Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Reexamination Certificate
2006-12-26
2006-12-26
Dang, Thuan Dinh (Department: 1764)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
Reexamination Certificate
active
07154014
ABSTRACT:
A transalkylation process for reacting carbon number nine aromatics with toluene to form carbon number eight aromatics such as para-xylene is herein disclosed. The process is based on the discovery that deactivating contaminants present in typical hydrocarbon feeds, such as chlorides, can be removed with an alumina guard bed prior to contacting with a transalkylation catalyst. Effective transalkylation catalysts have a solid-acid component such as mordenite, and a metal component such as rhenium. The invention is embodied in a process, a catalyst system, and an apparatus. The invention provides for longer catalyst cycle life when processing aromatics under commercial transalkylation conditions.
REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 3709979 (1973-01-01), Chu
patent: 3832449 (1974-08-01), Rosinski et al.
patent: 3849340 (1974-11-01), Pollitzer
patent: RE28341 (1975-02-01), Wadlinger et al.
patent: 4076842 (1978-02-01), Plank et al.
patent: 4159282 (1979-06-01), Olson et al.
patent: 4163018 (1979-07-01), Tada et al.
patent: 4241036 (1980-12-01), Flanigen et al.
patent: 4278565 (1981-07-01), Chen et al.
patent: 4358362 (1982-11-01), Smith et al.
patent: 4440871 (1984-04-01), Lok et al.
patent: 4537754 (1985-08-01), Casci et al.
patent: 4556477 (1985-12-01), Dwyer
patent: 4567029 (1986-01-01), Wilson et al.
patent: 4857666 (1989-08-01), Barger et al.
patent: 5296208 (1994-03-01), Lesch
patent: 5516736 (1996-05-01), Chang et al.
patent: 5723710 (1998-03-01), Gajda et al.
patent: 5763720 (1998-06-01), Buchanan et al.
patent: 6060417 (2000-05-01), Kato et al.
patent: 6486372 (2002-11-01), Merlen et al.
patent: 6613709 (2003-09-01), Merlen et al.
patent: 6740788 (2004-05-01), Maher et al.
patent: 0 378 916 (1992-11-01), None
Boldingh Edwin P.
Negiz Antoine
Pischek Sergio A.
Dang Thuan Dinh
Maas Maryann
Tolomei John G.
UOP LLC
LandOfFree
Alumina guard bed for aromatics transalkylation process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alumina guard bed for aromatics transalkylation process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alumina guard bed for aromatics transalkylation process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3675469