초록 ▼

A process is described for converting synthesis gas in the presence of a catalyst comprising at least one group VIII element dispersed on a support comprising alumina modified by aqueous impregnation of quaternary ammonium silicate and comprising in the range of about 3% by weight to about 9.5% by w

A process is described for converting synthesis gas in the presence of a catalyst comprising at least one group VIII element dispersed on a support comprising alumina modified by aqueous impregnation of quaternary ammonium silicate and comprising in the range of about 3% by weight to about 9.5% by weight of silica. Said support can optionally also comprise at least one oxide selected from the group formed by rare earth oxides, alkaline-earth oxides and zirconium oxide.

대표청구항 ▼

1. A process for converting synthesis gas to C5+ hydrocarbons, said synthesis gas comprising carbon monoxide and hydrogen, said process comprising reacting said synthesis gas under conversion conditions in the presence of a catalyst comprising at least one group VIII element dispersed on a support c

1. A process for converting synthesis gas to C5+ hydrocarbons, said synthesis gas comprising carbon monoxide and hydrogen, said process comprising reacting said synthesis gas under conversion conditions in the presence of a catalyst comprising at least one group VIII element dispersed on a support comprising alumina impregnated with quaternary ammonium silicate and comprising in the range of about 3% by weight to about 9.5% by weight of silica. 2. A process according to claim 1, in which the support comprises in the range of about 4% by weight to about 9.5% by weight of silica. 3. A process according to claim 1, in which the specific surface area of said support is in the range of 160 to 250 m2/g. 4. A process according to claim 1, in which the support further comprises at least one oxide selected from the group consisting of rare earth oxides, alkaline-earth oxides and zirconium oxide. 5. A process according to claim 1, in which the catalyst also comprises at least one additional element selected from the group consisting of molybdenum, tantalum, platinum, palladium and ruthenium. 6. A process according to claim 5, in which the amount of the additional element is in the range of 0.01% to 10% by weight. 7. A process according to claim 1, in which the group VIII element is cobalt. 8. A process according to claim 1, in which the support comprising alumina is in the form of a fine calibrated powder with a grain size of less than 800 μm and conducting the conversion in a three-phase reactor containing the catalyst. 9. A process according to claim 8, in which the three-phase reactor is a slurry bubble column. 10. A process according to claim 1, in which the alumina used to prepare the support is in the form of spheres or extrudates with an equivalent diameter in the range of 1 to 10 mm, and conducting the conversion in a fixed bed reactor containing the catalyst. 11. A process according to claim 1, in which the alumina is a gamma alumina. 12. A process according to claim 7, in which the cobalt content is in the range of 1% by weight to 30% by weight. 13. A process according to claim 4, in which the catalyst also comprises at least one additional element selected from the group consisting of molybdenum, tantalum, platinum, palladium and ruthenium. 14. A process according to claim 4, in which the group VIII element is cobalt. 15. A process according to claim 5, in which the group VIII element is cobalt. 16. A process according to claim 13, in which the group VIII element is cobalt. 17. A process according to claim 16, in which the specific surface area of said support is in the range of 160 to 259 m2/g. 18. A process according to claim 1, wherein said hydrocarbons constitute a mixture of linear and saturated hydrocarbons containing at least 50% by weight of C5+ hydrocarbons and less than 20% by the weight of methane. 19. A process according to claim 18, wherein the hydrocarbons comprise at least 60% by weight of the C5+ hydrocarbon and less than 10% by weight of methane. 20. A process according to claim 18, wherein the hydrocarbons comprise at least 70% by weight of the C5+ hydrocarbon and less than 7% by weight of methane. 21. A process according to claim 1, wherein the alumina is impregnated with an aqueous solution of said quaternary ammonium silicate.