Promoted iron-cobalt spinel catalyst for Fischer-Tropsch processes
AssigneeExxon Research & Engineering Co.
InventorsRocco A. Fiato, Stuart L. Soled, Angelo A. Montagna
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Abstract
Iron-cobalt spinels which contain low levels of cobalt, in an iron/cobalt atomic ratio of 7:1 to 35:1, are converted to Fischer-Tropsch catalysts upon reduction and carbiding that exhibit high activity and selectivity to C.sub.2 --C.sub.6 olefins and low CH.sub.4 production.
Claims19
A hydrocarbon synthesis catalyst composition comprising an unsupported, Group IA or IIA metal salt promoted iron-cobalt single phase spinel, said spinel having the initial empirical formula:
- Fe.sub.x Co.sub.y O.sub.4
- wherein x and y are integer or decimal values, other than zero, with the proviso that the sum of x+y is 3 and the ratio of x/y is 7:1 or above, said spinel exhibiting a powder X-ray diffraction pattern substantially isostructural with Fe.sub.3 O.sub.4 and said spinel having an initial BET surface area of up to about 5 m.sup.2 /g.
A hydrocarbon synthesis catalyst composition comprising an unsupported, Group IA or IIA metal hydroxide promoted iron-cobalt single phase spinel, said spinel having the initial empirical formula:
- Fe.sub.x Co.sub.y O.sub.4
- wherein x and y are integer or decimal values, other than zero, with the proviso that the sum of x+y is 3 and the ratio of x/y is 7:1 or above, said spinel exhibiting a powder x-ray diffraction pattern substantially isostructural with Fe.sub.3 O.sub.4 and said spinel having an initial BET surface area of up to about 5 m.sup.2 /g.
Dependencies are inferred from the claim text.