Patents Assigned to Molten Metal Technology, Inc.
  • Patent number: 6096109
    Abstract: A method for converting a ligated-metal into chemical components of the ligated-metal includes forming an ionized zone that can convert the ligated-metal to a reduced ligated-metal intermediate. The ligated-metal is directed into the ionized zone, whereby the ligated-metal is converted to a reduced ligated-metal intermediate, thereby causing a thermodynamically stable metal-ligand bond of the ligated-metal to be electronically destabilized and inducing subsequent metal-ligand bond rupture. The reduced ligated-metal intermediate is converted by the metal-ligand bond rupture into chemical components of the ligated-metal. Ligated-metals that are suitable for processing by the method of the invention include, for example: uranium hexafluoride (UF.sub.6); sodium chloride (NaCl); and metal halides, such as iron trichloride (FeCl.sub.3). Chemical components that can be recovered from the ligated-metal include, for example, metals and gases derived from the ligand component of the ligated-metals.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: August 1, 2000
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, Robert D. Bach
  • Patent number: 5935528
    Abstract: A multicomponent fluid feed apparatus is disclosed that independently preheats and then mixes two or more fluid streams being introduced into a high temperature chemical reactor to promote more rigorous and complete reactions using assemblies of inert tubular elements and an integral mixing orifice plate. The design allows use of ceramic and speciality alloy materials for high temperature service with particularly corrosive halide feeds such as UF.sub.6 and HF. Radiant heat transfer to the tubular elements from external means gives the necessary system high temperatures without excessive temperatures to cause material failure. Preheating of the gaseous reactants in a separate step prior to mixing and injecting the gaseous reactants into a high temperature chemical reactor was found to provide an improved thermal conversion of UF.sub.6 to uranium oxides.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: August 10, 1999
    Assignee: Molten Metal Technology, Inc.
    Inventors: Michael J. Stephenson, Paul A. Haas, David A. Everitt
  • Patent number: 5875385
    Abstract: The present invention provides a method for varying and controlling the chemical composition and physical properties of the uranium oxide solids produced by the thermal conversion of UF.sub.6. The method allows the production of predominantly UO.sub.2, U.sub.3 O.sub.8, or UO.sub.3 interchangeably from the same reactor simply by controlling the hydrogen and oxygen contents of the feed relative to uranium. The temperature profile of the thermal reactor is established by specifying the preheat of the feed prior to mixing, the feed composition, and the reactor wall temperature to thus vary and control the physical properties of the resulting solids according to the end use of the uranium product.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: February 23, 1999
    Assignee: Molten Metal Technology, Inc.
    Inventors: Michael J. Stephenson, Paul A. Haas, Robert S. Eby
  • Patent number: 5866095
    Abstract: A method and system is disclosed for converting a feed, such as a carbonaceous waste, to dissolved atomic constituents for subsequent oxidation of the dissolved atomic constituents. The feed is injected into a molten bath which, at a sufficient temperature, causes conversion of essentially all of the feed to its atomic constituents, such as atomic carbon. Essentially all of the atomic constituents which are to be oxidized in the molten bath dissolve in the molten bath. An oxidant is injected into the molten bath at a rate sufficient to cause the oxidant to exothermically react with the dissolved atomic constituents to heat at least a portion of the molten bath.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: February 2, 1999
    Assignee: Molten Metal Technology, Inc.
    Inventors: Casey E. McGeever, Christopher J. Nagel
  • Patent number: 5858059
    Abstract: First and second feed streams are injected into a molten bath, thereby creating first and second jets. The first and second jets combine to form a substantially planar, or fan jet, region within the molten bath. The first and second feed streams can include a variety of materials, such as oxidant, reducing agents, or waste materials, such as organic waste. In addition, the feed streams can include distinct reactants that are combined in the fan jet region for reaction with each other or with one or more components of the molten bath.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: January 12, 1999
    Assignee: Molten Metal Technology, Inc.
    Inventors: Shaul Abramovich, Arthur White, Mihkel Mathiesen
  • Patent number: 5776420
    Abstract: A method and a system is disclosed for treating a gaseous discharge stream formed from a waste in a molten metal bath. The waste is directed into a reactor containing a molten metal bath. The molten metal bath has operating conditions which are sufficient to dissociate the waste and form a gaseous discharge stream including a dissociation product. The gaseous discharge stream is cooled in a cooling section and the dissociation product is separated, as a particulate, from a gaseous component of the gaseous discharge stream. The fluid particulate stream is recirculated to the gaseous discharge stream in a reaction section of the apparatus.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: July 7, 1998
    Assignee: Molten Metal Technology, Inc.
    Inventor: Christopher J. Nagel
  • Patent number: 5744117
    Abstract: A method and an apparatus produce a product in at least one phase from an organic component in a feed gas stream. The method includes forming a process zone including a process molten bath and a process gas space disposed over the process molten bath. Molten droplets of said molten bath are then dispersed across the process gas space. The feed gas stream is then directed into the process gas zone, wherein the organic component is exposed to said molten droplets, thereby converting at least a portion of the organic component to a product in at least one phase.The apparatus of the invention comprises a reactor which includes a gas formation section, having a feed inlet, and means for retaining a solid feed component within the gas formation section. The apparatus also includes a process section, disposed in the reactor, having a process gas space, a gas outlet and a process molten bath disposed therein.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: April 28, 1998
    Assignee: Molten Metal Technology, Inc.
    Inventors: Mark A. Wilkinson, Christopher J. Nagel
  • Patent number: 5745861
    Abstract: Mixed radioactive wastes, such as those that include a radioactive component and a dissolved salt component, are treated by directing the waste through at least one ion-exchange medium that binds at least a portion of the radioactive component. A liquid discharge stream from which the radioactive component has been separated, and which includes the dissolved salt component, is directed into a molten bath that causes at least a portion of at least one dissolved salt component of the liquid discharge stream to be reductively vaporized and thereby form at least one vaporized product. A gaseous discharge stream is generated by the molten bath that includes at least one vaporized product. In one specific embodiment, the mixed radioactive waste includes radioactive cesium as the radioactive component and sodium nitrate as the dissolved salt component.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: April 28, 1998
    Assignee: Molten Metal Technology, Inc.
    Inventors: Jimmy T. Bell, James W. Snider
  • Patent number: 5717149
    Abstract: A method and apparatus producing halogenated products from metal halide feeds. In one embodiment, uranium hexafluoride is treated by separating fluorine from the metal of the uranium hexafluoride. Uranium hexafluoride is introduced into a molten metal bath under conditions whereby the uranium hexafluoride in the presence of hydrogen and oxygen can react to form a uranium dioxide and anhydrous hydrogen fluoride. The anhydrous hydrogen fluoride is removed from the molten metal bath as a gas stream and the uranium dioxide is discharged as a ceramic phase.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: February 10, 1998
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, Robert D. Bach, Michael J. Stephenson, James E. Johnston
  • Patent number: 5695732
    Abstract: A method relates to treating a halogenated organic waste to produce halogen gas and carbon oxide gas streams. The method includes directing a halogenated organic waste, having a halogen-to-hydrogen atomic ratio of less than about one, into a molten metal bath. The molten metal bath is inert to the halogen and has a free energy of oxidation greater than that of the formation of carbon monoxide from atomic carbon. The halogenated organic feed is converted into halogen gas and atomic carbon, whereby the halogen gas is released from the molten metal bath. An oxidant is directed into the molten metal bath, whereby the atomic carbon is oxidized to form a carbon oxide gas, which is released from the molten metal bath.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 9, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Kevin A. Sparks, James E. Johnston
  • Patent number: 5690888
    Abstract: An apparatus and method for tapping a reactor containing a molten fluid are disclosed. A conduit extending from the reactor is heated to a temperature which causes fluid extracted from the reactor to remain molten while in the conduit. Molten fluid is removed from the reactor by reducing the pressure in a receiving vessel attached to the conduit. As the pressure is reduced in the receiving vessel, molten fluid flows out of the reactor and into and through the conduit, discharging into the receiving vessel. The flow of molten fluid can be terminated by repressurizing the receiving vessel, thereby directing molten fluid in the conduit back into the reactor.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 25, 1997
    Assignee: Molten Metal Technologies, Inc.
    Inventor: Edgar J. Robert
  • Patent number: 5679132
    Abstract: A method and apparatus are disclosed for injecting vaporizable material, such as a vaporizable waste, into a molten bath. A gas is injected into the molten bath at a rate which is sufficient to cause the gas and the molten bath to form a gaseous dispersion. The gas component of the gaseous dispersion occupies a sufficient fraction of said dispersion to cause a significant portion of the vaporizable material, at a rate at which the vaporizable material is injected into the molten bath, to volatilize, combust or decompose during exposure to said gas component. A vaporizable material, such as a particulate solid or hazardous liquid waste, is injected into the gaseous dispersion at a rate which cases a significant portion of the vaporizable material to volatilize, combust or decompose during exposure of said vaporizable material to the gas component of said gaseous dispersion.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 21, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Rick M. Rauenzahn, Christopher J. Nagel
  • Patent number: 5640709
    Abstract: An apparatus and method for producing a product, such as hydrogen halide gas or sulfuric acid, in a regenerator furnace subsystem from a waste containing a non-gasifiable impurity. The method of the invention includes directing a waste, containing a non-gasifiable impurity into a reaction zone, containing a molten metal bath, in a reactor maintained under conditions sufficient to dissociate the waste and to form a gasified feed component and a non-gasifiable impurity. The gasified feed component is then directed from the reactor to a regenerator furnace subsystem, maintained under conditions sufficient to convert the gasified feed component to the desired product.The apparatus of the invention includes a reactor having a waste inlet and a gaseous effluent, a reaction zone containing a molten-metal bath for dissociating the waste, containing a non-gasifiable impurity, and forming a gasified feed component, and a lance for injecting the waste into the reaction zone.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: June 17, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, William M. Haney, III, Ian C. Yates
  • Patent number: 5640707
    Abstract: A method includes organic homologation employing an organic-containing feed. The organic-containing feed is directed into a molten metal bath. The molten metal bath includes a metal which can cause an organic component of the organic-containing feed to homologate and form a homologated organic compound. Operating conditions are established and maintained in the reactor to cause the organic component to form a homologated organic compound that is discharged from the molten metal bath.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: June 17, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, Robert D. Bach
  • Patent number: 5640706
    Abstract: An apparatus and method for producing a product, such as hydrogen halide gas or sulfuric acid, in a regenerator furnace subsystem from a waste containing a non-gasifiable impurity. The method of the invention includes directing a waste, containing a non-gasifiable impurity into a reaction zone, containing a molten metal bath, in a reactor maintained under conditions sufficient to dissociate the waste and to form a gasified feed component and a non-gasifiable impurity. The gasified feed component is then directed from the reactor to a regenerator furnace subsystem, maintained under conditions sufficient to convert the gasified feed component to the desired product.The apparatus of the invention includes a reactor having a waste inlet and a gaseous effluent, a reaction zone containing a molten-metal bath for dissociating the waste, containing a non-gasifiable impurity, and forming a gasified feed component, and a lance for injecting the waste into the reaction zone.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: June 17, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, William M. Haney, III, Ian C. Yates
  • Patent number: 5629464
    Abstract: The invention relates to a method for producing an unsaturated organic compound from an organic-containing feed. The method includes providing a reactor containing a liquid bath which includes a Bronsted acid that can protonate an organic component of the organic-containing feed. The feed is directed into the liquid bath at a rate which causes the Bronsted acid to protonate the organic component. Conditions are established and maintained in the reactor which cause the protonated organic component to fragment and form a carbenium ion and an unsaturated organic compound, whereby the unsaturated organic compound is discharged from the liquid bath.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: May 13, 1997
    Assignee: Molten Metal Technology, Inc.
    Inventors: Robert D. Bach, Christopher J. Nagel
  • Patent number: 5585532
    Abstract: A method and a system is disclosed for treating a gaseous discharge stream formed from a waste in a molten metal bath. The waste is directed into a reactor containing a molten metal bath. The molten metal bath has operating conditions which are sufficient to dissociate the waste and form a gaseous discharge stream including a dissociation product. The gaseous discharge stream is cooled in a cooling section and the dissociation product is separated, as a particulate, from a gaseous component of the gaseous discharge stream. The fluid particulate stream is recirculated to the gaseous discharge stream in a reaction section of the apparatus.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: December 17, 1996
    Assignee: Molten Metal Technology, Inc.
    Inventor: Christopher J. Nagel
  • Patent number: 5571486
    Abstract: A method and apparatus for top-charging a solid waste into a molten metal bath to form a dissociation product are disclosed. The method includes introducing the waste into the molten metal bath through a refractory tube disposed in a reactor, containing the molten metal bath, through which the refractory tube extends. A gas outlet is disposed above the molten metal bath. The refractory tube has a submergible end which is immersed in the molten metal bath and which defines a lower opening at the terminal end of the refractory tube and an elevated opening, whereby a portion of the molten metal bath enters the refractory tube through the lower opening to allow the molten metal bath to remain within the refractory tube while at least partially dissociating the waste to form the dissociation product in the molten metal bath. An oxidizing agent can be directed into the molten metal bath at a rate sufficient to form an gaseous oxygenated product which is discharged from the reactor.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: November 5, 1996
    Assignee: Molten Metal Technology, Inc.
    Inventors: Edgar J. Robert, F. James Howie, III, Christopher J. Nagel, Thomas P. Griffin
  • Patent number: 5555822
    Abstract: A reactor includes a bulk waste inlet and a gas outlet. A baffle within the reactor has a lower edge which can be immersed by a molten metal bath within the reactor. The baffle partitions are gaseous volume above the molten metal bath into a first region, proximate to the bulk waste inlet, and a second region, proximate to the gas outlet. The gas conduit extends from the first region to a portion of the reactor beneath the second region. Gas is directed from the first region through the gas conduit to a portion of the molten metal bath beneath the second region. The gas pressure is thereby equalized above the molten metal bath in the first and second regions during dissociation of bulk waste directed into the first region.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: September 17, 1996
    Assignee: Molten Metal Technology, Inc.
    Inventors: Eric P. Loewen, Arthur W. White
  • Patent number: 5543558
    Abstract: A method includes producing an unsaturated organic compound from an organic component of an organic-containing feed. A reactor is provided which contains a molten metal bath. The molten metal bath includes a metal, such as a suitable transition metal, which can interact with an organic component of the feed. The feed is directed into the molten metal bath at a rate which causes the metal to interact with the organic component. Operating conditions are established and maintained in the reactor to cause the metal to interact with the organic component. At least one carbon-carbon double bond is formed in the organic component to produce an unsaturated organic compound that is discharged from the molten metal bath.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: August 6, 1996
    Assignee: Molten Metal Technology, Inc.
    Inventors: Christopher J. Nagel, Robert D. Bach