Catalyst for catalytic reduction of nitrogen oxide
US5380692A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1992 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Sep 11, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/525
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for catalytic reduction of nitrogen oxide using at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound is described, which includes an oxide represented by formula (V): EQU A.sup.5.sub.x B.sup.3.sub.3-x C.sup.4.sub.3 O.sub.7 (V) wherein A.sup.5 represents at least one element selected from the group consisting of La, Y, Ce, Pr, Nd, Sm, Eu, and Gd; B.sup.3 represents at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Pb, Zn, and Ag; C.sup.4 represents at least one element selected from the group consisting of Mn, Co, Fe, Ni, Cr, Cu, V, Mo, W, Ti, Zr, Nb, Pd, Rh, Ru, and Pt; and x is a number of from 0 to 1, supported on a solid acid carrier. Also, methods for catalytic reduction of nitrogen oxide are described including reacting nitrogen oxide with at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound in the presence of oxygen and a specific catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.