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. 01, 1992
Filed:
Aug. 31, 1990
Bernard J Lerner, Pittsburgh, PA (US);
Beco Engineering Company, Oakmont, PA (US);
Abstract
A nitric acid producing plant including an absorber and a closed vessel. Nitric acid having nitrous acid in solution is produced in the absorber by reacting to the oxides of nitrogen derived from the decomposition of ammonia with water. There is also an oxygen cylinder which supplies oxygen under pressure differential to the vessel. The pressure of the stagnant oxygen in the vessel exceeds atmospheric pressure. The plant also includes means for passing the nitric acid solution from the absorber to the vessel under positive differential pressure and means for recycling to the absorber the product of the reaction of the nitric acid solution and the oxygen. The liquid which is recycled to the absorber absorbs NO at a higher rate than NO.sub.2.