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US 6,787,577 B2Granted
Process for the production of highly branched Fischer-Tropsch products and potassium promoted iron catalyst
AssigneeChevron U.S.A. Inc.
InventorsBurtron H. Davis, Stephen J. Miller
Life of this patent
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Abstract
Process for increasing the branching in products from a slurry-type Fischer-Tropsch unit by use of potassium promoted iron-based catalyst, an integrated process for increasing the yield of lubricating base oils, and an iron-based Fischer-Tropsch catalyst composition having a high atomic ratio of potassium promoter.
Claims19
A process for preparing a C5 plus product with high branching from a slurry-type Fischer-Tropsch unit comprising:
- (a) contacting a synthesis gas feed stock in a Fischer-Tropsch reaction zone with a potassium promoted iron catalyst that is substantially free of alumina under slurry-type Fischer-Tropsch reaction conditions, wherein the catalyst is prepared by the co-precipitation of iron and silica, the atomic ratio of iron to potassium in the catalyst is within the range of about 3 to about 15 atoms of potassium per 100 atoms of iron, the atomic ratio of iron to silicon in the catalyst is within the range of about 1 to about 10 atoms of silicon 100 atoms of iron, and the particle size is within the range of from about 30 microns and about 150 microns;
- and
- (b) recovering from the Fischer-Tropsch reaction zone a C5 plus Fischer-Tropsch product having at least 20 mole percent branching.
Dependencies are inferred from the claim text.