Patent ID: 11898108
Assignee: AXENS
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 4:
5. The process according to claim 1, wherein the rectifying step (e) uses a distillation column (21) equipped with feed tray(s), optionally with packing and with draw-off tray(s), and in that:
the first residue (15) from the fractionating step (c), optionally at least partially vaporized, feeds said distillation column (21) at at least one feed tray,
the secondary distillate (23) is drawn off from said distillation column (21) at a draw-off tray,
the secondary residue (16) is drawn off at the bottom of said distillation column (21), and
the overhead vapor stream (22) is cooled.