Sasol Technology Proprietary Limited

Jacobus Lucus Visagie

Jan Van De Loosdrecht

Jan Mattheus Botha

Abdool Muthalib Saib

Michael Steven Datt

Johannes Gerhardus Koortzen

Alta Bohmer

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, T, where 80&#xb0; C.&#x2266;T&#x2266;180&#xb0; 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&#x3c;HR2&#x3c;HR1, for a time, t, where tis 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&#x3e;HR2 until the partially reduced precursor reaches a temperature, T. The partially reduced precursor is maintained at Tfor a time, t, where tis from 0 to 20 hours, to obtain an activated catalyst.

Catalysts

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, T, where 80&#xb0; C.&#x2266;T&#x2266;180&#xb0; C., to obtain a partially treated precursor. In a second activation stage, the partially treated precursor is treated with a reducing gas, at a heating rate, HR2, where 0&#x2266;HR2&#x3c;HR1, for a time, t, where tis 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&#x3e;HR2 until the partially reduced precursor reaches a temperature, T. The partially reduced precursor is maintained at Tfor a time, t, where tis from 0 to 20 hours, to obtain an activated catalyst.

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Sasolburg, South Africa

Jacobus Lucus Visagie