Precipitated iron catalyst for hydrogenation of carbon monoxide

Details Precipitated iron catalyst for hydrogenation of carbon monoxide Precipitated iron catalyst for hydrogenation of carbon monoxide

2011-06-28

2011-06-28

Nguyen, Cam N (Department: 1793)

Chemistry: fischer-tropsch processes; or purification or recover

Group ib metal containing catalyst utilized for the...

C502S330000, C502S331000, C502S338000

Reexamination Certificate

active

07968611

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 Fe2+:Fe3+ratio 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 Fe2+:Fe3+ratio 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%.

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International Application No. PCT/US2008/072778 International Search Report dated Dec. 22, 2008, 8 pages.

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