Two stage oxidation process for the production of aromatic...

Details Two stage oxidation process for the production of aromatic... Two stage oxidation process for the production of aromatic...

2002-05-28

2009-02-03

Oh, Taylor Victor (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S416000

Reexamination Certificate

active

07485747

ABSTRACT:
Disclosed is a process for producing a benzenedicarrboxylic acid such as terephthalic acid wherein a dialkyl benzene compound and acetic acid having catalyst components dissolved therein are fed to a first reaction zone wherein the dialkyl benzene compound is oxidized with molecular oxygen to provide a first oxidation zone product comprising a benzenedicarboxylic acid containing minor amounts of mono-carboxylic acid by-products such as carboxybenzaldehyde and toluic acid. The first oxidation zone product comprising a slurry of a benzenedicarboxylic acid containing minor amounts of mono-carboxylic acid by-products is fed to a second oxidation reaction zone that is operated under more severe conditions of temperature and pressure. The rate of the feed of a molecular oxygen containing gas to the second oxidation zone is about 3% or less of the the rate of the feed of the molecular oxygen containing gas to the first oxidation zone. The benzenedicarboxylic acid product obtained contains a total concentration of carboxybenzaldehyde and toluic acid of about 150 ppmw or less.

REFERENCES:
patent: 3057909 (1962-10-01), Sebelist et al.
patent: 3064044 (1962-11-01), Baldwin
patent: 3452088 (1969-06-01), Olsen et al.
patent: 3584039 (1971-06-01), Meyer
patent: 3799976 (1974-03-01), Nienburg et al.
patent: 3850983 (1974-11-01), Park
patent: 3931305 (1976-01-01), Fisher
patent: 3996271 (1976-12-01), Yokota et al.
patent: 4158738 (1979-06-01), Scott et al.
patent: 4356319 (1982-10-01), Roffia et al.
patent: 4438279 (1984-03-01), Packer et al.
patent: 4467111 (1984-08-01), Puskas et al.
patent: 4500732 (1985-02-01), Petty-Weeks et al.
patent: 4772748 (1988-09-01), Hashizume et al.
patent: 4892970 (1990-01-01), Nowicki et al.
patent: 4939297 (1990-07-01), Browder et al.
patent: 5095146 (1992-03-01), Zeitlin et al.
patent: 5110984 (1992-05-01), Janulis
patent: 5175355 (1992-12-01), Streich et al.
patent: 5510521 (1996-04-01), McGehee et al.
patent: 5567842 (1996-10-01), Izumisawa et al.
patent: 5583254 (1996-12-01), Turner et al.
patent: 5763648 (1998-06-01), Hashizume et al.
patent: RE36008 (1998-12-01), Hindmarsh et al.
patent: 6297348 (2001-10-01), Rodden et al.
patent: 2002/0183546 (2002-12-01), Sheppard et al.
patent: 2002/0193630 (2002-12-01), Lin et al.
patent: 2004/0260052 (2004-12-01), Nagao et al.
patent: 0111784 (1986-02-01), None
patent: 983677 (1965-02-01), None
patent: 1152575 (1969-05-01), None
patent: 1358520 (1974-07-01), None
patent: 1454478 (1976-11-01), None
patent: 11343264 (1990-11-01), None
patent: 2001247511 (2001-09-01), None
patent: 2001-288139 (2001-10-01), None
patent: WO 99/31038 (1999-06-01), None
PCT International Search Report.
Arun Pal Aneja and Viney Pal Aneja, “The Effect of Water and Air Contamination on Poly(Ethylene Terephthalate) Formation”, Polymer Engineering Reviews, 1982, pp. 123-133, vol. 2, No. 2.
Co-pending U.S. Appl. No. 10/161,571, filed May 31, 2002.
Co-pending U.S. Appl. No. 10/423,389, filed Apr. 25, 2003.
USPTO Office Action dated Nov. 27, 2007 for copending U.S. Appl. No. 11/254,406.
USPTO Notice of Allowance dated Dec. 26, 2007 for copending U.S. Appl. No. 11/254,406.
Copending U.S. Appl. No. 11/254,406, filed Oct. 20, 2005.
Copending U.S. Appl. No. 10/161,571, filed May 31, 2002.
Copending U.S. Appl. No. 10/423,389, filed Apr. 25, 2003.
USPTO Office Action dated Nov. 23, 2005 for U.S. Appl. No. 10/423,389.
USPTO Office Action dated Jul. 13, 2005 for U.S. Appl. No. 10/423,389.
USPTO Office Action dated Feb. 7, 2005 for U.S. Appl. No. 10/423,389.
USPTO Office Action dated Jun. 30, 2004 for U.S. Appl. No. 10/423,389.
USPTO Office Action dated Jun. 29, 2005 for U.S. Appl. No. 10/161,571.
USPTO Office Action dated Sep. 9, 2004 for U.S. Appl. No. 10/161,571.
USPTO Office Action dated Apr. 23, 2004 for U.S. Appl. No. 10/161,571.
USPTO Office Action dated Sep. 24, 2003 for U.S. Appl. No. 10/161,571.
USPTO Office Action dated Dec. 4, 2002 for U.S. Appl. No. 10/161,571.

Affiliated with

Also associated with

Rating

Two stage oxidation process for the production of aromatic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two stage oxidation process for the production of aromatic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two stage oxidation process for the production of aromatic... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4099131