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:
May. 22, 1979
Filed:
Nov. 14, 1977
Applicant:
Inventor:
Ralph Miller, Pleasantville, NY (US);
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ;
U.S. Cl.
CPC ...
423523 ; 423531 ;
Abstract
Mixtures of nitric acid and sulfuric acid containing in excess of 70% sulfuric acid are denitrated by the addition of sufficient sulfur dioxide to such mixtures to convert the nitric acid to gaseous nitrogen oxides and vaporizing them from the solution in which they are formed. The process is particularly valuable for the treatment of spent nitration acids.