Two-stage aromatics isomerization process

Details Two-stage aromatics isomerization process Two-stage aromatics isomerization process

2008-03-27

2009-02-24

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

C585S480000, C585S481000, C585S482000

Reexamination Certificate

active

07495137

ABSTRACT:
This invention is drawn to a process for isomerizing a non-equilibrium mixture of alkylaromatics in two sequential zones, the first zone operating in the absence of hydrogen using a platinum-free catalyst and the second zone using a catalyst comprising a molecular sieve and a platinum-group metal component to obtain an improved yield of para-xylene from the mixture relative to prior art processes.

REFERENCES:
patent: 3201491 (1965-08-01), Stine et al.
patent: 3626020 (1971-12-01), Neuzil
patent: 3696107 (1972-10-01), Neuzil
patent: 3856872 (1974-12-01), Morrison
patent: 3923639 (1975-12-01), Ciric
patent: 4039599 (1977-08-01), Gewartowski
patent: 4184943 (1980-01-01), Anderson
patent: 4283583 (1981-08-01), Velenyi et al.
patent: 4381419 (1983-04-01), Wylie
patent: 4402832 (1983-09-01), Gerhold
patent: 4452769 (1984-06-01), Chu et al.
patent: 4482774 (1984-11-01), Koetsier
patent: 4758419 (1988-07-01), Lok et al.
patent: 4861740 (1989-08-01), Sachtler et al.
patent: 4899011 (1990-02-01), Chu et al.
patent: 4954325 (1990-09-01), Rubin et al.
patent: 4957891 (1990-09-01), Sachtler et al.
patent: 5240891 (1993-08-01), Patton et al.
patent: 6222086 (2001-04-01), Sharma et al.
patent: 6376730 (2002-04-01), Jan et al.
patent: 6448459 (2002-09-01), Magne-Drisch et al.
patent: 6576581 (2003-06-01), Sharma et al.
patent: 6660896 (2003-12-01), Buchanan et al.
patent: 6797849 (2004-09-01), McMinn et al.
patent: 2005/0143614 (2005-06-01), Leon-Escamilla et al.
patent: 2005/0143615 (2005-06-01), Bogdan et al.

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