Catalysts

Details Catalysts Catalysts

2008-05-05

2011-11-29

Nguyen, Cam N. (Department: 1736)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S104000, C502S260000, C502S327000, C502S439000

Reexamination Certificate

active

08067333

ABSTRACT:
A process for producing a supported cobalt-based Fischer-Tropsch synthesis catalyst includes, in a first activation stage, treating a particulate catalyst precursor with a reducing gas, at a heating rate, HR1, until the precursor has reached a temperature, T1, where 80° C.≦T1≦180° C., to obtain a partially treated precursor. In a second activation stage, the partially treated precursor is treated with a reducing gas, at an average heating rate, HR2, with x step increments, where 0<HR2<HR1, for a time, t1, where t1is from 0.1 to 20 hours, to obtain a partially reduced precursor. Thereafter, in a third activation stage, the partially reduced precursor is treated with a reducing gas, at a heating rate, HR3, where HR3>HR2 until the partially reduced precursor reaches a temperature, T2. The partially reduced precursor is maintained at T2for a time, t2, where t2is from 0 to 20 hours, to obtain an activated catalyst.

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European Patent Office PCT Written Opinion of the ISA, International Application PCT/IB2008/051724, mailed Jan. 22, 2009.
European Patent Office PCT International Preliminary Report on Patentability, International Application PCT/IB2008/051724, completed Jul. 27, 2009.

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