Oleic acid, phase diagram

FIGURE 11.6 Example phase diagram oil-water-surfactant system. (Adapted from C12E10-water-oleic acid diagram van Os et al., 1993.)... 

Figure 10.4 Phase diagrams of the systems h O/NaCI-rape oleic acid methyl ester/suet-Lutensol AP9 at <(> = 0.50 and e = 0.10. The parameter 0 corresponds to the mass fraction of suet in the mixture of suet and rape oleic acid methyl ester. With increasing 0, the phase behaviour is shifted to higher temperatures and surfactant mass fractions. Because of the dominance of the Lc,-phase a phase diagram at 0 = 1.00 could not be obtained.

Polymorphisms In the phase diagram of oleic acid, the melting... 

Figure 11. Phase diagram of oleic acid including 5% linoleic add.

Fatty acids have a lower solubility in typical ionic detergent solutions than in bile acid solutions, for a given micellar concentration. To paraphrase, the micellar zone in the ternary phase diagram of this system (ionic detergent-fatty acid-water) is smaller than that in the system bile acid-fatty acid-water. Small has constructed the sodium oleate-oleic acid-water phase diagram (32) the micellar zone is extremely small because of the formation of liquid crystalline phases of oleic-sodium oleate at very low oleic acid/ sodium oleate ratios. In unpublished experiments carried out several years ago, we compared the solubility of lauric acid in 40 mM solutions of sodium taurodeoxycholate and sodium glycodeoxycholate with that in sodium octyl benzene sulfonate. Lauric acid at concentrations of 1, 5, and 10 mM was completely soluble in these bile acid solutions at pH 6.3. By contrast, a 5 mM concentration of lauric acid in sodium octyl benzene sulfonate solution was completely turbid. 

Figure 20.4.12. Temperature vs. ethyl lactate mass fraction phase diagrams at atmospheric pressure for the mixtures ( ) (ethyl lactate + olive oil), (A) (ethyl lactate + olive oil with 11.60 wt% of oleic acid) and (O) (ethyl lactate containing 2.80 wt% of water + olive oil).

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