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:
Nov. 22, 1994
Filed:
May. 10, 1993
Applicant:
Inventors:
Charles C Chou, Houston, TX (US);
Chaoliang Yao, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ;
U.S. Cl.
CPC ...
423235 ; 4232421 ; 42324301 ; 42324307 ;
Abstract
A process for removing NO.sub.x and/or SO.sub.x from a gaseous stream by oxidation with a fine flocculent acidic catalyst slurry which is regenerable during the process, in particular by pH adjustment in the absence of added heat. The catalyst slurry comprises MnO.sub.2, Mn.sub.2 O.sub.3, and Mn.sub.3 O.sub.4 having pH in the range from about 0.5 to about 6.5 and is prepared by aerating a divalent manganous salt in an aqueous solution having a pH in the range from about 8.0 to about 13.5.