公开(公告)号：US20250083135A1

公开(公告)日：2025-03-13

申请号：US18465302

申请日：2023-09-12

Applicant: UOP LLC

Inventor： Kristen E. Allaire ,  Rajesh Rajappan ,  Raymond Shih ,  Laxmikant Bharuka

IPC: B01J29/076 ,  B01J23/28 ,  C07C6/12

Abstract: A catalyst stacked bed system with varying metal concentration for transalkylation and a method of transalkylation utilizing the catalyst are described. There is a first catalyst bed comprising a zeolite and a metal on top of a second catalyst bed comprising the same zeolite and metal in order to optimize performance benefits. The catalyst stacked bed system may comprise two or more catalyst beds. The first catalyst bed is positioned to contact the feed before the second (or subsequent) catalyst bed. The first catalyst bed has a total metal content of 1 wt % or more, and its total metal content is higher than the second catalyst bed. Each subsequent bed has a lower metal content than the previous bed. The metal for the first and second bed is selected from Groups 6-10 and 14 of the Periodic Table, or combinations thereof.

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.

公开(公告)号：US20230024175A1

公开(公告)日：2023-01-26

申请号：US17836439

申请日：2022-06-09

Applicant: UOP LLC

Inventor： Nirlipt Mahapatra ,  Ashish Mathur ,  Prasenjit Basu Sarkar ,  Rajesh Rajappan ,  Stanley Joseph Frey ,  Richard K. Hoehn ,  Priyesh Jayendrakumar Jani ,  Amit Jain

IPC: C10G67/14 ,  C10G9/36 ,  C10G45/32 ,  C10G7/00 ,  C10G45/02 ,  C10G45/44 ,  C10G69/06

Abstract: Saturation of a pyrolysis stream is achieved while managing exotherms. The pyrolysis stream is split into at least two feed streams for at least two saturation reactors. The process may split the hydrogen stream into at least two streams for the at least two saturation reactors. A recycle stream may also be provided to manage the exotherm. The feed may comprise at least 5 wt % aromatics.