Patents by Inventor Hendrik Van Rensburg
Hendrik Van Rensburg 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: 11278870Abstract: The present invention relates to catalysts, more particularly to a cobalt-containing catalyst composition. The present invention further relates to a process for preparing a cobalt-containing catalyst precursor, a process for preparing a cobalt-containing catalyst, and a hydrocarbon synthesis process wherein such a catalyst is used. According to a first aspect of the invention, there is provided a cobalt-containing catalyst composition comprising cobalt and/or a cobalt compound supported on and/or in a silica (SiO2) catalyst support wherein the average pore diameter of the catalyst support is more than 20 nm but less than 50 nm; the catalyst composition also including a titanium compound on and/or in the catalyst support, and a manganese compound on and/or in the catalyst support.Type: GrantFiled: June 22, 2017Date of Patent: March 22, 2022Assignee: Sasol South Africa LimitedInventors: Jan Mattheus Botha, Denzil James Moodley, Jana Heloise Potgieter, Hendrik Van Rensburg, Jan Van De Loosdrecht, Prabashini Moodley
-
Publication number: 20210213428Abstract: The present invention relates to catalysts, more particularly to a cobalt-containing catalyst composition. The present invention further relates to a process for preparing a cobalt-containing catalyst precursor, a process for preparing a cobalt-containing catalyst, and a hydrocarbon synthesis process wherein such a catalyst is used. According to a first aspect of the invention, there is provided a cobalt-containing catalyst composition comprising cobalt and/or a cobalt compound supported on and/or in a silica (SiO2) catalyst support wherein the average pore diameter of the catalyst support is more than 20 nm but less than 50 nm; the catalyst composition also including a titanium compound on and/or in the catalyst support, and a manganese compound on and/or in the catalyst support.Type: ApplicationFiled: June 22, 2017Publication date: July 15, 2021Inventors: Jan Mattheus BOTHA, Denzil James MOODLEY, Jana Heloise POTGIETER, Hendrik VAN RENSBURG, Jan VAN DE LOOSDRECHT, Prabashini MOODLEY
-
Patent number: 9387463Abstract: A process for preparing a cobalt-containing hydrocarbon synthesis catalyst includes, in a carbide formation step, treating an initial catalyst precursor comprising a catalyst support supporting cobalt and/or a cobalt compound, with a CO containing gas at a temperature T. T is from 200° C. to 280° C. The cobalt or cobalt compound is converted to cobalt carbide thereby obtaining a cobalt carbide containing catalyst precursor. The CO containing gas (when it contains H2) does not have a CO to H2 molar ratio equal to or less than 33:1. The carbide formation step is carried out under non-oxidative conditions. In a subsequent activation step, the cobalt carbide containing catalyst precursor is subjected to treatment with a hydrogen containing gas at a temperature T2. T2 is at least 300° C. The cobalt carbide is converted to cobalt metal thereby activating the cobalt carbide containing catalyst precursor and obtaining a cobalt-containing hydrocarbon synthesis catalyst.Type: GrantFiled: October 7, 2013Date of Patent: July 12, 2016Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventor: Hendrik Van Rensburg
-
Patent number: 9248435Abstract: A process for preparing a cobalt-containing hydrocarbon synthesis catalyst includes calcining an initial catalyst precursor comprising a catalyst support supporting a cobalt compound, by heat treating the initial catalyst precursor under non-reducing conditions in order to decompose the cobalt compound and/or to cause the cobalt compound to react with oxygen, thereby to obtain a calcined initial catalyst precursor. A cobalt compound is introduced onto and/or into the calcined initial catalyst precursor so that the calcined initial catalyst precursor supports this cobalt compound thereby obtaining a subsequent catalyst precursor. The subsequent catalyst precursor is directly subjected to reduction conditions to activate the subsequent catalyst precursor, thereby to obtain a cobalt-containing hydrocarbon synthesis catalyst.Type: GrantFiled: August 31, 2012Date of Patent: February 2, 2016Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventor: Hendrik Van Rensburg
-
Patent number: 9205409Abstract: 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° C. at a heating rate below 10° C./minute, and effecting gas flow at a space velocity of at least 9 m3n/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.Type: GrantFiled: April 25, 2012Date of Patent: December 8, 2015Assignee: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Cornelia Carolina Eloff, Jan Van De Loosdrecht, Jacobus Lucas Visagie, Hendrik Van Rensburg
-
Publication number: 20150273443Abstract: A process for preparing a cobalt-containing hydrocarbon synthesis catalyst includes, in a carbide formation step, treating an initial catalyst precursor comprising a catalyst support supporting cobalt and/or a cobalt compound, with a CO containing gas at a temperature T. T is from 200° C. to 280° C. The cobalt or cobalt compound is converted to cobalt carbide thereby obtaining a cobalt carbide containing catalyst precursor. The CO containing gas (when it contains H2) does not have a CO to H2 molar ratio equal to or less than 33:1. The carbide formation step is carried out under non-oxidative conditions. In a subsequent activation step, the cobalt carbide containing catalyst precursor is subjected to treatment with a hydrogen containing gas at a temperature T2. T2 is at least 300° C. The cobalt carbide is converted to cobalt metal thereby activating the cobalt carbide containing catalyst precursor and obtaining a cobalt-containing hydrocarbon synthesis catalyst.Type: ApplicationFiled: October 7, 2013Publication date: October 1, 2015Inventor: Hendrik Van Rensburg
-
Publication number: 20140155501Abstract: A process for preparing a cobalt-containing hydrocarbon synthesis catalyst includes calcining an initial catalyst precursor comprising a catalyst support supporting a cobalt compound, by heat treating the initial catalyst precursor under non-reducing conditions in order to decompose the cobalt compound and/or to cause the cobalt compound to react with oxygen, thereby to obtain a calcined initial catalyst precursor. A cobalt compound is introduced onto and/or into the calcined initial catalyst precursor so that the calcined initial catalyst precursor supports this cobalt compound thereby obtaining a subsequent catalyst precursor. The subsequent catalyst precursor is directly subjected to reduction conditions to activate the subsequent catalyst precursor, thereby to obtain a cobalt-containing hydrocarbon synthesis catalyst.Type: ApplicationFiled: August 31, 2012Publication date: June 5, 2014Inventor: Hendrik Van Rensburg
-
Publication number: 20140080929Abstract: 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° C. at a heating rate below 10° C./minute, and effecting gas flow at a space velocity of at least 9 m3n/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.Type: ApplicationFiled: April 25, 2012Publication date: March 20, 2014Applicant: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Cornelia Carolina Eloff, Jan Van De Loosdrecht, Jacobus Lucas Visagie, Hendrik Van Rensburg
-
Publication number: 20090012323Abstract: This invention relates to a process for the production of a mixture of detergent-range alcohols having an average of between 8 and 20 carbon atoms per molecule. The process includes the steps of providing a hydrocarbon stream containing olefins and paraffins in which more than 5% by volume of olefin molecules in the hydrocarbon stream have a total number of carbon atoms which is different from the total number of carbon atoms of the most abundant two carbon numbers of olefins in the hydrocarbon stream; reacting the hydrocarbon stream with CO and an alcohol in the presence of a catalyst in a hydroesterification reaction to form a hydrocarbon stream containing esters and paraffins; separating esters from the hydrocarbon stream containing esters and paraffins; and subjecting the esters to a hydrogenation reaction to provide the mixed alcohol product.Type: ApplicationFiled: June 30, 2008Publication date: January 8, 2009Applicant: Sasol Technology (Proprietary) LimitedInventors: Hendrik Van Rensburg, Craig McGregor