Patents by Inventor George Owusu
George Owusu 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).
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Publication number: 20130276586Abstract: Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution.Type: ApplicationFiled: June 19, 2013Publication date: October 24, 2013Inventors: Brett T. Waterman, Steve Nels Dixon, Theresa Linne Morelli, George Owusu, Stefka Todorova Ormsby
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Patent number: 8506673Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a, process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: GrantFiled: January 30, 2012Date of Patent: August 13, 2013Assignee: Freeport-McMoran CorporationInventors: James D Gillaspie, David R Baughman, Dennis D Gertenbach, Wayne W Hazen, George Owusu, John C Wilmot
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Patent number: 8491700Abstract: Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution. The methods can also incorporate an ion exchange as a rhenium recovery apparatus.Type: GrantFiled: December 21, 2012Date of Patent: July 23, 2013Assignee: Freeport-McMoran CorporationInventors: Brett T. Waterman, Steve Nels Dixon, Theresa Linne Morelli, George Owusu, Stefka Todorova Ormsby
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Patent number: 8361192Abstract: Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution.Type: GrantFiled: August 17, 2012Date of Patent: January 29, 2013Assignee: Freeport-McMoran CorporationInventors: Brett T. Waterman, Steve Nels Dixon, Theresa Linne Morelli, George Owusu, Stefka Todorova Ormsby
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Publication number: 20120304827Abstract: Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution.Type: ApplicationFiled: August 17, 2012Publication date: December 6, 2012Applicant: FREEPORT-MCMORAN CORPORATIONInventors: Brett T. Waterman, Steve Nels Dixon, Theresa Linne Morelli, George Owusu, Stefka Todorova Ormsby
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Publication number: 20120125160Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a, process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: ApplicationFiled: January 30, 2012Publication date: May 24, 2012Applicant: FREEPORT-MCMORAN CORPORATIONInventors: James D Gillaspie, David R. Baughman, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C Wilmot
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Patent number: 8114365Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: GrantFiled: March 5, 2010Date of Patent: February 14, 2012Assignee: Freepoint-McMoran CorporationInventors: James D. Gillaspie, David R. Baughman, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot
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Publication number: 20110000337Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: ApplicationFiled: March 5, 2010Publication date: January 6, 2011Applicant: FREEPORT-MCMORAN CORPORATIONInventors: James D. Gillaspie, David R. Baughman, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot
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Publication number: 20100263490Abstract: Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution.Type: ApplicationFiled: April 16, 2009Publication date: October 21, 2010Applicant: FREEPORT-MCMORAN COPPER & GOLD INC.Inventors: Brett T. Waterman, Steve Nels Dixon, Theresa Linne Morelli, George Owusu, Stefka Todorova Ormsby
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Patent number: 7691347Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: GrantFiled: September 19, 2007Date of Patent: April 6, 2010Assignee: Freeport-McMoran CorporationInventors: James D. Gillaspie, David R. Baughman, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot
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Publication number: 20090074640Abstract: The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes.Type: ApplicationFiled: September 19, 2007Publication date: March 19, 2009Applicant: PHELPS DODGE CORPORATIONInventors: James D. Gillaspie, David R. Baughman, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot