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. 04, 2013
Filed:
Feb. 28, 2012
Ann Copenhafer, Yardley, PA (US);
William C. Copenhafer, Yardley, PA (US);
FMC Wyoming Corporation, Philadelphia, PA (US);
Abstract
A method for removing sulfide from an aqueous alkali solution in which hydrogen peroxide is introduced into a sulfide-containing aqueous alkali solution associated with an alkali mineral recovery operation. The method is particularly useful for the processing of sulfide-containing aqueous alkali solutions containing NaHCOand NaCO, where bicarbonate in the sulfide-depleted alkali solution is decomposed to form NaCO, with concurrent evolution of gaseous carbon dioxide byproduct but without formation of gaseous HS as a pollutant, and where NaCOvalues are subsequently recovered from the sulfide-depleted carbonate-rich alkali solution via a crystallization operation.