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» :: مقاله انگلیسی شیمی
The separation of propylene/propane mixtures is one of the most important but challenging processes in the petrochemical industry. Currently, this separation is mainly achieved by fractional distillation at cryogenictemperature.
 A typical propylene/propane fractionator requires a large number of stages up to 200 and high reflux ratios from 12 to 20 due to the close boiling points of propylene and propane