Huls Aktiengesellschaft

Huls Aktiengesellschaft, Werk Troisdorf

Johann-Heinrich Schroeder

Anton Schoengen

Hermann-Josef Korte

Rudolf Modic

Jorg Porschen

J Org Porschen

Process for the purification of an oxidation off gas

In the purification of an off-gas stream originating from a process of oxidizing a liquid mixture of para-xylene with methyl para-toluate with an oxygen-containing gas under pressure, the off-gas being contaminated with at least one of an aliphatic and an aromatic impurity, which comprises expanding the off-gas stream in an expansion turbine for generating mechanical or electrical energy so as to obtain an at least partial recovery of the energy contained in the off-gas, the improvement comprising subjecting the off-gas to at least one absorption step under pressure to remove at least one component from the off-gas and subjecting the resultant off-gas stream to combustion under a pressure of more than 3 bar prior to expanding the off-gas stream in the expansion turbine.

Process for the purification of an oxidation off gas with energy recovery

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Dortmund, Germany

Johann-Heinrich Schroeder