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Transport-Related Spontaneous Emulsification

FIGURE 6.22 Spontaneous emulsification in the aqueous phase observed 6 minutes after initial contact between water and a mixture of 65% n-propanol and 35% 2,3-dimethyl-pentane at 35°C. Reprinted from Miller (1988) with permission from Elsevier. [Pg.355]

FIGURE 6.23 Sample diffusion path exhibiting spontaneous emulsification (S.E.). The initial compositions are point a (eoio, 0)20) and pure 2 (eo io, oi m)- [Pg.356]

Since both the initiat condition and the boundary conditions for x - 00 are that the initial compositions must exist, a similarity solution is possible (Bird et al., 2002). It has the form [Pg.357]

The constants 5j and B must be determined from boundary conditions at the moving interface, the position of which we denote by 8 (t) Two of these conditions are the following component mass balances  [Pg.357]

The remaining boundary conditions are the phase equilibrium relationships at the interface given by the applieable phase diagram. It may be convenient in calculations to describe the eoexistence curve and tie-hnes by empirical equations such as those proposed by Hand (1930). Whatever the details of the method used, the problem is well posed cmee initial compositions, diffusion coefficients, and equihbrimn data are speeified. The solution yields the concentration profiles in both phases. [Pg.357]


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