Process for separating mixtures of aromatic C8 hydrocarbons

Details Process for separating mixtures of aromatic C8 hydrocarbons Process for separating mixtures of aromatic C8 hydrocarbons

1993-06-14

1996-04-23

Pal, Asok

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

C07C 700

Patent

active

055105629

ABSTRACT:
A processing cycle for separating C.sub.8 aromatics (mixtures of ortho-, para-, meta-xylene and ethylbenzene) is disclosed, in which a first subdivision of the mixture is preformed into two streams respectively comprising: para-xylene and ethylbenzene as the first stream; and meta- and ortho-xylene as the second stream followed by a separation of the first stream by rectification, during which ethylbenzene within specifications is obtained as the overhead fraction, with the second stream also being sent to a separation by rectification, with ortho-xylene within specifications being obtained as the bottom fraction. The possible content of C.sub.9 species can be furthermore removed by subsequent distillation.

REFERENCES:
patent: 3656278 (1972-04-01), Drinkard et al.
patent: 3698157 (1972-10-01), Allen et al.
patent: 3729523 (1973-04-01), Grandio, Jr. et al.
patent: 3770841 (1973-06-01), Meyers, Jr.
patent: 4585526 (1986-04-01), Berg et al.

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