Distillation: processes – separatory – With fractional condensation of vapor outside still
Patent
1990-02-07
1991-05-28
Manoharan, Virginia
Distillation: processes, separatory
With fractional condensation of vapor outside still
202186, 202199, 202205, 203 94, 203 98, 203 99, 203DIG9, 203DIG19, 208308, B01D 310
Patent
active
050192183
ABSTRACT:
Improved hydrocarbon vacuum distillation process wherein the process steps include introducing a feed which contains liquid hydrocarbons and vaporous hydrocarbons into an inlet section (3) of a distillation column (1) operating at a subatmospheric pressure, removing liquid from a bottom section (6) of the distillation column (1), allowing vapor to pass through three condensation sections (13b, 13a and 13) arranged above each other in the distillation column (1) between the inlet section (3) and a top section (8), removing vapor from the top section (8), spraying into each condensation section (13, 13a and 13b) cooled liquid, and removing liquid from each condensation section (13, 13a and 13b), wherein the cooled liquid which is sprayed into each condensation section (13, 13a and 13b) includes liquid removed from that condensation section (13, 13a and 13b), and wherein the cooled liquid which is sprayed in the uppermost condensation section (13) further includes liquid removed from the condensation sections (13a, 13b) arranged below the uppermost condensation section (13).
REFERENCES:
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patent: 2885354 (1959-05-01), Myers
patent: 2901425 (1959-08-01), Waddill
patent: 4834868 (1989-05-01), Lappin
patent: 4894145 (1990-01-01), Jensen
Hamer Johannes A.
van der Heijden Pieter
Manoharan Virginia
Reper Ronald R.
Shell Oil Company
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