Patent EA-004578-B1 (EA)
Title: Reducing fischer-tropsch catalyst attrition losses in high agitation reaction systems
Inventor: SINGLETON ALAN R
IPC: C07B37/04
Filed: 2000-05-15
Abstract: 1. A catalyst used in hydrocarbon synthesis processes conducted in high agitation reaction systems, said method comprising a gamma-alumina support, wherein said gamma-alumina support includes an amount of titanium. 2. The catalyst of claim 1 wherein said titanium is present in said gamma-alumina support in an amount of at least 800 parts per million by weight. 3. The catalyst of claim 1 wherein said titanium is present in said gamma-alumina support in an amount of at least 1000 parts per million by weight. 4. The catalyst of claim 1 wherein said titanium is present in said gamma-alumina support in an amount in the range of from about 1000 to 2000 parts per million by weight. 5. The catalyst of claim 1 wherein said gamma-alumina support has been produced from spray-dried, synthetic boehmite. 6. The catalyst of claim 1 wherein said gamma-alumina support has been produced from synthetic boehmite and wherein said titanium is added to said gamma-alumina support prior to the crystallization of said synthetic boehmite. 7. The catalyst of claim 6 wherein said gamma-alumina support having: substantially a spheroidal shape; an average particle size in the range of from about 10 to about 150 mum; a BET surface area, after calcination, in the range of from about 200 to about 260 m<2>/g; and a porosity in the range of from about 0.4 to about 1.0 cm<3>/g. 8. The catalyst of claim 1 wherein said gamma-alumina support has been treated, after calcination, but prior to adding any catalytically active substance, with an acidic aqueous solution, having acidity level effective for increasing the attrition resistance of said catalyst. System. 9. The catalyst of claim 8 wherein said acidic aqueous solution has a pH of not more than 5. 10. The catalyst of claim 8 wherein said acidic aqueous solution has a pH of not more than 3. 11. The catalyst of claim 8 wherein said aqueous solution has a pH in the range of from 3 to 1. 12. The catalyst of claim 1 wherein said catalyst comprises cobalt supported on said gamma-alumina support in the range of from about 10 to about 70 parts by weight (pbw) per 100 pbw of said y-alumina support. 13. The catalyst of claim 1 wherein said cobalt and said ruthenium have been applied to said -gamma alumina support by totally aqueous coimpregnation using an effective composition, and an effective amount, of an aqueous solution to achieve incipient wetness of said gamma-alumina support with said selected amount of said cobalt. 14. The catalyst of claim 13 wherein said aqueous solution comprises cobalt nitrate. 15. The catalyst of claim 13 wherein said acidic aqueous solution has a pH of not more than 5. 16. The catalyst of claim 13 wherein said aqueous solution has a pH in the range of from 3 to 1. 17. The catalyst of claim 12 wherein said selected amount of said cobalt is in the range of from about 15 pbw to about 55 pbw per 100 pbw of said gamma-alumina support. 18. The catalyst of claim 12 wherein said selected amount of said cobalt is in the range of from about 20 pbw to about 45 pbw per 100 pbw of said gamma-alumina support. 19. The catalyst of claim 12 wherein said selected amount of said cobalt comprises about 30% by weight per total mass of said catalyst. 20. The catalyst of claim 12 wherein said catalyst is promoted with a selected amount of ruthenium. 21. The catalyst of claim 20 wherein said ruthenium is present in an amount in the range of from 0.1 pbw to 8.0 pbw per 100 pbw of said gamma-alumina support. 22. The catalyst of claim 20 wherein said ruthenium is present in an amount in the range of from about 0.2 pbw to about 1.5 pbw per 100 pbw of said gamma-alumina support. 23. The catalyst of claim 20 wherein said cobalt and said ruthenium have been applied to said y-alumina support by totally aqueous coimpregnation using an effective composition, and an effective amount, of an aqueous solution to achieve incipient wetness of said gamma-alumina support with said selected amounts of said cobalt and said ruthenium. 24. The catalyst of claim 20 wherein said aqueous solution comprises cobalt nitrate. 25. The catalyst of claim 23 wherein said acidic aqueous solution has a pH of not more than 5. 26. The catalyst of claim 23 wherein said aqueous solution has a pH in the range of from 3 to 1. 27. The catalyst of claim 1 wherein said high agitation reaction system is a three phase reaction system. 28. The catalyst of claim 1 wherein said high agitation reaction system is a slurry bubble column reactor system.