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:
Apr. 05, 2022
Filed:
Feb. 01, 2018
Casale SA, Lugano, CH;
Iacopo Cerea, Lugano, CH;
Jean François Granger, Angoulins, FR;
Casale SA, Lugano, CH;
Abstract
A dual-pressure plant for the synthesis of nitric acid comprising: a reactor () providing a gaseous effluent () containing nitrogen oxides; an absorption tower () nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor () elevating the pressure of the reactor effluent () to the absorption pressure; said plant also comprising a first bleacher () and a second bleacher (), said first bleacher () stripping with air () nitrogen oxides from the output stream () of the absorption tower () providing a partially stripped nitric acid stream () and a nitrogen oxides-loaded air stream (), the former being fed to the second bleacher () and the latter being recycled to the delivery-side of said compressor ().