The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Oct. 25, 2002
Peter Jacobus Van Berge, Sasolburg, ZA;
Jacobus Lucas Visagie, Sasolburg, ZA;
Jan Van DE Loosdrecht, Sasolburg, ZA;
Tjaart Jurgens Van Der Walt, Sasolburg, ZA;
Johan Coenraad Sollie, Gouda, NL;
Sylvia Sollie-breur, Legal Representative, Gouda, NL;
Hans Marcel Veltman, Utrecht, NL;
Peter Jacobus Van Berge, Sasolburg, ZA;
Jacobus Lucas Visagie, Sasolburg, ZA;
Jan Van De Loosdrecht, Sasolburg, ZA;
Tjaart Jurgens Van Der Walt, Sasolburg, ZA;
Johan Coenraad Sollie, Gouda, NL;
Sylvia Sollie-Breur, legal representative, Gouda, NL;
Hans Marcel Veltman, Utrecht, NL;
Sasol Technology (Proprietary) Limited, Johannesburg, KR;
Engelhard De Meern B.V., De Meern, NL;
Abstract
A particulate pre-reduction cobalt supported Fischer-Tropsch synthesis catalyst precursor which comprises a catalyst support impregnated with cobalt, is treated with a pure hydrogen reducing gas, at a first specific feed gas space velocity, SV1, and at a first heating rate, HR1, to obtain a partially reduced precursor. The support contains reducible cobalt oxide in a calcined state and having a formula-unit in which each mole of cobalt atoms is associated with more than 4/3 moles of oxygen atoms and displaying a reducible cobalt oxide specific surface area at least equal to that of CoOspinel. The partially reduced precursor is then treated with a pure hydrogen reducing gas, at a second specific feed gas space velocity, SV2, and at a second heating rate, HR2, to obtain an activated supported Fischer-Tropsch catalyst, with SV2≦SV1 and/or HR2≧HR1; however, when SV2=SV1, HR2≠HR1 and when HR2=HR1, SV2≠SV1.