Process for reducing the content of NOx and N2O from a tail gas of a nitric acid process
US11925900B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Feb 19, 2019 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Feb 19, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for reducing the content of NOx and N2O from an input tail gas of a nitric acid process, said input tail gas having a temperature lower than 400° C., the process comprising an abatement stage at least including a deN2O stage and deNOx stage and providing a conditioned tail gas having a temperature greater than the input tail gas, wherein, prior to submission to said abatement stage, said input tail gas is pre-heated to a temperature of at least 400° C. by indirect heat exchange with at least a portion of said conditioned gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.