Patent · US Active

Method for removing N2O and NOx from the nitric acid production process, and an installation suitable for same

US9738521B2 · kind B2 · utility

2Cited by

4References

23Claims

0Family size

Assignee

thyssenkrupp Uhde GmbH · DE

Inventors

Meinhard Schwefer · Meschede, DE
Rolf Siefert · Rheda-Wiedenbrück, DE
Jürgen Fuchs · Sand, DE
Klaus Ruthardt · Dortmund, DE
Michael Groves · Gevelsberg, DE

Key dates

Filing date	Feb 14, 2012
Grant date	Aug 22, 2017
Priority date	—
Expiry date	Feb 14, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/151
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process and apparatus for preparing nitric acid by catalytic oxidation of NH3 by means of oxygen and subsequent reaction of the NOx formed with an absorption medium in an absorption tower, which comprises a catalyst bed for N2O decomposition arranged in the process gas downstream of the catalytic NH3 oxidation and upstream of the absorption tower in the flow direction and a catalyst bed for NOx reduction and effecting a further decrease in the amount of N2O arranged in the tailgas downstream of the absorption tower in the flow direction,

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