Patents by Inventor Ahmed Vahed
Ahmed Vahed 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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Patent number: 8961649Abstract: A method for recovering base metal values from oxide ore is provided by the present disclosure. The ore includes a first metal selected from the group consisting at least one of iron and aluminum and a second metal selected from the group consisting of at least one of nickel, cobalt and copper. The method includes the steps of: contacting the oxide ore with hydrogen chloride gas to obtain chlorides of the first and second metals and subjecting at least the first and second metals to pyrohydrolysis at a predetermined temperature to decompose the chlorides of the first metal into oxides. The method also includes the step of mixing the oxides of the first metal and the chlorides of the second metal in an aqueous solution to dissolve the chlorides of the second metal and recovering the dissolved ions of the second metal from the aqueous solution.Type: GrantFiled: August 26, 2008Date of Patent: February 24, 2015Assignee: Vale Canada LimitedInventors: Antonio Clareti Pereira, Flavia Dutra Mendes, Tiago Valentim Berni, Ahmed Vahed
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Patent number: 8574540Abstract: A method for producing prefluxed metal oxide from a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof includes providing a mixture of at least one slag making oxide and a metal salt selected from the group consisting of nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof, blending with a binder, blending in a flux additive to form a slag-making mixture, forming the slag-making mixture into prefluxed agglomerates, and calcining the prefluxed agglomerates to produce a prefluxed metal oxide. An agglomerate is provided which includes a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof, a slag making oxide, and a flux additive.Type: GrantFiled: February 6, 2009Date of Patent: November 5, 2013Assignee: Vale S.A.Inventors: Geoffrey Edwin Osborne, Ahmed Vahed, Samuel Walton Marcuson
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Patent number: 8557019Abstract: A method for producing metal oxide from a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate or mixed nickel-cobalt carbonate includes providing a mixture of the metal salt, mixing the metal salt with a binder selected from an inorganic binder or an organic binder, forming the mixture into agglomerates, and calcining the agglomerates to produce metal oxide. Another method for making metallic nickel or cobalt includes providing the above metal salt, mixing the metal salt with the above binder to form a mixture, optionally adding water, forming the mixture into agglomerates, drying the agglomerates, adding an effective reducing amount of coke and/or coal and directly reducing the dried agglomerates with an effective amount of heat to produce metallic nickel and/or cobalt. Coke particles may be added to the mixture prior to agglomeration.Type: GrantFiled: April 15, 2009Date of Patent: October 15, 2013Assignee: Vale Inco LimitedInventors: Geoffrey Edwin Osborne, Ahmed Vahed, Samuel Walton Marcuson, Wanda Agnieszka Baczkowska, Emmanuel Nii Tackie
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Publication number: 20090249921Abstract: A method for producing metal oxide from a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof includes providing a mixture of the metal salt, mixing the metal salt with a binder selected from the group consisting of inorganic binder, organic binder and combinations thereof, forming the mixture into agglomerates, and calcining the agglomerates to produce metal oxide.Type: ApplicationFiled: April 15, 2009Publication date: October 8, 2009Applicant: VALE INCO LIMITEDInventors: Geoffrey Edwin Osborne, Ahmed Vahed, Samuel Walton Marcuson
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Publication number: 20090241731Abstract: A method for recovering base metal values from oxide ore is provided by the present disclosure. The ore includes a first metal selected from the group consisting at least one of iron and aluminum and a second metal selected from the group consisting of at least one of nickel, cobalt and copper. The method includes the steps of: contacting the oxide ore with hydrogen chloride gas to obtain chlorides of the first and second metals and subjecting at least the first and second metals to pyrohydrolysis at a predetermined temperature to decompose the chlorides of the first metal into oxides. The method also includes the step of mixing the oxides of the first metal and the chlorides of the second metal in an aqueous solution to dissolve the chlorides of the second metal and recovering the dissolved ions of the second metal from the aqueous solution.Type: ApplicationFiled: August 26, 2008Publication date: October 1, 2009Applicant: VALE INCO LIMITEDInventors: Antonio Clareti Pereira, Flavia Dutra Mendes, Tiago Valentim Berni, Ahmed Vahed
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Publication number: 20090208405Abstract: A method for producing prefluxed metal oxide from a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof includes providing a mixture of at least one slag making oxide and a metal salt selected from the group consisting of nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof, blending with a binder, blending in a flux additive to form a slag-making mixture, forming the slag-making mixture into prefluxed agglomerates, and calcining the prefluxed agglomerates to produce a prefluxed metal oxide. An agglomerate is provided which includes a metal salt selected from nickel hydroxide, cobalt hydroxide, mixed nickel-cobalt hydroxide, nickel carbonate, cobalt carbonate, mixed nickel-cobalt carbonate and combinations thereof, a slag making oxide, and a flux additive.Type: ApplicationFiled: February 6, 2009Publication date: August 20, 2009Applicant: VALE INCO LIMITEDInventors: Geoffrey Edwin Osborne, Ahmed Vahed, Samuel Walton Marcuson
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Publication number: 20050193863Abstract: A process for selectively reducing calcine from a copper/nickel containing sulfidic material includes subjecting the calcine to a mildly reducing atmosphere at relative high temperatures. CuO is selectively converted to Cu2O which can easily be separated by leaching from other metals which may be present in the material.Type: ApplicationFiled: March 5, 2004Publication date: September 8, 2005Inventors: Mika Muinonen, Samel Marcuson, Ahmed Vahed, Anthony Warner
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Patent number: 6228143Abstract: A rotary thermal oxidizer removes polymeric and other non-metal components of exhausted batteries and cells leaving value-metals, such as cadmium, nickel, and iron behind for subsequent processing. By preheating the sweep gas to a temperature above the auto-ignition temperature of the polymers, prior to their introduction into the oxidizer, and controlling the oxygen content within the oxidizer the risks of explosion and fire associated with the pyrometallurgical recycling of the cells is substantially reduced.Type: GrantFiled: January 18, 2000Date of Patent: May 8, 2001Assignee: The International Metals Reclamation Company, Inc.Inventors: Victor Henry Aiken, Russell R. Bleakney, Richard H. Hanewald, Ahmed Vahed, Anthony Edward Moline Warner
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Patent number: 5178666Abstract: This invention relates to a thermal upgrading process whereby nickel-containing limonite or limonite/saprolite blends are pelletized with requisite amounts of solid carbon reductant and a sulfure-bearing concentrating agent. The pellets are fed to a reactor where they are gradually heated, causing reduction of the metal values. The reduced pellets are then held in a "metallics growth zone" of the reactor at a temperature high enough to allow for liquid-phase migration of the metallics within the pellets but below the point at which the pellets become sticky. The metallics growth zone is provided with a carefully controlled combustion gas atmosphere equivalent to about 60-65% aeration of partial combustion of natural gas which prevents further reduction or re-oxidation and thus provides a good environment for metallic particle growth. After a sufficient retention time, the pellets are then rapidly cooled to prevent the disproportionation of wustite to magnetite.Type: GrantFiled: December 3, 1991Date of Patent: January 12, 1993Assignee: Inco LimitedInventors: Carlos M. Diaz, Ahmed Vahed, Dingzhu Shi, Christopher D. Doyle, Anthony E. M. Warner, Douglas J. MacVicar