Summary
Oleic acid of 99–100% purity has been prepared in 36–43% yield from olive oil. The combination of two urea-adduct separations (at room temperature) and three acid soap crystallizations (at 3°C.) gives an oleic acid of high quality without recourse to fractional distillation or low-temperature solvent crystallization.
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Rubin, L.J., Paisley, W. Pure oleic acid from olive oil. J Am Oil Chem Soc 37, 300–302 (1960). https://doi.org/10.1007/BF02631772
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DOI: https://doi.org/10.1007/BF02631772