The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Oct. 03, 2018
Applicant:
Casale SA, Lugano, CH;
Inventors:
Assignee:
Casale SA, Lugano, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 21/26 (2006.01); B01J 21/06 (2006.01); B01J 23/22 (2006.01); B01J 29/072 (2006.01); B01J 35/00 (2006.01); B01D 53/86 (2006.01);
U.S. Cl.
CPC ...
B01D 53/8625 (2013.01); B01J 21/063 (2013.01); B01J 23/22 (2013.01); B01J 29/072 (2013.01); B01J 35/0006 (2013.01); C01B 21/26 (2013.01); B01D 2251/2062 (2013.01);
Abstract
A nitric acid production process, comprising tertiary abatement of N2O and NOx on a tail gas withdrawn from an absorption stage, said abatement including passing the tail gas over a sequence of a deN2O stage comprising a Fe-z catalyst and a deNOx stage comprising a V2O5-TiO2 catalyst in the presence of gaseous ammonia, wherein the tail gas at the inlet of deN2O stage and the tail gas at the inlet of deNOx stage have a temperature greater than 400° C.