Distillation diagram

The transformed variables describe the system composition with or without reaction and sum to unity as do Xi and yi. The condition for azeotropy becomes X, = Y,. Barbosa and Doherty have shown that phase and distillation diagrams constructed using the transformed composition coordinates have the same properties as phase and distillation region diagrams for nonreactive systems and similarly can be used to assist in design feasibility and operability studies [Chem Eng Sci, 43, 529, 1523, and 2377 (1988a,b,c)]. A residue curve map in transformed coordinates for the reactive system methanol-acetic acid-methyl acetate-water is shown in Fig. 13-76. Note that the nonreactive azeotrope between water and methyl acetate has disappeared, while the methyl acetate-methanol azeotrope remains intact. Only... 

In this application, the column is designed with a computer simulation program and then the computer output is used for plotting the distillation diagram to check the design. This example, which is based on two articles by Johnson and Morgan (1985, 1986), also shows how the principles of binary distillation can be applied to multi-component mixtures. 

Distillation diagrams of a solvent mixture a = Engler distillation,... 

Trajectory Bundles Under Infinite Reflux Distillation Diagrams... 

In Fig. 2.4b, another example of the trajectory bundles is shown (let s call the picture of trajectory bundles a distillation diagram), but already for a three-component azeotropic mixture acetone(l)-benzene(2)-chloroform(3). 

However, visualization can be useful at the ends of the sequence, when ternary and binary azeotropic mixtures are obtained. Visual analysis of distillation diagrams is desirable at this stage of presynthesis and synthesis for application of such separation methods as usage of curvatures of distillation regions boundaries, of different of the pressure in the columns, and of entrainers (see Section 8.5). 

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