Abstract
ABSTRACT Currently ethylene glycol mono methyl ether (EGME) and diethylene glycol mono methyl ether (DiEGME) are used as fuel system icing inhibitor additives in both military and commercial aircraft. These compounds are toxic at the concentrations that required for effective deicing When fuel systems sumps, filters and storage tanks are drained, they contain EGME/DiEGME and create hazards for personnel. Ethyl esters synthesized from oxaacids have been identified as possible fuel system icing inhibitor additive replacements. These compounds were synthesized from oxaacids and ethanol by an acid catalyzed Fischer esterfication method The products were identified by infrared spectrometry, nuclear magnetic resonance spectrometry, and elemental analysis Physical characterization included boiling point determination and refractive index. The tested oxaesters were found to be fuel stable for at least two years by accelerated storage tests. Octanol-water partition coefficients were determined and indicate the compounds have a higher solubility in fuel than in water. These oxaesters are predicted to be non-toxic.
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