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:
Feb. 03, 2015
Filed:
May. 29, 2009
Pandurang V. Nikrad, Boulder, CO (US);
Jesse W. Taylor, Westminster, CO (US);
Richard A. Bley, Longmont, CO (US);
Danny M. Dubuisson, Longmont, CO (US);
Sara L. Rolfe, Loveland, CO (US);
Belma Demirel, Longmont, CO (US);
Dawid J. Duvenhage, Evergreen, CO (US);
Harold A. Wright, Longmont, CO (US);
Pandurang V. Nikrad, Boulder, CO (US);
Jesse W. Taylor, Westminster, CO (US);
Richard A. Bley, Longmont, CO (US);
Danny M. Dubuisson, Longmont, CO (US);
Sara L. Rolfe, Loveland, CO (US);
Belma Demirel, Longmont, CO (US);
Dawid J. Duvenhage, Evergreen, CO (US);
Harold A. Wright, Longmont, CO (US);
Res USA, LLC., Commerce City, CO (US);
Abstract
A method of producing stable ferrous nitrate solution by dissolving iron in nitric acid to form a ferrous nitrate solution and maintaining the solution at a first temperature for a first time period, whereby the Fe(II) content of the ferrous nitrate solution changes by less than about 2% over a second time period. A method of producing stable Fe(II)/Fe(III) nitrate solution comprising ferrous nitrate and ferric nitrate and having a desired ratio of ferrous iron to ferric iron, including obtaining a stable ferrous nitrate solution; dissolving iron in nitric acid to form a ferric nitrate solution; maintaining the ferric nitrate solution at a second temperature for a third time period; and combining amounts of stable ferrous nitrate solution and ferric nitrate solution to produce the stable Fe(II)/Fe(III) nitrate solution. A method of preparing an iron catalyst is also described.