Method of recovering pure aromatic substances

Details Method of recovering pure aromatic substances Method of recovering pure aromatic substances

1984-09-18

1986-05-06

Bascomb, Wilbur

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 25, 203 27, 203 74, 203 77, 585808, 585865, B01D 340

Patent

active

045869863

ABSTRACT:
Disclosed is a method for recovering pure aromatic substances from a mixture of hydrocarbons containing both aromatic and non-aromatic fractions. The input mixture is fed through an extractive stage provided with a preliminary distillation column. In the preliminary stage the aromatics-containing product is treated at a pressure up to 20 bar and a temperature up to 300.degree. C. The pressure is adjusted to a value at which the operational temperature of the preliminary stage is higher than the pressure and temperature in the extractive stage and the heat of the vapors discharged from the preliminary stage is used for heating the extractive stage.

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