Mixed metal large crystal molecular sieve catalyst compositions, catalytic articles, systems and methods
US10792648B2 · kind B2 · utility
1Cited by
4References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2015 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.