公开(公告)号：US20220204871A1

公开(公告)日：2022-06-30

申请号：US17561393

申请日：2021-12-23

Applicant: UOP LLC

Inventor： Mark Van Wees ,  James McGehee ,  Lorenz J. Bauer

IPC: C10G53/06 ,  C10G21/28 ,  C10G21/00 ,  C10G21/14 ,  C10G31/08

Abstract: Process and apparatus for two-stage solvent extraction of hydrocarbon products is disclosed. The process comprises passing a heavy hydrocarbon feed stream and a first fresh solvent to a first extraction column to generate a first overhead stream and a first bottom stream. The first overhead stream is passed to a first stripping column to generate a first product stream and a first stripped solvent stream. The first bottom stream is passed to a second extraction column to generate a second overhead stream and a second bottom stream. A second fresh solvent stream is passed to a second extraction column. The second overhead stream is passed to a second stripping column to generate a second product stream and a second stripped solvent stream. Passing the first stripped solvent stream and the second stripped solvent stream to a solvent recovery column and passing the second bottom stream to a pitch stripper.