Liquid-liquid separation technology improves IFPEXOL process economics

04/16/2001
A water wash has been found that effectively recovers the solvent in the IFPEXOL process by pulling dissolved methanol into water for subsequent removal.The water-solvent mixture and hydrocarbon have a low interfacial tension that often forms a stable emulsion and is difficult to separate by conventional settling processes.Effective separation of this emulsion and reuse of the methanol is critical in achieving optimum cost-effectiveness of the process.IFPEXOL is a cryogenic liquids-separation process that uses methanol for dew point suppression instead of glycol. But the solvent losses resulting from the dissolution of methanol in the generated hydrocarbon liquids can be very costly.The p...
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