| Patent Number |
Title Of Patent |
Date Issued |
| 5330557 |
Fluid bed reduction to produce flowable molybdenum metal |
July 19, 1994 |
| Flowable molybdenum metal powder of controlled particle size distribution is produced by stage-wise reduction wherein, in a first stage, molybdenum trioxide feed is preferably introduced at depth in a fluid bed of molybdenum dioxide and is reduced in an atmosphere containing at least 50% |
| 5314658 |
Conditioning metal powder for injection molding |
May 24, 1994 |
| Tungsten and molybdenum powders are advantageously conditioned for metal injection molding by fluid energy milling the powder prior to batching. A preferred method of conditioning, jet milling, has been found to beneficially effect the particle characteristics to render the metal pow |
| 5313815 |
Apparatus and method for producing shaped metal parts using continuous heating |
May 24, 1994 |
| Shaped metal parts are produced on a continuous basis from a semi-solid metal perform. A plurality of free-standing metal slugs are sequentially heated within an arcuate path defined by a pair of concentrically-positioned solenoid coils to a semi-solid state, such that they may be sh |
| 5171547 |
Recovery of chromium in high purity state from waste materials of etching operations |
December 15, 1992 |
| The present invention is directed to a method for treating a sludge containing substantial amounts of chromium, aluminum, calcium, iron, and phosphorous. The method comprises forming a slurry of the sludge; reacting the slurry with an acid to dissolve substantially all the aluminum and |
| 5000916 |
Molybdate-gluconate corrosion inhibitor |
March 19, 1991 |
| Directed to a new molybdenum carboxylic compound and the use thereof as a corrosion inhibitor of steel and other metals particularly in cooling water. |
| 4992237 |
Ignition of sustained high temperature synthesis reactions |
February 12, 1991 |
| A process is provided for igniting a mixed powder material compact containing sufficient fuel to support an exothermic reaction between ingredients contained in the compact. The ignition is achieved in an inert atmosphere with an electric arc produced by an electrode without contacti |
| 4963336 |
Purification of APT |
October 16, 1990 |
| Directed to a process for producing a tungsten product of enhanced purity from ammonium paratungstate (APT) with a minimum number of processing steps which comprises mixing the APT with an ammonium solution, autoclaving the mixture at a temperature above the boiling point thereof to |
| 4957823 |
Composite sheet made of molybdenum and dispersion-strengthened copper |
September 18, 1990 |
| Directed to the production of composite copper-molybdenum sheet by assembling at least one plate of molybdenum with at least one plate of dispersion-strengthened copper to form a composite billet, heating the billet in a protective atmosphere to a temperature within the hot working r |
| 4957821 |
Composite aluminum molybdenum sheet |
September 18, 1990 |
| Aluminum-molybdenum composite sheet is produced by assembling aluminum and molybdenum sheets to form a billet, rolling the assembled billet in a protective atmosphere at a temperature of about 100.degree. to 400.degree. C. to affect a reduction in thickness of at least about 40% to provi |
| 4954168 |
Reclaiming of aluminum-chromium waste materials from etching operations |
September 4, 1990 |
| A method is provided for treating sludge containing substantial amounts of chromium, aluminum and iron and residuals of other elements. The method comprises forming a slurry of the sludge in water at a temperature ranging from ambient to 150.degree. F. with the specific gravity of the sl |
| 4950554 |
Composite copper-molybdenum sheet |
August 21, 1990 |
| Directed to the production of composite copper-molybdenum sheet by assembling at least one plate of molybdenum with at least one plate of copper to form a composite billet, heating the billet in a protective atmosphere to a temperature within the hot working range for copper, working |
| 4926021 |
Reactive gas sample introduction system for an inductively coupled plasma mass spectrometer |
May 15, 1990 |
| A torch device is provided for use in preparing a sample of a gas or vapor for analysis by an analyzer. The torch device is comprised of an elongated cylindrical body with an inductively coupled plasma generating device located at its output or forward section. The torch includes a first |
| 4917726 |
Chromium recovery process |
April 17, 1990 |
| Waste materials containing chromium, such as the sludge resulting from neutralization of chromic acid bleed streams from metal cleaning and plating operations, are (1) rendered innocuous for land fill purposes by heating to temperatures of at least about 700.degree. C. to stabilize the |
| 4900522 |
Separation of nickel and cobalt from sulfate solutions by solvent extraction |
February 13, 1990 |
| Sulfate solutions containing nickel and cobalt ions are treated by solvent extraction to provide a nickel raffinate with a high Ni:Co ratio and a cobalt raffinate with a high Co:Ni ratio and with low recycle of cobalt by treating the solution with a cobalt extractant to provide a nickel |
| 4846898 |
Method of rendering aluminum base metal resistant to water staining |
July 11, 1989 |
| A method of rendering an aluminum base metal surface resistant to water staining is provided which comprises providing an aluminum base metal surface and applying a stain resistant coating to the aluminum base metal surface, with the stain resistant coating containing a water soluble |
| 4832757 |
Method for producing normalized grade D sucker rods |
May 23, 1989 |
| An article of manufacture is provided in the form of a sucker rod for use in sucker rod pumps. The sucker rod is formed of a medium carbon manganese-molybdenum steel consisting essentially of about 0.25% to 0.45% carbon, about 1.2% to 1.8% manganese, about 0.20% to 0.55% molybdenum, up |
| 4810303 |
Production of hexagonal cadmium sulfide pigment |
March 7, 1989 |
| Hexagonal cadmium sulfide, a bright yellow pigment useful in high temperature processing, is produced by reacting cadmium sulfate solution with a solution of a soluble sulfide under pressure and at a temperature of about 250.degree. C. |
| 4806385 |
Method of producing oxidation resistant coatings for molybdenum |
February 21, 1989 |
| A molybdenum article is disclosed in which the substrate thereof has adherently bonded thereto a thermally self-healing plasma-sprayed coating consisting essentially of a composite of molybdenum and a refractory oxide material capable of reacting with molybdenum oxide under oxidizing |
| 4797510 |
Device for joining superconducting wire |
January 10, 1989 |
| A method and product for coupling the ends of a pair of superconducting cored wires are provided, the core of the wires consisting essentially of a substantially unitary structure of a sintered powered superconducting compound material confined within a tubular element of a metal having |
| 4775106 |
Use of smelter-grade sulfuric acid as true heavy-liquid media in coal cleaning |
October 4, 1988 |
| A method is provided for removing contaminating minerals from coal by true heavy-liquid media. The coal is comminuted to liberate a substantial portion of the minerals from the coal, the method comprising forming a slurry of the comminuted coal in a solution of smelter-grade sulfuric aci |
| 4762700 |
Ammonium octamolybdate-alpha |
August 9, 1988 |
| Ammonium octamolybdate-alpha is formed by reacting powdered molybdenum trioxide with a solution of ammonium dimolybdate in water at the boiling temperature until thickening of the slurry occurs, after which the slurry is digested, filtered hot and the separated precipitate is dried. |
| 4762699 |
Synthesis of molybdenum hexacarbonyl |
August 9, 1988 |
| Molybdenum hexacarbonyl is prepared by carbonylating diammonium oxopentachloromolybdate (V) (NH.sub.4).sub.2 (MoOCl.sub.5) at pressures up to about 2000 psig and temperatures up to about 150.degree. C. in a solvent such as tetrahydrofuran, using a metallic reductant such as magnesium |
| 4761177 |
Production of cobalt and nickel powder |
August 2, 1988 |
| Fine cobalt or nickel powder is produced by hydrogen reduction of a sulfate solution in the presence of a base and a strong reductant such as a metal borohydride wherein the base is added stagewise to the solution with the initial addition of base being sufficient to insure an essentiall |
| 4758406 |
Molybdenum addition agent and process for its production |
July 19, 1988 |
| Molybdenite is roasted under controlled conditions to provide a polymolybdenum oxide composition having an oxygen content in excess of the stoichiometric oxygen content for MoO.sub.2 and less than that for MoO.sub.3, such that the composition contains MoO.sub.3 equivalent in excess o |
| 4758271 |
Continuous copper drossing of lead |
July 19, 1988 |
| A process for the continuous copper drossing of molten lead bullion is provided, the process comprising, establishing a column of molten lead having a hot top portion at a temperature of about 800.degree. C. to 1150.degree. C. and a bottom portion of substantially lower temperature of |
| 4758266 |
Production of high surface area nickel powder |
July 19, 1988 |
| Nickel powder of high surface area is produced by pressurized hydrogen reduction of an ammoniacal aqueous nickel sulfate solution using a small amount of a catalytic reductant compound exemplified by formaldehyde sulfoxalate (rongalite). |
| 4753690 |
Method for producing composite material having an aluminum alloy matrix with a silicon carbide r |
June 28, 1988 |
| Reinforced composite aluminum-matrix articles containing up to 20%, by volume, silicon carbide fibers or particles, are produced by a casting process wherein about 4% to about 7%, by weight, of magnesium is included in the aluminum matrix alloy to facilitate wetting of the reinforcing |
| 4745033 |
Oxidation resistant coatings for molybdenum |
May 17, 1988 |
| A molybdenum article is disclosed in which the substrate thereof has adherently bonded thereto a thermally self-healing plasma-sprayed coating consisting essentially of a composite of molybdenum and a refractory oxide material capable of reacting with molybdenum oxide under oxidizing |
| 4732888 |
Durable zinc ferrite sorbent pellets for hot coal gas desulfurization |
March 22, 1988 |
| Durable, porous sulfur sorbents useful in removing hydrogen sulfide from hot coal gas are prepared by water pelletizing a mixture of fine zinc oxide and fine iron oxide with inorganic and organic binders and small amounts of activators such as sodium carbonate and molybdenite; the pe |
| 4731114 |
Recovery of precious metals from refractory low-grade ores |
March 15, 1988 |
| Low-grade refractory gold ores, which may also contain silver and other metal values are treated by partial roasting of concentrate to remove controlled amounts of sulfur and carbon, then oxygen pressure leached to oxidize further amounts of sulfur and carbon and to dissolve base metals |
| 4713111 |
Production of aluminum-SiC composite using sodium tetrasborate as an addition agent |
December 15, 1987 |
| Reinforced composite aluminum-matrix articles containing silicon carbide fibers or particles, are produced by a casting process wherein the silicon carbide fibers or particles are mixed with dehydrated sodium tetraborate and mixed with molten aluminum or aluminum alloy whereby wetting of |
| 4713086 |
Oil-compatible coal/water mixtures |
December 15, 1987 |
| A method is provided for inhibiting an increase in viscosity of coal/water slurries when such slurries are caused to contact petroleum oil during fuel changeover in power generation systems, the method comprising maintaining in the coal/water slurry during transitional contact with p |
| 4698163 |
Treatment of phosphate-containing wastewater |
October 6, 1987 |
| A method is provided for treating contaminated wastewater of pH ranging from about 1.5 to 3 containing phosphate ions and fluoride ions. The method comprises treating the said wastewater with an amount of alkaline agent selected from the group consisting of limestone (CaCO.sub.3) and |
| 4689156 |
Removal of ammonia from wastewater |
August 25, 1987 |
| A method is provided for removing ammonia from wastewater containing in excess of about 15 ppm NH.sub.3 (N)-T. The method comprises treating the wastewater with an alkaline reagent selected from the group consisting of lime and caustic sufficient to raise the pH to provide a free ammonia |
| 4670229 |
Cyclic process for recovering metal values and alumina from spent catalysts |
June 2, 1987 |
| Metal values and alumina are recovered from spent, usually oily, catalysts by oxygen pressure leaching with sodium hydroxide and/or sodium aluminate to dissolve molybdenum, vanadium and/or tungsten and provide a solid, filterable residue containing alumina and cobalt and/or nickel, the |
| 4666685 |
Selective extraction of molybdenum and vanadium from spent catalysts by oxidative leaching with |
May 19, 1987 |
| Spent hydrodesulfurization catalysts containing alumina, at least one metal from the group consisting of molybdenum, tungsten and vanadium and at least one metal from the group consisting of nickel and cobalt, sulfur, and, usually, residual oil are oxygen pressure leached at a temperatur |
| 4666474 |
Electrostatic precipitators |
May 19, 1987 |
| An electrostatic precipitator is provided comprising a plurality of spaced apart vertically extending collector plates with an array of vertically extending ionizer wire rods disposed in a space between each of the collector plates. The improvement resides in an ionizer wire rod cons |
| 4662429 |
Composite material having matrix of aluminum or aluminum alloy with dispersed fibrous or particu |
May 5, 1987 |
| Reinforced composite aluminum-matrix articles containing a non-oxide reinforcing material, such as silicon carbide fibers or particles, are produced by a casting process wherein a small amount of lithium less than about 1%, by weight, is included in a melt of aluminum matrix alloy to |
| 4659376 |
Fluid bed reduction to produce molybdenum metal |
April 21, 1987 |
| Molybdenum trioxide in granular or powder form is reduced to molybdenum metal by stagewise fluid bed reduction wherein molybdenum trioxide is reduced to molybdenum dioxide using ammonia as the fluidizing-reducing gas at 400.degree. C. to 650.degree. C. and molybdenum dioxide is reduced t |
| 4657735 |
Mo-Hf-C alloy composition |
April 14, 1987 |
| A molybdenum-hafnium-carbon alloy is provided consisting essentially by weight of about 0.6% to about 1% Hf, about 0.045% to about 0.08% C, and the balance essentially molybdenum, the alloy being characterized such that during casting of an ingot and hot forging of a billet thereof, it |
| 4657680 |
Wastewater treatment |
April 14, 1987 |
| A method is provided for the treatment of wastewater of pH ranging from about 1.5 to 3 containing at least about 100 ppm phosphorus as phosphate ions, at least about 50 ppm fluorine as fluoride ions and ammonia in excess of about 15 ppm NH.sub.3 (N)--T, the method comprising removing the |
| 4657065 |
Composite materials having a matrix of magnesium or magnesium alloy reinforced with discontinuou |
April 14, 1987 |
| Reinforced composite magnesium-matrix articles, containing silicon carbide fibers or particles, are produced by a casting process wherein a small amount of lithium, less than about 0.7% by weight, is included in a melt of magnesium matrix alloy to facilitate wetting of the reinforcing |
| 4627900 |
Electrochemical dissolution and control of nickel sulfide scale |
December 9, 1986 |
| A method for electrochemically minimizing sulfide scale buildup on a metal surface by connecting the surface as an anode and periodically reversing the current flow at predetermined intervals. |
| 4614543 |
Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materials |
September 30, 1986 |
| A process is disclosed for the hydrometallurgical treatment of finely divided iron-containing steel plant dusts containing zinc, lead and such other metal values as calcium, manganese, silicon, magnesium, aluminum, cadmium, copper, and the like. The process is carried out by forming an |
| 4610722 |
Process for metal recovery from steel plant dust |
September 9, 1986 |
| A process is provided for hydrometallurgical processing of steel plant dusts containing cadmium, lead, zinc, and iron values, along with impurities such as chloride and fluoride salts of sodium, potassium, magnesium, etc. The first step in the process involves leaching the dust in a |
| 4610721 |
Two-stage leaching process for steel plant dusts |
September 9, 1986 |
| A process is provided for selectively recovering zinc from steel plant dust containing substantial amounts of iron. The process comprises atmospherically leaching the steel plant dust in a first stage wherein an amount of steel plant dust is mixed with an amount of acidic zinc sulfate |
| 4608099 |
General purpose maintenance-free constructional steel of superior processability |
August 26, 1986 |
| This invention relates to an improved corrosion resistant steel which nominally contains: 0.015-0.031% C, 11-12% Cr, 0.2-0.5% Mo, 1.5% max Ni, 1.5% max Mn, 0.8% max Si, 0.05% max Ti, 0.03% max N, 0.03% max P, 0.03% max S with the balance Fe. The steel of the present invention has good |
| 4606817 |
Recovery of molybdenite |
August 19, 1986 |
| Directed to a flotation process for recovering molybdenite from a ground ore pulp containing the same which includes a rougher flotation step in which no collector is used by relatively high recovery of molybdenite in a rougher concentrate uncontaminated with collectors, which rougher |
| 4605435 |
Recycling of steel plant dusts to steel furnaces |
August 12, 1986 |
| A method is provided for converting iron-containing steel plant dust to recyclable agglomerates. The method comprises mixing the dust with sufficient water and about 1 percent by weight Portland cement to permit pelletization. The pellets are dried at temperatures under 100.degree. C. |
| 4600435 |
Solvent extraction of cobalt (II) from sulfate solutions with cobalt extractants |
July 15, 1986 |
| Nickel and cobalt contained in aqueous sulfate solution are separately recovered by counter-current solvent extraction using a cobalt-selective organic extractant while scaling of equipment and cobalt recycle are minimized by controlling aqueous pH at the extraction, scrubbing and st |
