Extraction of furfural from aromatic de-oiler kettle product in butadiene distillation

Abstract

Abstract THERE ARE TREATED, TO RECOVER FURFURAL THEREFROM, AROMATIC OILS WHICH ARE UNAVOIDABLY OBTAINED IN THE PRODUCTION OF BUTADIENE WHICH INVOLVES CRACKING OF BUTANE TO BUTENES, DEHYDROGENATIONOF BUTENES TO BUTADIENE AND RECOVERY OF BUTADIENE BY ABSORPTIO, STRIPPING AND DISTILLATION EMPLOYING FURFURAL TO ABSORB THE BUTADIENE, FOLLOWED BY DE-OILING OF AN AROMATIC OILS BOTTOMS CONTAINING FURFURAL OBTAINED FROM A BUTADIENE RECOVERY COLUMN OBTAINING SAID AROMATIC OILS. THE OILS ARE TREATED WITH WATER TO RECOVER FURFURAL THEREFROM FOLLOWING WHICH THE WATER CONTAINING FURFURAL IS STRIPPED EMPLOYING A HYDROCARBON, FOR EXAMPLE, THE HYDROCARBON FEED CONTAINING BUTANE AND BUTENES PASSING TO THE ABSORBER, IN WHICH BUTENES ARE ABSORBED FOR LATER CONVERSION TO BUTADIENE, THUS TO RECOVER FROM THE WATER THE FURFURAL THEREIN CONTAINED. CONTROL OF THE OILS IN THE FURFURAL IN THE OVER-ALL OPERATION OF RECOVERY OF BUTADIENE IS ACCOMPLISHED BY ADJUSTING THE OVERHEAD TEMPERATURE OF A STRIPPER IN WHICH BUTENES AND BUTADIENE WAS SEPARATED FROM FURFURAL TOGETHER WITH SAID OILS FROM A BOTTOMS WHICH CONTAINS FURFURAL AND WHICH ARE REUSED IN THE RECOVERY OPERATION AND/OR BY ADJUSTING THE RELATIVE PROPORTION OF FURFURAL FROM THE DEOILING OF THE BUTADIENE RECOVERY WHICH ARE REUSED RELATIVE TO BOTTOMS WHICH ARE TREATED ACCORDING TO THE INVENTION. METHOD AND APPARATUS ARE DESCRIBED.

Inventors

• 👤 Ronald S Rogers

Bibliographic Details