| Patent Number |
Title Of Patent |
Date Issued |
| RE30005 |
Method for the electrolytic recovery of metal employing improved electrolyte convection |
May 22, 1979 |
| An electrodeposition method in which high quality metal such as copper is produced on a non-retentive cathode blank at a high current density. A predetermined close cathode-anode spacing and a gas bubble tube for continuously agitating the electrolyte across the face of the cathode e |
| 4360234 |
In-situ method and apparatus for sparging gas bubbles |
November 23, 1982 |
| Method and apparatus for introducing finely divided gas bubbles into a lixiviant used for in-situ mining of minerals containing metal values, such as copper values. The lixiviant is supplied to a plurality of porous tubes formed of sintered powdered metal while a gas is supplied under |
| 4283947 |
Self cleaning, steam cooled, gas sample probe |
August 18, 1981 |
| A gas sampling probe for industrial furnaces, such as reverberatory furnaces used in extractive metallurgy, is constructed with a sample tube concentrically disposed within a shield tube and spaced therefrom to provide an annular passage for a coolant fluid, such as steam or water va |
| 4274866 |
Flotation and sintering of synthetic manganese carbonate |
June 23, 1981 |
| A process in which manganese is recovered from manganese nodules after the nodules have been treated to recover base metals such as copper, nickel, cobalt, and molybdenum. The process includes the steps of reacting the manganese in the nodules to yield a carbonate and subjecting the mang |
| 4266987 |
Process for providing acid-resistant oxide layers on alloys |
May 12, 1981 |
| Disclosed is a technique for providing a protective oxide layer on an alloy. The technique involves the preliminary cleaning of the alloy's surfaces to remove as much unwanted oxide as possible and the subsequent exposure of the alloy surface to an environment which produces an acid |
| 4253917 |
Method for the production of copper-boron carbide composite |
March 3, 1981 |
| A process for manufacturing nuclear radiation shields consisting of neutron-absorbing boron carbide particles embedded in a heat-dissipating copper matrix. Copper is electroplated through a layer of loose, electrically nonconductive boron carbide particles on a metal substrate. The c |
| 4249998 |
Apparatus and process for producing copper-boron carbide composite by electrolytic entrapment |
February 10, 1981 |
| A vertical electrolytic cell for producing a composite layer of boron carbide-filled copper by codeposition of copper and boron carbide particles. A metal substrate serving as a cathode is positioned below a copper anode in an electrolyte containing copper ions. Boron carbide particl |
| 4248837 |
Solvent extraction of copper, nickel with methyl hexyl dioxime |
February 3, 1981 |
| Dioxime extractants having the following general formula: ##STR1## where R and R' may be any of a variety of organic hydrocarbon radicals such as aliphatic, alkyl and aryl radicals. R and R' may also be hydrogen. Preferably R is an unsaturated hydrocarbon or branch chain alkyl group |
| 4238299 |
Tubing with copper-boron carbide composite facing and methods for its production |
December 9, 1980 |
| Metal tubing, preferably of square cross section, is employed as a cathode in an electrolytic cell. A layer of electrically nonconductive boron carbide particles is deposited on the surface of the tubing facing the anode and copper is electroplated through the layer of particles, fol |
| 4232727 |
Method and apparatus for the continuous production of strip |
November 11, 1980 |
| Disclosed is apparatus and method for integrated, continuous, high speed manufacture of metallic strip, especially brass, from a melt. The apparatus comprises a chilled casting mold in liquid communication with a melt and means for drawing a rod through the mold in a pattern of forward |
| 4227928 |
Copper-boron carbide composite particle and method for its production |
October 14, 1980 |
| A process for manufacturing radiation shield structures of the type consisting of neutron absorbing boron carbide particles embedded in a copper matrix. The material comprises a multiplicity of particles comprising a core of boron carbide, a film of electroless copper bonded to the c |
| 4226685 |
Electrolytic treatment of plating wastes |
October 7, 1980 |
| The known method of removing heavy metal and cyanide ions from plating waste solutions wherein the solution is passed through flow-through, high surface area electrodes to precipitate heavy metal ions and to oxidize cyanide is improved through the use of a novel stationary bed dual e |
| 4222832 |
Cascading electrolyte bleed streams |
September 16, 1980 |
| A system of multiple extraction in which each of the metal elements extracted is bonded to the extractant with a different degree of intensity. To reduce impurities in each metal recovery stage, a bleed stream from each recovery stage is cascaded backwards. In general, the backward c |
| 4218907 |
Rolling mill bearing assembly |
August 26, 1980 |
| Bearing assemblies for supporting cylindrical, metal-rolling rolls. The bearings are housed in chock blocks and comprise both radial and thrust bearings. The radial bearings are hemi-cylindrical in shape and extend around approximately one half of the circumference of each roll and make |
| 4211753 |
Recovery of molybdenum values from dilute solutions |
July 8, 1980 |
| Molybdenum is recovered from dilute, ammoniacal, molybdenum containing solutions by adding ferrous ions to the solution to precipitate an iron hydroxide-ammonium molybdate complex. The precipitate is separated from the aqueous raffinate and is treated with acid to resolubilize the mo |
| 4211270 |
Method for continuous casting of metallic strands at exceptionally high speeds |
July 8, 1980 |
| A cooled mold assembly for the continuous, high-speed casting of metallic strands, especially upcasting strands of copper alloys such as brass, has a hollow die in fluid communication with a melt typically held in a casting furnace. A coolerbody surrounds the die in a tight-fitting r |
| 4207153 |
Electrorefining cell with bipolar electrode and electrorefining method |
June 10, 1980 |
| An electrorefining cell includes a bipolar electrode that is comprised of a sheet of acid resistant metal and a basket of the same or similar material attached directly to one side of the sheet, the basket being lined with an acid-resistant filter cloth. A method for electrorefining copp |
| 4204883 |
Tarnish resistant copper alloy |
May 27, 1980 |
| A copper base alloy of superior tarnish resistance consisting essentially of 7.0 to 8.5% aluminum by weight and 1.5 to 2.5% nickel by weight with the balance (89-91.5 wt %) being essentially copper.The process by which the alloy is prepared is controlled so that the alloy is primarily si |
| 4197233 |
Anti-fouling and anti-sliming coating material |
April 8, 1980 |
| A polymeric composition containing copper flake in sufficient quantities to render the entire thickness of the polymeric composition electrically conductive. The copper flake is treated to remove oxides and reacted with conventional epoxy resins modified with an epoxidized polyol (polygl |
| 4197181 |
Stationary particulate bed dual electrode |
April 8, 1980 |
| Disclosed is an easily assembled and disassembled stationary particulate bed dual electrode for recovering metal values from electrolytic solutions. The electrode comprises two assemblies adapted for mating with one another. Each assembly has a perforated flow distributing plate and a |
| 4197117 |
Recovery of copper by ferrous ion precipitation |
April 8, 1980 |
| Copper is recovered from dilute, ammoniacal, copper containing solutions by adding ferrous ions to the solution to precipitate metallic copper and iron oxides. The mixed precipitate is separated from the aqueous raffinate. The precipitated copper and iron oxides are separated from each |
| 4189461 |
Metal leaching from concentrates using nitrogen dioxide in acids |
February 19, 1980 |
| Sulfidic minerals containing metal values such as copper, silver, nickel, cobalt, molybdenum, zinc, iron, or mixtures thereof are leached in two stages. In the second stage, preleached minerals are oxidized with nitrogen dioxide to enable the metal values to be solubilized in the aqu |
| 4172375 |
Coiling system for metallic strands |
October 30, 1979 |
| Apparatus for guiding and coiling one or more metallic strands that are continuously advancing along their length from a casting apparatus. A coiling apparatus has an open-top coil-collecting basket with concentric, generally cylindrical inner and outer walls. A rotating cone is disposed |
| 4152142 |
Recovery of copper values from iron-containing ore materials as mined and smelted |
May 1, 1979 |
| A process for improving overall recovery of copper from an integrated mining and metallurgical processing operation by utilizing iron-containing copper ore materials as mined, such as low-grade copper ores and mine wastes, and crushed or granulated copper-containing slag obtained by |
| 4149945 |
Hydrometallurgical brass dust reclamation |
April 17, 1979 |
| A process for winning copper and zinc from brass mill waste products containing oxidic copper and zinc, iron, nickel, or cobalt. The feed material is leached in sulfuric acid, neutralized to a pH between about 2.5 and 3.0, and treated with zinc metal to precipitate copper. After sepa |
| 4149880 |
Recovery of copper from arsenic containing metallurgical waste materials |
April 17, 1979 |
| Highly toxic metallurgical waste materials from copper smelting and/or refining operations are processed on a cyclic basis for recovering copper values therefrom while protecting the environment from contamination. The waste materials, usually smelter flue dust and/or refinery sludge |
| 4148816 |
Alkali metal mercaptide solvent extraction of cobalt, nickel |
April 10, 1979 |
| A novel class of extractants and a method of using the extractants in the hydrometallurgical recovery of nickel and cobalt metal. The extractants comprise a water immiscible organic solvent system containing solubilized mercaptide anions. In an important embodiment of the invention, the |
| 4148815 |
Amino-thiol nickel and cobalt solvent extraction |
April 10, 1979 |
| A novel class of extractants and a method of using the extractants in the hydrometallurgical recovery of nickel and cobalt metal. The extractants comprise a water immiscible organic solvent system containing solubilized mercaptide anion. In an important embodiment of the invention, the |
| 4148813 |
Nickel and cobalt solvent extraction with mercaptides |
April 10, 1979 |
| A novel class of extractants and a method of using the extractants in the hydrometallurgical recovery of nickel and cobalt metal. The extractants comprise a water immiscible organic solvent system containing solubilized mercaptide anions. In an important embodiment of the invention, the |
| 4148615 |
Prevention of scale formation in wet lime scrubbers |
April 10, 1979 |
| Proper cooling of fossil fuel power plant or smelter reverberatory furnace off gases for removal of sulfur dioxide by proper contacting of the same with lime or limestone, including the recycling of the scrubbing liquor. |
| 4144310 |
High slurry density sulfidic mineral leaching using nitrogen dioxide |
March 13, 1979 |
| An energy efficient process is disclosed for the hydrometallurgical oxidation of sulfidic minerals containing copper, silver, nickel, cobalt, molybdenum, or zinc values. A high density slurry, e.g., 67% by weight solids, is prepared from a particulate sulfide mineral and water. Nitrogen |
| 4132758 |
Copper leaching employing nitrogen dioxide as oxidant |
January 2, 1979 |
| Sulfidic minerals containing metal values such as copper, silver, nickel, cobalt, molybdenum, zinc, iron, or mixtures thereof are oxidized with nitrogen dioxide to enable the metal values to be solubilized in an aqueous acidic leach liquor. In practicing the invention, the minerals are |
| 4131453 |
Pyrometallurgical brass production |
December 26, 1978 |
| Waste materials containing significant quantities of zinc oxide are mixed with carbon and a sufficient amount of copper to set the overall Zn/Cu weight ratio to a selected value below 0.66. The mixture is loaded into the top of a shaft furnace having a lower region which is heated. Hot g |
| 4128416 |
Nickel recovery employing carbonyl ferrates |
December 5, 1978 |
| A novel process for recovering nickel metal from aqueous ammoniacal nickel solutions such as leach liquors at or close to ambient temperatures and pressures. The process comprises contacting the nickel solution with carbonyl ferrate ions such as HFe(CO).sub.4.sup.- or Fe(CO).sub.4.sup.-- |
| 4125289 |
Method for in situ minefields |
November 14, 1978 |
| A circulation tubing string is disposed about the lixiviant return tubing string in the production hole of an in situ minefield. The circulation string extends from the surface to a point near a packer which defines the top of the leaching interval. A fluid coupler provides a fluid flow |
| 4116488 |
In-situ mining method and apparatus |
September 26, 1978 |
| An environmentally compatible, industrially safe, and potentially economic means for recovering copper and/or nickel from deep-seated deposits without resorting to extensive underground development. A two-phase ammoniacal leach solution containing oxygen bubbles is forced under high |
| 4113586 |
Method and apparatus for the electrolytic recovery of metal employing electrolyte convection |
September 12, 1978 |
| Apparatus and methods for the recovery of metal values from an electrolyte in an electrodeposition or electrowinning cell are disclosed. A bottom baffle assembly supporting a plurality of bubble tubes and alignment devices is urged upward from the bottom of the electrolytic cell. An |
| 4113475 |
Tarnish resistant copper alloy |
September 12, 1978 |
| A copper base alloy of superior tarnish resistance consisting essentially of 7.0 to 8.5% aluminum by weight and 1.5 to 2.5% nickel by weight with the balance (89-91.5 wt %) being essentially copper.The process by which the alloy is prepared is controlled so that the alloy is primarily si |
| 4110106 |
Selective sulfation process for partitioning ferrous and non-ferrous values in an ore |
August 29, 1978 |
| Process for quantitatively converting non-ferrous metals chosen from the group consisting of copper, nickel, cobalt, vanadium, and manganese in an ore concentrate to soluble sulfates and simultaneously convert the ferrous values in the ore to insoluble oxides. The process comprises roast |
| 4109028 |
Fabrication of cathodes for electrodeposition |
August 22, 1978 |
| Disclosed is a method of preparing a cathode for use in the electrodeposition of metallic structures in a predetermined pattern. A porous planar member is provided with a masked region of its porous surface corresponding to the desired pattern of the metallic filaments. A mating plan |
| 4107262 |
Cuprion process start-up control |
August 15, 1978 |
| A process in which copper, nickel, cobalt and molybdenum are recovered by reducing comminuted raw manganese nodules with an aqueous solution containing cuprous ions. An improvement is disclosed in which copper is oxidized to provide a starting solution of cuprous ions for the process. |
| 4097272 |
Winning nickel and cobalt with mercaptide extractants and carbon monoxide strip |
June 27, 1978 |
| A novel process for extracting, concentrating, and isolating nickel and cobalt from aqueous solution thereof. A cobalt and/or nickel bearing solution is contacted with an extractant comprising a substantially water immiscible organic solvent containing solubilized mercaptide anion to for |
| 4095975 |
Continuous recovery of copper metal from acidic solutions |
June 20, 1978 |
| A process for winning copper from acidic aqueous solutions which employs hydrogen to drive the reaction. The copper bearing liquor is treated with an organic phase comprising a quinolic reductant and a nitrile solubilized in a water immiscible solvent. Components of the two phases react |
| 4083921 |
Purifying molybdenum flotation concentrates |
April 11, 1978 |
| Copper, iron, and lead impurities are removed from molybdenum flotation concentrates by mixing the feed concentrates with a nonvolatile chloride salt, heating the mixture to a temperature of from about 200.degree. to 350.degree. C for a time sufficient to activate the lead impurities in |
| 4083915 |
Cobalt stripping process |
April 11, 1978 |
| After the non-cobalt values are stripped from the co-loaded organic, the cobalt ions on the organic are reduced to the divalent state. The organic loaded with divalent cobalt ions is easily stripped with a dilute acid to render the organic recyclable.In another embodiment of the inventio |
| 4082542 |
Copper precipitate agglomerization process |
April 4, 1978 |
| Impure copper precipitates, obtained by cementation of copper from an aqueous solution, are converted into dense, unfriable, high-grade copper pellets suitable for separate smelting and refining as well as for being fed directly to anode or refining furnaces. Sufficient water is added to |
| 4079998 |
Lixiviant recirculator for in situ mining |
March 21, 1978 |
| A downhole recirculator for injecting two-phase lixiviant from a tubing string into a leaching interval of an in situ mine field injection hole, and for circulating the injected lixiviant within the leaching interval. The recirculator includes a core device which is adapted to be readily |
| 4079510 |
Method of manufacturing flexible electrical conductor |
March 21, 1978 |
| Disclosed is an electrical conductor formed from a plurality of elongate filaments, at least a portion of which have a non-circular cross section, the filaments arranged such that the conductor has a substantially smooth exterior surface and high density of material of the filaments in a |
| 4072262 |
Method of fabricating a solar heating unit |
February 7, 1978 |
| A method of fabricating a solar heating unit having tubular conduits for containing high pressure fluids is disclosed. The method comprises the steps of forming a thin sheet of soft metal, preferably a fully annealed copper sheet, by applying sufficient temperature and pressure to creep |
| 4071737 |
Heating panel |
January 31, 1978 |
| An electrically conductive resinous composition of a copper flake, the surface of which has been cleaned by removing therefrom impurities and/or oxides, a resinous binder, an amount of copper flake in said resinous composition being from 25 to 70 percent, the impurities in said copper |
