Niobium-doped vanadium/phosphorus mixed oxide catalyst

Details Niobium-doped vanadium/phosphorus mixed oxide catalyst Niobium-doped vanadium/phosphorus mixed oxide catalyst

2004-09-15

2009-12-29

Hailey, Patricia L (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S208000, C502S353000, C549S233000

Reexamination Certificate

active

07638457

ABSTRACT:
Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.

REFERENCES:
patent: 3255211 (1966-06-01), Kerr
patent: 4147661 (1979-04-01), Higgins et al.
patent: 4594433 (1986-06-01), Suciu et al.
patent: 4654425 (1987-03-01), Suciu et al.
patent: 4668652 (1987-05-01), Fumagalli et al.
patent: 4732885 (1988-03-01), Edwards et al.
patent: 4950769 (1990-08-01), McCandless et al.
patent: 5019545 (1991-05-01), Haddad et al.
patent: 5095125 (1992-03-01), Haddad et al.
patent: 5137860 (1992-08-01), Ebner et al.
patent: 5474960 (1995-12-01), Bremer et al.
patent: 5506187 (1996-04-01), Haddad et al.
patent: 5847163 (1998-12-01), Mazzoni et al.
patent: 6734135 (2004-05-01), Albonetti et al.
patent: 2004/0162217 (2004-08-01), Albonetti et al.
patent: 0098039 (1984-01-01), None
patent: 0804963 (1997-11-01), None
patent: 1514598 (2005-03-01), None
patent: 00/72963 (2000-12-01), None
Duarte De Farias, A.M., et al., Journal of Catalysis, Academic Press, Duluth, MN, US, vol. 208, No. 1 (May 15, 2002), pp. 238 to 246.
Hutchings, G.J., Appl. Catal., (1991), 72, 1-32.
Stud. Surf. Sci. Catal., “Preparation of Catalysts VI”, vol. 91, Elsevier Science (1995) p. 1.
Mastuura, I.I., et al. Catal. Today, (1996), 28, 133-138.
Pries de Oliveira, P.G., et al., Catal. Today (2000), 57, 177-186.

Affiliated with

Also associated with

Rating

Niobium-doped vanadium/phosphorus mixed oxide catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Niobium-doped vanadium/phosphorus mixed oxide catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Niobium-doped vanadium/phosphorus mixed oxide catalyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4122896