公开(公告)号：US20240109824A1

公开(公告)日：2024-04-04

申请号：US18459618

申请日：2023-09-01

Applicant: UOP LLC

Inventor： Daniel Ziegler ,  Gregory R. Werba ,  Cealashea Baggett ,  Joe R. Haas ,  Rajesh Rajappan

IPC: C07C7/08 ,  B01D3/00 ,  B01D3/14 ,  B01D3/40

CPC classification number: C07C7/08 ,  B01D3/007 ,  B01D3/143 ,  B01D3/40

Abstract: Processes and apparatuses for separating aromatic and non-aromatic hydrocarbons by extractive distillation. A solvent is mixed with the aromatic and non-aromatic hydrocarbons. A first separation column separates non-aromatic hydrocarbons from the solvent and the aromatic hydrocarbons. A second separation column separates the aromatic hydrocarbons and the solvent. A side draw stream from the second separation column is used to heat the feed stream to the first separation column. A bottom stream from the second separation may be used to heat the liquid in the first separation column. A stab-in reboiler may be used to transfer heat from the bottoms stream to the liquid in the first separation column.