| abstract |
The present invention relates to a separation method for easily recovering normal butenes from olefinic oil fractions including isobutene, isobutane, 1-butene, 2-butene and n-butane, and a separation process system using the same. Thus, the separation method can easily convert 1-butene contained in olefin oil fractions into 2-butene, thereby effectively separating and recovering normal butene through fractional distillation, and using a reflux system using a refrigerant or the like The recovered fractions can be easily refluxed, thereby improving the economical efficiency and increasing the separation efficiency. |