Phase diagram water-acetic acid-vinyl acetate

Figure 7.17 Ternary A/B/C phase diagram (at 25°C, 1 atm) for A = acetic acid, B = vinyl acetate, C = water, showing nonhorizontal tie-lines in the immiscible two-phase region (organic liquid + aqueous liquid), culminating at a plait point (x). Concentration grid values (dotted lines) are in wt% at 10% intervals.

As shown in Fig. 7.17, the limiting plait point appears at a concentration of approximately 35 wt% acetic acid, 38 wt% vinyl acetate, and 27 wt% water, which can be read from the dotted grid of concentration values shown in the background [using the trick shown in (7.94)]. Sidebar 7.17 presents some simple problems that provide experience in reading and interpreting the ternary phase diagram. 

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