Iron-promoted zeolite and catalyst made therefrom
US11931729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2020 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Aug 12, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure provides a method of forming a selective catalytic reduction (SCR) catalyst, the method including receiving a first iron-promoted zeolite having a first iron content, and treating the iron-promoted zeolite with additional iron in an ion exchange step to form a second iron-promoted zeolite with a second iron content, the second iron content being higher than the first iron content. A selective catalytic reduction (SCR) catalyst composition including an ironpromoted zeolite having at least about 6 weight percent iron, based on total weight of the ironpromoted zeolite, wherein the iron content of the zeolite was added to the zeolite in at least two separate steps is also provided herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.