Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Reexamination Certificate
2004-03-19
2008-11-11
Johnson, Edward M (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
C502S056000
Reexamination Certificate
active
07449420
ABSTRACT:
Improved processes are provided for the production of alkyl aromatic compounds using zeolite catalyst(s) and for periodic reactivation in situ of zeolite catalyst(s) that have at least in part become deactivated. Processes according to this invention are typically carried out in a reaction section loaded with catalyst(s) wherein a desired alkyl aromatic compound is produced from feed aromatic and olefin compounds followed by a separation section in which the desired product is isolated and recovered. Alkylation, transalkylation, and/or isomerization reactions that occur in the reaction section are carried out in liquid phase or partial liquid phase over the said zeolite catalyst(s). At least a portion of the zeolite catalyst(s) employed in the reaction section is (are) reactivated in situ, periodically or when deemed necessary, by contacting the deactivated catalyst(s), at elevated temperature and in the substantial absence of olefin feedstock, with an aromatic stripping stream comprising the feed aromatic compound, the desired alkyl aromatic product, byproducts formed in the process, or mixtures thereof, to restore its (their) activity.
REFERENCES:
patent: 3751504 (1973-08-01), Keown et al.
patent: 3851004 (1974-11-01), Yang
patent: 4016218 (1977-04-01), Haag et al.
patent: 4049739 (1977-09-01), Zabransky et al.
patent: 4086287 (1978-04-01), Kaeding et al.
patent: 4100217 (1978-07-01), Young
patent: 4104319 (1978-08-01), Kaeding
patent: 4117020 (1978-09-01), Sun
patent: 4143084 (1979-03-01), Kaeding et al.
patent: 4169111 (1979-09-01), Wight
patent: 4459426 (1984-07-01), Inwood et al.
patent: 4547605 (1985-10-01), Kresge et al.
patent: 4822943 (1989-04-01), Burress
patent: 4849569 (1989-07-01), Smith, Jr.
patent: 4857666 (1989-08-01), Barger et al.
patent: 4891458 (1990-01-01), Innes et al.
patent: 4908341 (1990-03-01), Pruden et al.
patent: 4950834 (1990-08-01), Arganbright et al.
patent: 4954325 (1990-09-01), Rubin
patent: 4982030 (1991-01-01), Kaeding et al.
patent: 4992606 (1991-02-01), Kushnerick et al.
patent: 5004841 (1991-04-01), Lee et al.
patent: 5012021 (1991-04-01), Vora et al.
patent: 5021141 (1991-06-01), Rubin
patent: 5030786 (1991-07-01), Shamshoum et al.
patent: 5077445 (1991-12-01), Le
patent: 5081323 (1992-01-01), Innes et al.
patent: 5086193 (1992-02-01), Sy
patent: 5113031 (1992-05-01), Sy
patent: 5118897 (1992-06-01), Khonsari et al.
patent: 5146026 (1992-09-01), Tejero et al.
patent: 5157185 (1992-10-01), Chu et al.
patent: 5160497 (1992-11-01), Juguin et al.
patent: 5175135 (1992-12-01), Lee et al.
patent: 5198595 (1993-03-01), Lee et al.
patent: 5212128 (1993-05-01), Schorfheide et al.
patent: 5215725 (1993-06-01), Sy
patent: 5236575 (1993-08-01), Bennett et al.
patent: 5240889 (1993-08-01), West et al.
patent: 5250277 (1993-10-01), Kresge et al.
patent: 5258565 (1993-11-01), Kresge et al.
patent: 5292698 (1994-03-01), Chu et al.
patent: 5306681 (1994-04-01), Schorfheide et al.
patent: 5334795 (1994-08-01), Chu et al.
patent: 5362697 (1994-11-01), Fung et al.
patent: 5371310 (1994-12-01), Bennett et al.
patent: 5430211 (1995-07-01), Pogue et al.
patent: 5437855 (1995-08-01), Valyocsik
patent: 5453554 (1995-09-01), Cheng et al.
patent: 5493065 (1996-02-01), Cheng et al.
patent: 5522984 (1996-06-01), Gajda et al.
patent: 5530170 (1996-06-01), Beck et al.
patent: 5536894 (1996-07-01), Degnan et al.
patent: 5557024 (1996-09-01), Cheng et al.
patent: 5563311 (1996-10-01), Chang et al.
patent: 5569805 (1996-10-01), Beck et al.
patent: 5672799 (1997-09-01), Perego et al.
patent: 5689025 (1997-11-01), Abichandani et al.
patent: 5811613 (1998-09-01), Bhat et al.
patent: 5900520 (1999-05-01), Mazzone et al.
patent: 5902917 (1999-05-01), Collins et al.
patent: 5907073 (1999-05-01), Ghosh
patent: 5980859 (1999-11-01), Gajda et al.
patent: 6049018 (2000-04-01), Calabro et al.
patent: 6051521 (2000-04-01), Cheng et al.
patent: 6060632 (2000-05-01), Takamatsu et al.
patent: 6096935 (2000-08-01), Schulz et al.
patent: 6162416 (2000-12-01), Gajda et al.
patent: 6232515 (2001-05-01), Schulz et al.
patent: 6281399 (2001-08-01), Schulz et al.
patent: 6313362 (2001-11-01), Green et al.
patent: 6479721 (2002-11-01), Gajda et al.
patent: 6525234 (2003-02-01), Dandekar et al.
patent: 0 353 813 (1990-02-01), None
patent: 0 467 007 (1992-01-01), None
patent: 56133224 (1981-10-01), None
patent: WO 01/83408 (2001-11-01), None
patent: WO 02/26671 (2002-04-01), None
patent: WO 02/062734 (2002-08-01), None
patent: WO 03/006160 (2003-01-01), None
Demers Francis A.
Hwang Shyh-Yuan Henry
Johnson Dana
Mukaddam Waheed A.
Clement Alan B.
Johnson Edward M
Locke Lord Bissell & Liddell LLP
Stone & Webster Inc.
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