Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-09-09
1983-02-22
Gantz, Delbert E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252437, B01J 2714
Patent
active
043747566
ABSTRACT:
Catalytic material is provided by a composition comprising the elements vanadium, non-water-contained hydrogen, phosphorus and non-water-contained oxygen. The VHPO elements are present in a relatively fixed atomic ratio range, there being more non-water-contained oxygen present than phosphorus by an atomic ratio of greater than five to one. The catalytic material comprises an anhydrous primary component having vanadium of mixed valence, hydrogen, phosphorus and oxygen in an empirical relationship defined by VH.sub.x PO.sub.y, wherein "x" has an average value in a range from about 1.29 to about 1.40, and "y" has an average value in a range from about 5.46 to about 5.55. The anhydrous VHPO catalytic material may also be described by a structural formula (VO).sub.m (VO.sub.2).sub.n H.sub.2n (PO.sub.4).sub.n (P.sub.2 O.sub.7).sub.m/2, wherein m+n=3, "m" has an average value in a range from about 0.90 to about 1.07, and "n" has an average value in a range from about 1.93 to about 2.10. The primary component is mostly amorphous and in its substantially anhydrous form is characterized by a powder X-ray diffraction pattern having broad peaks with CuK.alpha. d-spacings of 4.30, 4.17 and 3.09 A. The catalytic material is prepared by a process comprising the steps of reducing vanadium pentoxide with a reducing agent in an aqueous solution of phosphoric acid, followed by the step of oxidizing a portion of the vanadium species with an oxidizing agent to form a slurry of a precipitate containing vanadium(IV) and vanadium(V) in contact with a water solution containing vanadium(IV).
REFERENCES:
patent: 3474041 (1969-10-01), Kerr
patent: 3864280 (1975-02-01), Schneider
patent: 3888886 (1975-06-01), Young et al.
patent: 3907707 (1975-09-01), Raffelson et al.
patent: 3975300 (1976-08-01), Burness
patent: 3977998 (1976-08-01), Freerks et al.
patent: 4013586 (1977-03-01), Dolan et al.
Selective Oxidation of Butene into Maleic Anhydride K. Zeebot et al. Ukran. Khim., Zhur., vol. 43, 842, (1977).
Harju Philip H.
Pasek Eugene A.
Brumback Oscar B.
Gantz Delbert E.
Keane J. Timothy
Koppers Company Inc.
Wright William G.
LandOfFree
Vanadium-hydrogen-phosphorus-oxygen catalytic material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vanadium-hydrogen-phosphorus-oxygen catalytic material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vanadium-hydrogen-phosphorus-oxygen catalytic material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1372532