Acetone-benzene-chloroform mixture section trajectories

Figure 4.17. Reversible section trajectories of acetone (l)-benzene(2)-chloroform(3)-toluene(4) mixture for two-section column (split 1,2,3 2,3,4) region of possible bottom Regg is shaded.

The example of tangential pinch for four-component mixture is quasisharp separation of azeotropic mixture acetone (l)-benzene (2)-chloroform (3)-toluol (4) of composition Xf (0,350 0,250 0,150 0,250) at intermediate split 1,3(2) 2,4(3) (admixture components heavy and light key are in brackets correspondingly) at the following composition the products xd (0,699 0,001 0,300,0) and xb (0 0,500 10 0,500). The same top product composition, as in the previous example (Fig. 5.18b) of separation of three-component mixture in the top section, is accepted for convenience of analysis. In this case, the boundary elements of top section trajectory bundle, located in face 1-2-3, completely coincides with top section trajectory bundle at separation of previously mentioned three-component mixture. 

Figure 7.9. (a) Section trajectories at quasisharp intermediate split for the equimolar acetone(l)-benzene (2)-chloroform(3)-toluene(4) mixture (L/V = 0.778, Xf i = 1 -b 0 products purity - 0.99), sepa-... 

It is expedient to discuss the influence of these pecuharities on the evolution of distillation trajectories at the concrete example of azeotropic mixture, such as acetone(l)-benzene(2)-chloroform(3). At side 2-3, there is reversible distillation trajectory tear-off segment of the bottom section from vertex 2 to 0 13-point... 

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