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. 28, 2011
Filed:
Feb. 26, 2010
Belma Demirel, Longmont, CO (US);
Charles B. Benham, Arvada, CO (US);
Jesse W. Taylor, Westminister, CO (US);
Pandurang V. Nikrad, Boulder, CO (US);
Sara L. Rolfe, Loveland, CO (US);
Olga P. Ionkina, Boulder, CO (US);
Dawid J. Duvenhage, Evergreen, CO (US);
Harold A. Wright, Longmont, CO (US);
Belma Demirel, Longmont, CO (US);
Charles B. Benham, Arvada, CO (US);
Jesse W. Taylor, Westminister, CO (US);
Pandurang V. Nikrad, Boulder, CO (US);
Sara L. Rolfe, Loveland, CO (US);
Olga P. Ionkina, Boulder, CO (US);
Dawid J. Duvenhage, Evergreen, CO (US);
Harold A. Wright, Longmont, CO (US);
Rentech, Inc., Los Angeles, CA (US);
Abstract
A method of producing an iron catalyst for catalyzing the hydrogenation of carbon monoxide is disclosed. The method comprises using a reduced amount of acid for iron dissolution compared to certain previous methods. The resulting acidic iron mixture is heated without boiling to obtain a nitrate solution having a Fe:Feratio in the range of about 0.01%: 99.99% to about 100%:0% (wt:wt). Iron phases are precipitated at a lower temperature compared to certain previous methods. The recovered catalyst precursor is dried and sized to form particles having a size distribution between 10 microns and 100 microns. In embodiments, the Fe:Feratio in the nitric acid solution may be in the range of from about 3%:97% to about 30%:70% (wt:wt) and the calcined catalyst may comprise a maghemite:hematite ratio of about 1%:99% to about 70%:30%.