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US 4,624,968 AGranted
Multi-stage Fischer-Tropsch process
AssigneeExxon Research & Engineering Co.
InventorsChang J. Kim, Rocco A. Fiato
Life of this patent
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Abstract
A multi-stage catalyst system is disclosed for the production of waxes in a Fischer-Tropsch process while producing relatively low quantities of methane. A first catalyst converts CO and H.sub.2 into olefins, while a second catalyst converts the olefin, additional hydrogen and CO into higher molecular weight paraffin.
Claims4
A process for producing paraffinic hydrocarbons from carbon monoxide and hydrogen comprising:
- (a) introducing carbon monoxide and hydrogen into a reaction zone wherein the carbon monoxide and hydrogen contact in a first bed a first catalyst having a high olefin selectivity selected from the group consisting of Fe/Ce/Zn/K, Fe/Mn/K and Fe/Co/K;
- and
- (b) contacting the resulting olefin in a second bed with a second catalyst having a high selectivity for converting olefins to heavier paraffinic hydrocarbons selected from the group consisting of Ru/TiO.sub.2, Ru/SiO.sub.2 and Ru/Al.sub.2 O.sub.3.
Dependencies are inferred from the claim text.