Method for the production of maleic anhydride

Details Method for the production of maleic anhydride Method for the production of maleic anhydride

2004-07-06

2008-03-18

Dentz, Bernard (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07345167

ABSTRACT:
A process for preparing maleic anhydride by oxidizing n-butane in the gas phase under heterogeneous catalysis with oxygen-containing gases over a vanadium-, phosphorus- and oxygen-containing catalyst in a reactor unit at a temperature in the range from 350 to 500° C., removing the maleic anhydride formed to form a gas stream which comprises unconverted n-butane and water and recycling at least a portion of the unconverted n-butane to the reactor unit, by feeding to the reactor unit an inlet stream having an n-butane concentration of from 0.5 to 1.5% by volume and an oxygen concentration of from 5 to 21% by volume, establishing a pressure at the inlet to the reactor unit of from 0.4 to 2 MPa abs, and converting from 40 to 100% of the n-butane from the inlet stream per reactor pass.

REFERENCES:
patent: 3474041 (1969-10-01), Kerr et al.
patent: 3904652 (1975-09-01), Frank et al.
patent: 4231943 (1980-11-01), Paradis et al.
patent: 4342699 (1982-08-01), Palmer et al.
patent: 4511670 (1985-04-01), Suciu et al.
patent: 4525471 (1985-06-01), Bremer et al.
patent: 4795818 (1989-01-01), Becker et al.
patent: 4933312 (1990-06-01), Haddad et al.
patent: 5011945 (1991-04-01), Taheri
patent: 5095125 (1992-03-01), Haddad et al.
patent: 5137860 (1992-08-01), Ebner et al.
patent: 5158923 (1992-10-01), Barone
patent: 5275996 (1994-01-01), Andrews et al.
patent: 5296436 (1994-03-01), Bortinger
patent: 5302566 (1994-04-01), Schwartz
patent: 5498731 (1996-03-01), Tsurita et al.
patent: 5532384 (1996-07-01), Shirley et al.
patent: 5641722 (1997-06-01), Mitchell et al.
patent: 5646304 (1997-07-01), Acharya et al.
patent: 5726327 (1998-03-01), Acharya et al.
patent: 6002019 (1999-12-01), Tamhankar et al.
patent: 6040460 (2000-03-01), Bertola et al.
patent: 6803473 (2004-10-01), Weiguny et al.
patent: 6812351 (2004-11-01), Weiguny
patent: 2004/0014990 (2004-01-01), Storck et al.
patent: 391633 (1990-11-01), None
patent: 10211449 (2003-09-01), None
patent: 10211445 (2003-10-01), None
patent: 10211446 (2003-10-01), None
patent: 10211447 (2003-10-01), None
patent: 10235355 (2004-02-01), None
patent: 0029317 (1981-05-01), None
patent: 0099431 (1984-02-01), None
patent: 0690040 (1996-01-01), None
patent: 1004567 (2000-05-01), None
patent: WO-95/26817 (1995-10-01), None
patent: WO-97/12674 (1997-04-01), None
patent: WO-97/43242 (1997-11-01), None
patent: WO-01/68245 (2001-09-01), None
patent: WO-01/68626 (2001-09-01), None
patent: WO-02/22257 (2002-03-01), None
patent: WO-02/34387 (2002-05-01), None
Ullmann's Encyclopedia of Industrial Chemistry, 6th Edition, 2000 Electronic Release, Chapter “Maleic and Fumaric Acid—Maleic Anhydride”.

Affiliated with

Also associated with

Rating

Method for the production of maleic anhydride does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3979850