Apparatuses and methods for separating paraffin isomerization-zone effluents

摘要

Embodiments of apparatuses and methods for separating a paraffin isomerization-zone effluent are provided. In one example, an apparatus comprises a DIB column configured for fractionating the paraffin isomerization-zone effluent to form a branched C4 hydrocarbon-rich stream. The DIB column comprises a vessel. The vessel comprises a cylindrical wall that extends vertically and that encloses an internal cylindrical volume having a lower portion extending to an upper portion. An internal swage is disposed in the lower portion of the internal cylindrical volume. A plurality of fractionation trays includes an upper fractionation tray that is disposed in the internal cylindrical volume above the internal swage and a lower fractionation tray that is disposed in the internal swage. The lower fractionation tray has a smaller diameter than the upper fractionation tray.

主权项

1. An apparatus for separating a paraffin isomerization-zone effluent, the apparatus comprising:
a DIB column that is configured for fractionating the paraffin isomerization-zone effluent to form a branched C4 hydrocarbon-rich stream, the DIB column comprising:
a vessel comprising a cylindrical wall that extends vertically and that encloses an internal cylindrical volume having a lower portion extending to an upper portion;an internal swage that is disposed in the lower portion; anda plurality of fractionation trays including an upper fractionation tray that is disposed in the internal cylindrical volume above the internal swage and a lower fractionation tray that is disposed in the internal swage and that has a smaller diameter than the upper fractionation tray.