Chemistry: fischer-tropsch processes; or purification or recover – Liquid phase fischer-tropsch reaction
Reexamination Certificate
2007-10-19
2008-11-11
Nguyen, Cam N. (Department: 1793)
Chemistry: fischer-tropsch processes; or purification or recover
Liquid phase fischer-tropsch reaction
C502S263000, C502S355000, C502S415000, C502S439000
Reexamination Certificate
active
07449496
ABSTRACT:
A stabilized catalyst support having improved hydrothermal stability, catalyst made therefrom, and method for producing hydrocarbons from synthesis gas using said catalyst. The stabilized support is made by a method comprising treating a crystalline hydrous alumina precursor in contact with at least one structural stabilizer or compound thereof. The crystalline hydrous alumina precursor preferably includes an average crystallite size selected from an optimum range delimited by desired hydrothermal resistance and desired porosity. The crystalline hydrous alumina precursor preferably includes an alumina hydroxide, such as crystalline boehmite, crystalline bayerite, or a plurality thereof differing in average crystallite sizes by at least about 1 nm. The crystalline hydrous alumina precursor may be shaped before or after contact with the structural stabilizer or compound thereof. The treating includes calcining at 450° C. or more. Preferred structural stabilizers can include cobalt, magnesium, manganese, manganese, zirconium, boron, aluminum, barium, silicon, lanthanum, oxides thereof, or combinations thereof.
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Van De Loosdrecht et al, Database Caplus on STN, Chemical Abstract (Columbus, Ohio, USA), AN 2000:795147; “Support Modification for Cobalt Based Slurry Phase Pischer-Tropsch Catalysts”, American Chemical Society (2000) 220th, Fuel 048 (1 p.).
Espinoza Rafael L.
Fjare Kristi A.
Jin Yaming
Jothimurugesan Kandaswamy
Ortego Beatrice C.
ConocoPhillips Company
Nguyen Cam N.
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