Duo-Sol : A process for separating aromatic from aliphatic hydrocarbons by partition between two solvents. The first solvent (Selecto or Selectox) is a mixture of phenol and cresylic acids; the second is liquid propane
Comyns, Alan E. Dictionary, Encyclopedic Dictionary of Named Processes in Chemical Technology (3rd ed.), Alan E. Comyns (Ed.), Boca Raton, FL, CRC Press LLC, USA 2000, http://worldtracker.org/media/library/Science/Chem istry/Synthesis/Encyclopedic%20Dictionary%20of%20N amed%20Processes%20in%20Chemical%20Technology.pdf, (Named Chem Procss - Amer) {35}