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| Number | Title | Issue Date |
| 7208023 | Dry dust control materials The present invention discloses methods to reduce dusting in bulk materials, such as coal. The method includes mixing with the bulk material either a fraction of the bulk material having an electrostatic charge opposite that of the remainder of the bulk material or ... | 04/24/2007 |
| 6786941 | Methods of controlling the density and thermal properties of bulk materials Methods of controlling the bulk density, permeability, moisture retention and thermal properties of bulk materials are provided by selectively sizing the bulk material. Preferably, the bulk material is sized into successively smaller particle size fractions, with th... | 09/07/2004 |
| 6422494 | Methods of controlling the density and thermal properties of bulk materials Methods of controlling the bulk density, permeability, moisture retention and thermal properties of bulk materials are provided by selectively sizing the bulk material. Preferably, the bulk material is sized into a bi-modal size distribution to control th... | 07/23/2002 |
| 6231627 | Method to reduce oxidative deterioration of bulk materials A method and composition are disclosed to reduce the oxidative deterioration of bulk materials. Preferred embodiments of bulk materials include solid fuel materials, such as coal, and bulk food products. The method includes sizing a bulk material so that ... | 05/15/2001 |
| 5919277 | Method to reduce oxidative deterioration of bulk materials Disclosed is a method to reduce oxidative deterioration of bulk materials. Preferred embodiments of bulk materials include solid fuel materials, such as coal, and bulk food products. The method includes contacting a bulk material with a heat transfer medi... | 07/06/1999 |
| 5904783 | Method for reducing lead leaching in fixtures A method for treating a brass fixture having a fluid-contacting surface with lead dispersoids exposed thereon to reduce lead leaching into a fluid supply by contacting the brass fixture with a liquid metal solution selected from the group consisting of a ... | 05/18/1999 |
| 5762891 | Process for stabilization of arsenic The present invention is a method to remove arsenic from arsenic-containing materials, such as an ore or concentrate, by roasting the arsenic-containing material to convert arsenic sulfides into arsenic oxides. The arsenic oxides are contained in the roas... | 06/09/1998 |
| 5660735 | Method for removing metals from waste solutions The present invention is a method to remove metals from solutions by precipitating the metals and adding cellulosic fiber to the solution. The precipitates attach to the cellulosic fibers to form products. The products may be removed from the solution by ... | 08/26/1997 |
| 5544859 | Apparatus and method for inhibiting the leaching of lead in water A copper alloy plumbing fixture containing interdispersed lead particles coated noncontinuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper ... | 08/13/1996 |
| 5536416 | Method for removing metals from a solution The present invention is a method to remove metals from solutions by precipitating the metals and adding cellulosic fiber to the solution. The precipitates attach to the cellulosic fibers to form products. The products may be removed from the solution by ... | 07/16/1996 |
| 5399322 | Selective recovery of dissolved metals and preparation of metal salt products Discussed is a process for recovering metals and metal-containing products, such as a nickel sulfate product, from aqueous feed solutions comprising two or more dissolved metals. A selected metal is isolated and in a purified form in an aqueous raffinate ... | 03/21/1995 |
| 5320759 | Selective recovery of heavy metals using xanthates A process for selectively recovering dissolved heavy metals from a solution is disclosed that involves selectively reacting a xanthate with such dissolved heavy metals. Selective reaction of a xanthate with selected dissolved heavy metals is accomplished ... | 06/14/1994 |
| 4556422 | Process for the recovery of lead and silver chlorides A process for selectively leaching lead and silver chlorides from a sulfide ore residue in a rapid time which comprises brine leaching the residue under pressure at a temperature above the normal boiling point of the solution, preferably above 100° C. Mo... | 12/03/1985 |
| 4459103 | Automatic volatile matter content analyzer An analyzer is provided for use in determining the volatile matter content of coal and coke. The analyzer automatically adjusts a position of a crucible containing a coal or coke sample relative to a furnace depending upon the temperature of the crucible.... | 07/10/1984 |
| 4289528 | Process for beneficiating sulfide ores One or more mineral values of sulfide ores are beneficiated by cotreating the sulfide ore with a metal containing compound and a reducing gas under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusio... | 09/15/1981 |
| 4289529 | Process for beneficiating sulfide ores In a process for beneficiating one or more mineral values of sulfide ores by treating the sulfide ore with a metal containing compound under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of th... | 09/15/1981 |
| 4276081 | Process for beneficiating ores In a process for beneficiating one or more mineral values of sulfide ores and/or metal oxide ores selected from the group consisting of bauxite, taconite, apatite, titanium oxides and the metal oxides of Groups IIIB, IVB, VB, VIB, VIIB, VIIIB, IB, IIB and... | 06/30/1981 |
| 4276084 | Hydrometallurgical process for the recovery of lead A hydrometallurgical process is used to recover lead from a lead-bearing ore concentrate. The lead-bearing ore concentrate is leached with a solution of cupric chloride in order to precipitate lead as lead chloride, produce elemental sulfur and substantia... | 06/30/1981 |
| 4257881 | Process for beneficiating oxide ores One or more mineral values of metal oxide ores selected from the group consisting of bauxite, taconite, apatite, titanium oxides and the metal oxides of Groups, IIIB, IVB, VB VIB, VIIB, VIIIB, IB, IIB and IVA are beneficiated by treating the ore with a me... | 03/24/1981 |
| 4257781 | Process for enhancing the fuel value of low BTU gas In the field of chemical fuels, prior art coal gasification produces a fuel value of a mixture of carbon monoxide and hydrogen which has a lower BTU than methane. The present process uses coal resources more economically for industry by converting part of... | 03/24/1981 |
| 4239529 | Process for beneficiating sulfide ores One or more mineral values of sulfide ores are beneficiated by treating the sulfide ore with a metal containing compound under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of the gangue in or... | 12/16/1980 |
| 4229209 | Process for beneficiating gold A process for beneficiating particulate gold from non-magnetic foreign material with which it is mixed which comprises contacting the mixture with an iron carbonyl in order to selectively enhance the magnetic susceptibility of the gold particles so that a... | 10/21/1980 |
| 4205979 | Process for beneficiating oxide ores In a process for beneficiating one or more mineral values of a metal oxide ore selected from the group consisting of bauxite, taconite, chrysocolla, apatite, titanium oxides and the metal oxides of Groups IIIB, IVB, VB, VIB, VIIB, VIIIB, IB, IIB and IVA b... | 06/03/1980 |
| 4182308 | Solar energy collector A solar energy collector which is inexpensive to manufacture and install comprising a heat absorber unit of rubber-like material having channels for the passage therethrough of heat exchange fluid and spaced-apart retainer means on its top for retaining a... | 01/08/1980 |
| 4175924 | Treatment of coal with metal containing compounds Raw coal is improved by reacting it with a metal containing compound selected from the group consisting of organic iron containing compounds which exert sufficient vapor pressure, with iron as a component in the vapor, so as to bring the iron into contact... | 11/27/1979 |
| 4134907 | Process for enhancing the fuel value of low BTU gas A process for increasing the fuel value of a gas mixture of carbon monoxide and hydrogen by converting part of the hydrogen and part of the carbon in the carbon monoxide of the gas mixture to methane, which comprises continuously introducing the gas mixtu... | 01/16/1979 |
| 4120665 | Process for improving coal In a process for improving coal wherein the raw coal is treated with a metal containing compound in order to enhance the magnetic susceptibility of certain impurity components contained in the raw coal permitting their removal by magnetic separation, the ... | 10/17/1978 |
| 4119410 | Process for improving coal In a process for improving coal containing elemental sulfur wherein the coal is treated with a metal containing compound in order to enhance the magnetic susceptibility of various impurities contained within the coal thereby permitting their removal by ma... | 10/10/1978 |
| 4108635 | Solder skimmings recovery process An improvement in the method for recovering marketable values of solder, lead, and a zinc chloride-ammonium chloride solution from solder skimmings which comprises grinding the skimmings, water leaching the skimmings to dissolve the zinc chloride and ammo... | 08/22/1978 |
| 4098584 | Removal of impurities from coal The magnetic susceptibility of various impurities contained within coal is increased by simultaneously cotreating the coal with a metal containing compound and a gas selected from the group consisting of hydrogen and carbon monoxide.... | 07/04/1978 |
| 4053301 | Process for the direct production of steel A process for the direct production of steel from particulate iron oxides or concentrates including two major steps in which in Step (1) the iron oxides are converted to iron carbide and in Step (2) steel is produced directly from the carbide in the basic... | 10/11/1977 |
| 3972795 | Axial flow electrolytic cell There is provided a membrane-free axial flow electrolytic cell in which the anodes and cathodes are perforated and lie transversely of a conduit through which an ion containing and conducting medium is pumped. This device is especially useful in the elect... | 08/03/1976 |
| 3961914 | Process for treating coal to make it resistant to spontaneous combustion Coal particles are made resistant to spontaneous combustion by coating them with silicon dioxide by a vapor deposition process in which the particles in a coating chamber are contacted at a temperature that promotes the deposition on the particles of the ... | 06/08/1976 |
| 3942765 | Static mixing apparatus There is provided an improved static mixing apparatus which comprises in combination a tubular body and a static mixing element preferably coextensive in length with the tubular body and disposed therein in fluid flow intercepting relation. The static mix... | 03/09/1976 |
| 3938966 | Process for improving coal A process for improving coal wherein the raw coal is reacted with substantially undecomposed iron carbonyl which alters the apparent magnetic susceptibility of certain impurity components contained in the raw coal thereby permitting their removal by low i... | 02/17/1976 |
