N

Stage number (from bottom)

Figure 2.17 Temperature profile in multicomponent distillation, Example 2.4. (From C. J. King, Separation Processes, 2d ed., Copyright © by McGraw-Hill, Inc. Reprinted by permission.)

Pac Diagram

Slage number

Figure 2.16 Composition profiles in multicomponent distillation, Example 2.4. (a) Liquid; (6) vapor. (From C. J. King, Separation Processes, 2d éd., Copyright © by McGraw-Hill, Inc. Reprinted by permission.)

Slage number

Figure 2.16 Composition profiles in multicomponent distillation, Example 2.4. (a) Liquid; (6) vapor. (From C. J. King, Separation Processes, 2d éd., Copyright © by McGraw-Hill, Inc. Reprinted by permission.)

temperatures are highly sensitive to the amount of lights present. At the bottom, and just above the feed, the heavy nonkeys concentrations in the liquid change rapidly, and the bubble-point temperature is sensitive to the amount of heavies present.

2.3.3 Hengstebeck diagrams: principles

Hengstebeck's (15) procedure extends the x-y diagram to multicomponent distillation. A multicomponent separation is treated as a binary separation between the keys. Flows and compositions are based on the two keys alone, that is, ye.LK = W^LK +

Hengstebeck Diagrams

Stage number <b)

Figur« 2.16 (Continued)

Distillation Process

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