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:
Oct. 06, 1987
Filed:
Oct. 11, 1983
Applicant:
Inventors:
Utah Tsao, Jersey City, NJ (US);
Joseph Kettell, Fair Lawn, NJ (US);
Assignee:
Lummus Crest, Inc., Bloomfield, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; C01F / ; C21B / ;
U.S. Cl.
CPC ...
423563 ; 423244 ; 423242 ; 423165 ; 423178 ; 75 25 ;
Abstract
Spent flux containing calcium oxide and calcium sulfide, recovered from the reduction of iron ore, is carbonated, as an aqueous slurry, in two stages, with the first stage being operated at a pH to prevent reaction of calcium sulfide, and the second stage being operated at a pH at which calcium sulfide is reacted to produce an effluent gas containing hydrogen sulfide.