US1293404A - Process of extracting tungsten and similar ...

US1293404A US22270518A US1293404A US 1293404 A US1293404 A US 1293404A US 22270518 A US22270518 A US 22270518A US 1293404 A US1293404 A US 1293404A Authority US United States Prior art keywords solution ores tungsten acid Prior art date 1918-03-15 Legal status The legal status is an assumption and is not a legal conclusion.

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  • Molybdenum-sulfur compounds in lubrication

    -sulfur complexes may be used in suspension but more commonly dissolved in lubricating oils at concentrations of a few percent. disulfide, MoS 2, the most common natural form of , is extracted from the and then purified for direct use in lubrication. Since disulfide is of geothermal origin, it has ...

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  • Method of selective extraction of metal values - CHEMICAL ...

    As explained in the copend- 2 ing application Serial No. 163,958, the essential features or steps involved in the of the from, say, oxide, are: the dissolution of the in a suitable 3 acid the reduction of the dissolved metal to a low valence state, i. e. to a potentially extractable condition, and ...

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  • Extraction of molybdenum and nickel from Ni-Mo ore by acid ...

     · In this study, a novel process for the of and nickel from Ni-Mo was introduced. In this process, and nickel is leached by hydrochloric acid combined with chlorate oxidation and phosphate complexation. The process was characterized by high of and nickel. 2. Materials and methods 2.1.

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  • CN101050489A - Method for extracting rhenium from eluate ...

    method comprises: 1 adding water to flue dust, leaching out Re in flue dust to obtain Re-containing leaching solution 2 adjusting pH value of Re-containing leaching solution...

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  • Molybdenum -

    is a chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, which is based on Ancient Greek Μόλυβδος molybdos, meaning lead, since ores were confused with lead ores. minerals have been known throughout history, but the element was discovered in the sense of differentiating it as a new entity from the mineral salts of ...

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  • Acidic organophosphorus solvent extraction process for the ...

     · In these conditions, quantitative 99.7% of the initial by the HDEHP30%/TPH 70% solvent is achieved in counter current in a mixer-settler battery. In this way the initial process was largely improved. principally by the increase of the initial acidity of the dissolution liquor of impure calcium molybdate.

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  • Molybdenum species in acid solution - Jenkins - 1963 ...

    Solutions of sodium and ammonium molybdate in nitric and in perchloric acids have been examined. The existence of polymeric species at acidities greater than 0.1 M‐HNO 3 has been established by diffusion experiments. Measurements of the absorption spectra and of the distribution of between monododecyl phosphoric acid and aqueous nitric acid indicate the existence of …

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  • Separation of macro amounts of tungsten and molybdenum by ...

    The minimum of W is 1.1%, the maximum of Mo is 72.8% and the highest separation coefficient βMo/W is 84.4 in single stage . View Show abstract

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  • NIOSHTIC-2 Publications Search - 10008085 - Biogenic ...

    Demand for mineral products, depletion of high-grade deposits, and soaring costs for capital outlay have encouraged developments in hydrometallurgical of metals. The use of bacteria has received much attention as a means for acid production and ferric iron regeneration. Besides thiobacilli, the bacteria commonly associated with leaching operations, another group of microbes with s

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  • Molybdenum processing | Britannica

    and copper-molybdenum porphyries are mined by open-pit or by underground methods. Once has been crushed and ground, metallic minerals are then separated from gangue minerals or and copper from each other by flotation processes, using a …

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  • extraction of metals from its ores at least 20 metals

    Jan 21, 2016018332 OF METALS Metals at the bottom of the reactivity series are least reactive. They are found native in nature. For example Gold. 20. OF IRON 21. OF IRON Iron is extracted from called haematite or Iron III Oxide, Fe2O3 by reduction with coke in a blast furnace. Learn More

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  • Method of extraction of arsenic from water solution

    After removal of the liquid phase the remained sediment is dissolved using the caustic ammonia solution up to the liquid state. The technical result of the invention is the high degree of of , reduction of the duration of from the acidic and the very acidic solutions, reduction of power input.

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  • What is Molybdenum Disulfide MoS2? - Definition from ...

     · disulfide MoS 2 is an metallic compound composed of and sulfur. It occurs naturally as the mineral molybdenite, which is the principal of . This compound is silvery black in appearance and is relatively unreactive with other chemical elements.

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