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:
Aug. 12, 2003
Filed:
Jan. 31, 2002
Applicant:
Inventors:
Francis R. Alix, Rye, NH (US);
Joanna L. Duncan, Sanford, ME (US);
Christopher R. McLarnon, Exeter, NH (US);
Assignee:
Powerspan Corp., New Durham, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 1/720 ;
U.S. Cl.
CPC ...
C01B 1/720 ;
Abstract
A process and apparatus for removing SO from a gas stream having the steps of scrubbing the SO with an ammonia scrubbing solution and removing any aerosols generated by the scrubbing in a wet electrostatic precipitator. The scrubbing solution is maintained at a pH between 6 and 8 to increase the speed of absorption of SO , to Increase the ratio of sulfite to bisulfite which also facilitates the oxidation of SO , and to avoid the need to use exotic, corrosion resistant alloys. Ammonium sulfate, a valuable fertilizer, can be withdrawn from the scrubbing solution.