Patent ID: 9068125
Filing Date: 2015-06-30
Classification: B01D,C07C,C10G

Abstract:
1. A process for the dealkylation of a hydrocarbon mixture rich in C 7 to C 9 aromatics, comprising: submitting the aromatics-rich starting hydrocarbon mixture to an extractive distillation in which the aromatics-containing hydrocarbon mixture is distilled by means of a suitable extracting solvent and freed from it, obtaining a product flow significantly depleted from aromatic hydrocarbons and free of solvent as well as an aromatics concentrate significantly enriched in aromatic hydrocarbons and free of solvent; passing the solvent-free aromatics concentrate to a reactor for hydrodealkylation after the extractive distillation, where it is reacted with hydrogen, giving a dealkylated aromatics stream as main product and a paraffinic hydrocarbon stream and a methane stream as by-products; and passing the aromatic hydrocarbon stream to a purification unit for treatment; wherein the extractive distillation and recovery of the extracting solvent take place in one column.