Patent number: 8067333
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 t1 is 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 T2 for a time, t2, where t2 is from 0 to 20 hours, to obtain an activated catalyst.
Type:
Grant
Filed:
May 5, 2008
Date of Patent:
November 29, 2011
Assignee:
Sasol Technology (Proprietary) Limited
Inventors:
Jacobus Lucus Visagie, Jan Mattheus Botha, Johannes Gerhardus Koortzen, Michael Steven Datt, Alta Bohmer, Jan Van De Loosdrecht, Abdool Muthalib Saib
Patent number: 8062992
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 a heating rate, HR2, where 0?HR2<HR1, for a time, t1, where t1 is 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 T2 for a time, t2, where t2 is from 0 to 20 hours, to obtain an activated catalyst.
Type:
Grant
Filed:
May 5, 2008
Date of Patent:
November 22, 2011
Assignee:
Sasol Technology (Proprietary) Limited
Inventors:
Jacobus Lucus Visagie, Jan Mattheus Botha, Johannes Gerhardus Koortzen, Michael Steven Datt, Alta Bohmer, Jan Van De Loosdrecht, Abdool Muthalib Saib
Publication number: 20100152035
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 a heating rate, HR2, where 0?HR2<HR1, for a time, t1, where t1 is 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 T2 for a time, t2, where t2 is from 0 to 20 hours, to obtain an activated catalyst.
Type:
Application
Filed:
May 5, 2008
Publication date:
June 17, 2010
Applicant:
SASOL TECHNOLOGY (PROPRIETARY) LIMITED
Inventors:
Jacobus Lucus Visagie, Jan Mattheus Botha, Johannes Gerhardus Koortzen, Michael Steven Datt, Alta Bohmer, Jan Van De Loosdrecht, Abdool Muthalib Saib
Publication number: 20100144520
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 t1 is 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 T2 for a time, t2, where t2 is from 0 to 20 hours, to obtain an activated catalyst.
Type:
Application
Filed:
May 5, 2008
Publication date:
June 10, 2010
Applicant:
SASOL TECHNOLOGY (PROPRIETARY) LIMITED
Inventors:
Jacobus Lucus Visagie, Jan Mattheus Botha, Johannes Gerhardus Koortzen, Michael Steven Datt, Alta Bohmer, Jan Van De Loosdrecht, Abdool Muthalib Saib