Abstract: Semiconductor grade tungsten hexafluoride (WF.sub.6) is produced by reacting tungsten metal with a recirculating flow of gaseous WF.sub.6 containing a small concentration of fluorine in a heated reactor. The high purity WF.sub.6 produced is useful for deposition of tungsten metallization in fabricating VLSI integrated circuitry.

Abstract: Directed to a new molybdenum carboxylic compound and the use thereof as a corrosion inhibitor of steel and other metals particularly in cooling water.

Abstract: 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 dissolve the APT and recrystallizing APT from the solution to yield an APT product of enhanced marketability.

Abstract: 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 provide a bonded billet. The billet can be further reduced by hot and/or cold rolling.

Abstract: 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 range for copper, working the billet in a protective atmosphere to effect a reduction in thickness of at least about 40% to bond said dispersion-strengthened copper and said molybdenum together and thereafter further working the resulting bonded billet.

Abstract: 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 slurry ranging from about 1.05 to 1.25, and adding a mineral acid to the slurry to provide a pH ranging from about 0.1-3 to dissolve selectively the aluminum and the chromium and leave a solids residue containing gangue material comprising an oxidized iron compound, calcium sulfate, calcium fluoride, calcium silicate among other solids. The pH of the solution is controlled at range of about 2 to 3.5 to precipitate undesirable elements, including iron, without substantially adversely affecting the dissolved chromium and aluminum.

Abstract: 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 the billet in a protective atmosphere to effect a reduction in thickness of at least about 40% to bond said copper and said molybdenum together and thereafter further working the resulting bonded billet.

Abstract: 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 tubular element for separately feeding a sample of reactive gas or vapor into a mixing chamber located rearward of said plasma generating means, a second tubular element for separately feeding a nabulizer flow of a plasma gas and including water or solvent vapor or aerosol thereof into the mixing chamber to thereby mix with said sample, and a third tubular element for maintaining a first sheath of plasma gas concentrically about the sample mixture as it enters the plasma generating device for dissociation therein by a plasma flame, including a fourth tubular element for maintaining a second sheath of plasma gas around the first sheath as a coolant prior to introduction of ions formed by dissociation into the analyzer.

Abstract: 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 materials for safe disposal and (2) activated by heating to temperatures of about 400.degree. to 500.degree. and the chromium content in the resulting calcine can be recovered by thermite reduction.

Abstract: 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 raffinate of high Ni:Co ratio and a loaded extractant, acid stripping the loaded extractant to provide a cobalt sulfate solution containing some nickel and a regenerated cobalt extractant, treating the cobalt sulfate solution with a nickel extractant to provide a cobalt raffinate with a high Co:Ni ratio and acid stripping the loaded nickel extractant to regenerate the extractant and to provide a recyclable sulfate solution containing only a small proportion of the original cobalt.

Abstract: 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 to about 0.03% niobium, and the balance essentially iron, the sucker rod being in the normalized condition and being characterized by a yield to tensile ratio in excess of about 0.572, a tensile strength of at least about 115 ksi, and by a microstructure consisting essentially of acicular ferrite, fine pearlite and bainite.

Abstract: 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.

Abstract: 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 conditions to form a substantially thermally stable refractory compound of molybdenum. The plasma-sprayed coating is formed of a plurality of interbonded plasma-sprayed layers of a composite of molybdenum/refractory oxide material produced from a particulate mixture thereof. The coating comprises a first layer of molybdenum plasma-sprayed bonded to the substrate of said molybdenum element and a second layer of plasma-sprayed mixture of particulate molybdenum/refractory oxide consisting essentially of predominantly molybdenum bonded to the first layer.

Abstract: 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 an electrical conductivity of at least about 20% of that for pure copper taken as unity which metal forms a clad around the core material. The method comprises providing a pair of superconducting cored wires with the cladding material removed from an end of each of the wires to be coupled together to expose a finite length of said core material. A coupling device comprised of a tubular segment of the same metal as the cladding material is used to join the wires together, the tubular segment having disposed therein a green pellet of the superconducting material. The pellet is positioned inwardly from both ends of the tubular segment to allow for entry of the exposed end of the superconducting cored wires.

Abstract: 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 acid of specific gravity ranging from about 1.2 to 1.7, the specific gravity of the sulfuric acid solution selected being greater than that for the liberated coal but less than that of the contaminating mineral to be separated, thereby effecting substantial separation between the liberated coal and the contained minerals. The coal is removed from the solution and then washed to remove occluded acid therefrom.

Abstract: 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 and an oxygen scavenger such as aluminum trichloride.

Abstract: 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.

Abstract: 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 essentially neutral pH at the time of reductant addition.

Abstract: 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).

Abstract: 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 of 5% and ranging up to 15% by weight, preferably, from about 10% to 15% by weight. The polymolybdenum oxide composition can be used to introduce molybdenum into baths of molten steel and the like with high recovery of the molybdenum content in the bath and with quiet addition characteristics as compared to the use of MoO.sub.3 per se. Preferably, a Herreshoff type roaster is used and the production rate of the furnace producing the new product is substantially increased, with an exit gas richer in SO.sub.2, as compared to use of the same roaster in roasting molybdenite to form MoO.sub.3 per se.