removal of water in a
Solution
Drying involves removal of water at temperature….
Below the boiling point
Evaporation means removal of water at … temperature
At a boiling point
Evaporator are classified into three namely
Simple evaporator
Forced circulation evaporator
Multiple effect evaporator
Climbing film evaporator
Horizontal evaporator are under which class of evaporator
Forced circulation evaporator
Evaporating pan
Evaporating still and short tube evaporators are under … evaporator
Simple evaporator
Three processes that transfer in evaporator are
Conduction
Radiation and
Convection
Evaporation can be affected by
Temp.
Time of evaporation
Moisture content
Concentration
S.A
Vapour pressure
Type of pdt required
Evaporating pan cannot be used for a … material
Thermolabile
Cheap to construct
Easy to clean and use
Easy stirring of the evaporating liquid can be done easily by … evaporator
Evaporating pan
… evaporator is easy to clean and use
Evaporating pan
… evaporator is easy to clean and maintain
Evaporating still
Evaporating still can use solvent other than water.T/F
True
Disadvantages of evaporating still is
Liquor is heated all the time
Heating surface is limited
Short tube evaporators is also known as…
Tube evaporators
Tube evaporators consist of 1-2m of tube and assemblage of tube is called …
Calendria
It can be used to concentrate extracts with different solvent.
Evaporators are limited to hormones, antibodies and enzyme
It is an advantage of… evaporator
Multiple effect evaporator
… evaporator have a different solvent of different b.p
Multiple effect
Two multiple effect evaporator are connected together with… arrangements
Piping
