| Abstract
| - The phase behavior of anionic microemulsions composed of water, sodium dodecyl sulfate (SDS), dodecane,and short propyleneglycol monoalkyl ethers (CnPOm; n = 3, m = 1 and n = 4, m = 2, 3) is studied. Fromthe pseudoternary phase diagrams, it is inferred that CnPOm compounds have cosurfactant behaviorscomparable to those of 1-butanol and 1-pentanol, which are the most efficient and widely used cosurfactants.In contrast to these alcohols, the CnPOm cosurfactants induce high temperature dependences in the SDSmicroemulsion systems. Furthermore, SDS/CnPOm microemulsions can be formed with small SDSconcentrations (SDS/C4PO3 mass ratio of 1/6.26). These have a low toxicity in contrast to systems containinggenotoxic short ethyleneglycol ethers (CnEOm) as the cosurfactant. The strong temperature dependencecan be favorable in the recovery of reaction products when the microemulsion is used either as a reactionmedium or in extraction processes.
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