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:
Sep. 26, 1978
Filed:
Apr. 28, 1977
Hideo Kawasaki, Tokyo, JP;
Masaji Nakatani, Tokyo, JP;
Toshihiro Ishii, Tokyo, JP;
Hiroshi Nakagawa, Tokyo, JP;
Hiroshi Takaya, Tokyo, JP;
Nissan Engineering Ltd., Tokyo, JP;
Abstract
NO.sub.x is absorbed in an alkaline aqueous solution of a permanganate and/or a manganate and the manganese compounds are reduced to form the precipitate of manganese dioxide. The manganese dioxide is dispersed in an aqueous solution of sodium or potassium hydroxide having a concentration of higher than 20% and a gas containing NO.sub.x having a molar ratio of NO.sub.2 /NO.sub.x of higher than 0.55 is contacted with the dispersion in the presence of a permanganate and/or a manganate at higher than 40.degree. C, to convert manganese dioxide to the permanganate and/or the manganate.