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:
Aug. 31, 2021
Filed:
Jun. 18, 2018
Applicant:
Casale SA, Lugano, CH;
Inventor:
Giacomo Colmegna, Baden, CH;
Assignee:
CASALE SA, Lugano, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/02 (2006.01); C01B 21/04 (2006.01); C01B 23/00 (2006.01); F25J 3/06 (2006.01);
U.S. Cl.
CPC ...
C01B 23/0094 (2013.01); B01D 53/02 (2013.01); C01B 21/0422 (2013.01); C01B 21/0433 (2013.01); C01B 21/0494 (2013.01); C01B 23/0026 (2013.01); C01B 23/0036 (2013.01); F25J 3/06 (2013.01); B01D 2253/116 (2013.01); B01D 2256/10 (2013.01); B01D 2256/18 (2013.01); B01D 2257/404 (2013.01); B01D 2257/504 (2013.01); C01B 2210/0006 (2013.01); C01B 2210/0009 (2013.01); C01B 2210/0034 (2013.01); C01B 2210/0051 (2013.01); C01B 2210/0075 (2013.01); C01P 2006/80 (2013.01);
Abstract
A process comprising: subjecting a process gas containing NOx to a stage for absorption of NOx in a suitable absorption means, obtaining nitric acid and a tail gas containing nitrogen, argon and residual NOx; subjecting said tail gas to a treatment which comprises at least one NOx removal stage, obtaining a conditioned tail gas; subjecting at least a portion of said conditioned tail gas to a separation treatment, obtaining a product stream containing argon and a product stream containing nitrogen.