Sasol Technology Proprietary Limited

Sasol Technology (pty) Limited

Cornelia Carolina Eloff

Jacobus Lucas Visagie

Jan Van De Loosdrecht

Sean Barradas

Hendrik Van Rensburg

A process for preparing a cobalt-containing hydrocarbon synthesis catalyst precursor includes calcining a loaded catalyst support comprising a catalyst support supporting a cobalt compound. The calcination includes heating the loaded catalyst support over a heating temperature range of 90&#xb0; C. to 220&#xb0; C. using (i) one or more high heating rate periods during the heating over the heating temperature range wherein heating of the loaded catalyst support takes place at a heating rate of at least 10&#xb0; C./minute, and wherein a gas velocity of at least 5 m/kg cobalt compound/hour is effected over the loaded catalyst support, and (ii) one or more low heating rate periods during the heating over the heating temperature range wherein heating of the loaded catalyst support takes place at a heating rate of less than 6&#xb0; C./minute. The cobalt compound is thereby calcined, with a cobalt-containing hydrocarbon synthesis catalyst precursor being produced.

Process for preparing a cobalt-containing hydrocarbon synthesis catalyst precursor

A process for preparing a cobalt-containing hydrocarbon synthesis catalyst precursor includes calcining a loaded catalyst support comprising a catalyst support supporting a cobalt compound. The calcination includes subjecting the loaded catalyst support to heat treatment by heating the loaded catalyst support to a temperature, T, of at least 220&#xb0; C. at a heating rate below 10&#xb0; C./minute, and effecting gas flow at a space velocity of at least 9 mn/kg cobalt compound/hour over the loaded catalyst support during at least part of the heating. The cobalt-containing hydrocarbon synthesis catalyst precursor is thereby produced.

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Sasolburg, South Africa

Cornelia Carolina Eloff