Patent · US Expired

Barium- and ruthenium-containing perovskite catalysts

US4200554A · kind A · utility

31Cited by
3References
10Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 25, 1978
Grant dateApr 29, 1980
Priority date—
Expiry dateAug 25, 1998

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02T10/12
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

Catalytic compositions having the general formula, ABO.sub.3, and a perovskite crystal structure, wherein the A sites are substantially fully occupied by barium ions. About 1% to 20% of the Type B cation sites are occupied by ions of at least one platinum group metal selected from ruthenium, osmium, rhodium, iridium, palladium and platinum, with ruthenium being present and occupying up to about 10% of the Type B cation sites. The balance of 80% to 99% of the Type B cation sites are occupied by ions of at least one metal having an atomic radius between 0.4 to 1.4 Angstroms. The compositions are useful in gaseous oxidation and reduction reactions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.