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INTRAINMENT in absorbers and fractionating towers has long been recognized to be one of the chief limiting factors governing the capacity of such columns. In their effort to increase the capacity of such equipment, designers have found that high vapor velocities promote more rapid rates of approach toward equilibrium conditions between countercurrent streams of vapor and liquid. In other words, the intimacy of contact and less resistant films of vapor and liquid resulting from these higher vapor velocities offset by far the element of time, often considered a controlling factor in many processes. The problem, therefore, resolves itself into one of reducing entrainment.

No abstract