Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-01-11
1980-03-18
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252456, 423535, B01J 2702, C01B 1768
Patent
active
041938941
ABSTRACT:
A catalytic material for oxidation of sulfur dioxide to sulfur trioxide at any temperature above 300.degree. C., comprising a catalyst which at reaction conditions is a melt including sulfatized vanadium ions as the active catalytic component and two different promoters and which is dispersed in an inert porous carrier.
The first promoter comprises cesium ions, optionally in combination with ions of another alkali metal such as sodium, potassium or rubidium, known to promote vanadium catalysts. The second promoter comprises ions of a metal such as aluminum, magnesium, yttrium or lanthanum, which does not promote formation of inactive V.sup.4 species and the oxide of which has a heat of formation greater than 100 kcal per oxygen atom and is at least partly soluble in the heavily sulfatized environment of the melt.
REFERENCES:
patent: 1420203 (1922-06-01), MacDowell et al.
patent: 3789019 (1974-01-01), Stiles
patent: 3987153 (1976-10-01), Stiles
"The Promoting Action of Group I Elements and of Lanthanides on Vanadium Catalysts," Brodovich et al., Vanadievyi Katal. dlya Kontaktn. Priovz Sernoi Kisloty Nauch. Issled. Inst. Udobr. i Insektofung. Sb. Statei, 1963, pp. 85-89.
"The Role of Alkali Sulphates in Vanadium Catalysts for Sulphur Dioxide Oxidation," Tandy, G. H., J. Appl. Chem., 6, Feb. 1956, pp. 68-74.
"The Influence of Alkali Metal Sulfates on the Activity of Vanadium Pentoxide in the Catalytic Oxidation of Sulfur Dioxide, Pavel Jiru, Vanadieviye Katal. dlya Kontaktn. Prizv. Kisloty, Nauch. Issled. Inst. Udobr. iInsektofung, Sb. Statei, 1963, pp. 21-35.
Dees Carl F.
Hoffman Arthur E.
Monsanto Company
LandOfFree
Catalyst for oxidation of sulfur dioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst for oxidation of sulfur dioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst for oxidation of sulfur dioxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1123445