Method of separating aromatics from a hydrocarbon mixture having

Details Method of separating aromatics from a hydrocarbon mixture having Method of separating aromatics from a hydrocarbon mixture having

1991-12-05

1993-06-01

Manoharan, Virginia

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 3, 203 58, 203 75, 203 78, 203 81, 203DIG8, 203DIG9, 585808, 585865, B01D 340

Patent

active

052156290

ABSTRACT:
A process for separating an aromatic from a mixture containing also nonaroma includes distilling off the nonaromatics from the top of the extractive distillation column as a top product, drawing the aromatic and selective solvent from the extractive distillation column and subsequently separating the selective solvent from the aromatic in a separator column. The extractive distillation column is provided with a separate top product distillation column for recovery of a selective solvent residue from the separated nonaromatics. The entry hydrocarbon mixture is heated prior to admission to the extractive distillation column by an indirect heat exchange with selective solvent drawn from the separator column and heated to a temperature of from 130.degree. to 150.degree. C.
The heated entry hydrocarbon mixture is depressurized to form a liquid phase and a vapor phase and these phases are separately fed into the extractive distillation column, the vapor phase entry point being below the liquid phase entry point. The distillation conditions in the top product distillation column are adjusted so that a sump product is obtained with a solvent content of 1.5 to 2.5% by weight. The sump product of the top product distillation column is fed back into the extractive distillation column to provide a reflux to the top of the extractive distillation column.

REFERENCES:
patent: 2168570 (1939-08-01), Kraft
patent: 2993844 (1961-07-01), Nijan
patent: 3639497 (1972-02-01), Martel et al.
patent: 4048062 (1977-09-01), Asselin
patent: 4081355 (1978-03-01), Preusser et al.
patent: 4246073 (1981-01-01), Umeda et al.
patent: 4278505 (1981-07-01), Danulat et al.
patent: 4586986 (1986-05-01), Preusser et al.
patent: 4751338 (1988-06-01), Tabak et al.

Affiliated with

Also associated with

Rating

Method of separating aromatics from a hydrocarbon mixture having does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of separating aromatics from a hydrocarbon mixture having, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of separating aromatics from a hydrocarbon mixture having will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1811996