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

Claim 21:
22. The plant according to claim 19, further comprising:
one or two hydrocracking section(s) (2) equipped with a feedstock inlet line (1) and a hydrogen inlet line (8),
the fractionating section (12) comprising at least one distillation column equipped with trays, said distillation column producing a first distillate and a first residue (15),
the section for rectifying a second portion (20) of the first residue (15), comprising at least one distillation column (21) equipped with trays and/or packing, said distillation column of the section for rectifying a second portion (20) of the first residue (15) comprising:
at least one inlet line (20) for the second portion of the first, at least partially vaporized residue at at least one feed tray,
at least one line (22) connected to a pressure regulation or vacuum system,
at least one line (23) for drawing off at least the secondary distillate at a draw-off tray,
at least one line (16) for drawing off, at the bottom of the column, said secondary residue,
at least one optional line (26) for injecting a stripping gas, the injection point being located below the feed tray of the stream (20), and
an optional line (18) for recycling a portion of said secondary residue resulting from the fractionating section directly to the or one of the hydrocracking section(s).