Patents by Inventor Alta Bohmer

Alta Bohmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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