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:
Jun. 17, 1986
Filed:
Aug. 31, 1982
Applicant:
Inventors:
Jens Andreasen, Espergaerde, DK;
James R Donnelly, Ballerup, DK;
Karsten S Felsvang, Allerod, DK;
Ebbe S Jons, Vaerlose, DK;
Preston L Veltman, Severna Park, MD (US);
Assignee:
A/S Niro Atomizer, Soborg, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; B01J / ; C01D / ; C01F / ;
U.S. Cl.
CPC ...
423242 ; 423166 ; 423551 ; 423555 ; 423D / ; 423244 ;
Abstract
Spent absorbents resulting from desulfurization of flue gas in a spray drying-absorption process contain substantial amounts of sulfite, e.g. calcium sulfite. Said sulfite is oxidized into sulfate by heating of the spent absorbent in the presence of an oxygen-containing gas, preferably at temperatures of 350.degree.-600.degree. C. Thereby the spent absorbents may be converted into materials having industrial utility.