Separation Of Heterogeneous Azeotropes

If the feed is in the two-phase region, the two phases may be separated and fed to each of two columns. Suppose that the boiling-point diagram for a mixture of components A and B is as shown in Fig. 6-8. The feed is introduced to the separator shown in Fig. 6-9 which operates at the temperature Tsep. Phase I is then fed to column 1 and phase II to column 2. The bottom products of columns 1 and 2 are relatively pure B and A, respectively. The distillate compositions are approximately those of the azeotrope, and consequently the distillates are fed to the separator.

Pressure Sensitive Azetrope

Figure 6-4 Boiling-point diagrams for a minimum-boiling homogeneous azeotrope which is sensitive to a change in the total pressure. (Ai. Van Winkle, Distillation, 1967, by courtesy McGraw-Hill Book Company.)

Figure 6-4 Boiling-point diagrams for a minimum-boiling homogeneous azeotrope which is sensitive to a change in the total pressure. (Ai. Van Winkle, Distillation, 1967, by courtesy McGraw-Hill Book Company.)

Pressure Sensitive Azetrope
Book Company.)
Minimum Boiling Azeotrope Diagram Images

Figure 6-6 Boiling-point diagrams for a maximum-boiling azeotrope which is sensitive to a change in the total pressure. (Ai. Van Winkle, Distillation, ยก967, by courtesy McGraw-Hill Book Company.)

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