| 摘要 |
To provide a method for recovering olefin that allows continuously recovering high concentration olefin from olefin-containing gas containing olefin. A method for recovering olefin includes: an olefin concentrating process of supplying a part or all of an olefin-containing gas containing olefin to an olefin-containing-gas separating unit that includes a separation membrane and causing this olefin-containing gas to transmit the separation membrane so as to obtain an olefin concentrated gas reduced in concentration of a component other than olefin to 1/10 or less compared with a concentration of a component other than olefin in the olefin-containing gas; and a residual-gas combustion process of disposal of residual gas that does not transmit the separation membrane in the olefin concentrating process by burning. |
