High surface area, small crystallite size catalyst for...

Details High surface area, small crystallite size catalyst for... High surface area, small crystallite size catalyst for...

2001-05-08

2008-11-18

Nguyen, Cam N. (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S065000, C502S066000, C502S073000, C502S074000, C502S241000, C502S245000, C502S247000, C502S248000, C502S252000, C502S253000, C502S255000, C502S257000, C502S259000, C502S260000, C502S261000, C502S262000, C502S302000, C502S303000, C502S304000, C502S306000, C502S307000, C502S309000, C502S312000, C502S313000, C502S314000, C502S315000, C502S316000, C502S318000, C502S320000, C502S322000, C502S323000, C502S328000, C502S329000, C502S331000, C502S332000, C502S333000, C502S334000, C502S335000, C502S336000, C502S

Reexamination Certificate

active

07452844

ABSTRACT:
The Fischer-Tropsch catalyst of the present invention is a transition metal-based catalyst having a high surface area, a smooth, homogeneous surface morphology, an essentially uniform distribution of cobalt throughout the support, and a small metal crystallite size. In a first embodiment, the catalyst has a surface area of from about 100 m2/g to about 250 m2/g; an essentially smooth, homogeneous surface morphology; an essentially uniform distribution of metal throughout an essentially inert support; and a metal oxide crystallite size of from about 40 Å to about 200 Å. In a second embodiment, the Fischer-Tropsch catalyst is a cobalt-based catalyst with a first precious metal promoter and a second metal promoter on an aluminum oxide support, the catalyst having from about 5 wt % to about 60 wt % cobalt; from about 0.0001 wt % to about 1 wt % of the first promoter, and from about 0.01 wt % to about 5 wt % of the second promoter.The high surface area transition metal-based catalysts of the present invention are prepared in a non-acidic solution at a pH greater than about 7.0 , and starting with a non-acidic transition metal complex. The resulting product is a catalyst with a uniform distribution of metal throughout the catalyst particles, with a smooth and homogeneous surface morphology, and with slow crystallite growth upon heating.

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