Cross-current, multistage 7.1.2
Immiscible solvents 7.1.3
Countercurrent extraction 7.1.4

Right-angle triangular diagram 7.2.3, 7.2.7, Crosscurrent Leaching  7.2.5, 7.2.6
Ponchon-Savarit Diagram 7.2.4
Countercurrent Leaching 7.2.8
Equilibrium Stages for constant solvent/inert ratio in underflow 7.2.9

Constant and Falling Rate of Drying 7.3.1, Drying of Granular Solid, Air Requirement 7.3.2
Cooling tower Operation 11.3, Cooling Tower Height 11.4

Leaf Filter, Constant Filtration Rate 12.1
Plate and Frame Press, Constant Pressure, Cake Washing 12.2
Centrifugal Filtration 12.3

Cyclone separator 7.6.1, Electrostatic precipitator 7.6.3, Venturi Scrubber 664