公开(公告)号：US20200002252A1

公开(公告)日：2020-01-02

申请号：US16454406

申请日：2019-06-27

Applicant: AXENS

Inventor： Isabelle PREVOST ,  Jerome PIGOURIER ,  Pierre-Yves MARTIN ,  Arnaud COTTE

IPC: C07C15/08 ,  C07C7/04 ,  B01D3/14

Abstract: The present invention relates to a process for producing high-purity para-xylene, comprising a single step of separation by adsorption in an SMB, with a subsequent step of separation by distillation in a first three-fraction distillation column producing at least two raffinates and optionally of two isomerization steps, making it possible to improve the overall para-xylene yield of the aromatic loop and to minimize the economic impact.

公开(公告)号：US20190338196A1

公开(公告)日：2019-11-07

申请号：US16401171

申请日：2019-05-02

Applicant: Axens

Inventor： Arnaud COTTE ,  Jérôme PIGOURIER ,  Nicolas PUPAT

IPC: C10G7/06 ,  C07C7/04 ,  C07C7/00

Abstract: The present invention relates to a process and a device for separating a feedstock comprising benzene, toluene and C8+ compounds, by means of at least one “reformate” distillation column (C1), one aromatics extraction unit (P1), one para-xylene separation unit (P2), one xylene isomerization unit (P3) and one transalkylation unit (P4), the effluents of said units being separated in the following distillation columns: purification column (C6), deheptanizer (C7) and toluene column (C10), in which at least one of said distillation columns is suitable for being operated under vacuum so that: the majority of the C7− compounds are recovered in the product at the top of the distillation column operated under vacuum, and the majority of the C8+ compounds are recovered in the product at the bottom of the distillation column operated under vacuum.