Sasol Technology Proprietary Limited

Sasol Technology (pty) Limited

Alta Bohmer

Jacobus Lucas Visagie

Jan Van De Loosdrecht

Jan Mattheus Botha

Abdool Muthalib Saib

Michael Steven Datt

Johannes Gerhardus Koortzen

Jacobus Lucus Visagie

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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Alta Bohmer