molybdenum rhenium leaching

molybdenum rhenium leaching

  • Silver-catalyzed bioleaching of copper,

    01/10/2015  Molybdenite can be the host for rhenium, and minor amounts of Re are solubilized during the bioleaching process (Askari Zamani et al., 2005). Rhenium is associated with molybdenum as an isomorphic solid solution of ReS 2 in MoS 2 (Rouschias, 1974).

  • Cited by : 19
  • Molybdenum Rhenium Leaching- Jaw crusher ball

    Molybdenum Rhenium Leaching. The possibility of selective leaching process was investigated during molybdenite flue dust leaching to recover its rhenium content the results show that addition of alcohols to water makes the medium less favorable for molybdenum transfer into aqueous ph,Molybdenum rhenium leaching. Get Price . Email [email protected] We will strictly protect the privacy of users ...

  • Co-volatilizing-water leaching process for efficient ...

    01/03/2020  During roasting at 600 °C, rhenium is first oxidized to Re 2 O 7 and volatilized into the flue dust, which is then treated by leaching and solvent extraction or ion exchange. Molybdenum which remains in calcine in the form of MoO 3 is leached with ammonia water, and finally precipitated as pure ammonium molybadate (Gupta, 1992; Xiang, 2002).

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  • Molybdenum Processing - IMOA: International

    Further treatment by acid leaching can be used to dissolve impurities like copper and lead if necessary. Production of molybdenum concentrate. Close-up of flotation cell . Overview of banks of flotation cells (Photos courtesy of Kennecott Utah Copper Corporation, USA) Roasting. Roasting in air at temperatures between 500 and 650°C converts MoS 2 concentrate into roasted molybdenite (MoO 3 ...

  • Molybdenum Rhenium Recovery - bookzone.co.za

    An improvement in the recovery of molybdenum and rhenium values by roasting molybdenite which comprises preheating finely divided molybdenite concentrate and MOLYBDENUM, FERROMOLYBDENUM, AND MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM MOLYBDATE... Rhenium Recovery Scrubber Roasting Leaching Wastewater Gas Wastewater

  • Leaching and separation of tungsten, molybdenum

    The influential factors of leaching of W, Mo and Re, such as amount of HCl, amount of FeCl3, amount of H2O2, temperature, and leaching time were investigated. In the leaching process, FeCl3 could...

  • New solid oxo-rhenium and oxo-molybdenum

    Leaching of rhenium species occurred for all supports and was most pronounced for SiO 2. New solid oxo-molybdenum catalysts were synthesized. At 200 °C, decene yields observed using MoO x /Fe 2 O 3, MoO x /SiO 2, MoO x /Al 2 O 3, MoO x /TiO 2 and MoO x /ZrO 2

  • Separation of rhenium from electric-oxidation

    31/07/2013  The separation of rhenium from molybdenum in aqueous solution has always been a problem in hydrometallurgy. The separation of rhenium from the electro-oxidation leachate of molybdenite and its mechanism were investigated. The results show that pH of the leachate significantly affects adsorption rate compared with other experimental parameters.

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  • Behavior of Extraction, Stripping, and Separation ...

    behavior of extraction, stripping and separation possibilities of rhenium and molybdenum from molybdenite roasting dust leaching solutions using tri-otyl-amine (TOA) as an extractant has been investigated. From the results, 5vol% TOA dissolved in kerosene is found to be selective for extraction of rhenium as compared with molybdenum.

  • Molybdenum beneficiation and smelting technology ...

    The rhenium in the molybdenum concentrate is mainly recovered from the oxidative roasting flue gas leaching liquid or oxygen pressure cooking liquid of the molybdenum concentrate, and then extracted from the solution or ion exchange method to make potassium perrhenate or ammonium perrhenate, And then use the reduction method to make high-purity rhenium powder.

  • Separation of rhenium from electric-oxidation

    The separation of rhenium from molybdenum in aqueous solution has always been a problem in hydrometallurgy. The separation of rhenium from the electro-oxidation leachate of molybdenite and its mechanism were investigated. The results show that pH of the leachate significantly affects adsorption rate compared with other experimental parameters.

  • molybdenum rhenium leaching - jerabyflasz.cz

    At this condition, leaching percentage of rhenium and molybdenum was 86.1% and 88.6%, respectively.

  • Behavior of Extraction, Stripping, and Separation ...

    behavior of extraction, stripping and separation possibilities of rhenium and molybdenum from molybdenite roasting dust leaching solutions using tri-otyl-amine (TOA) as an extractant has been investigated. From the results, 5vol% TOA dissolved in kerosene is found to be selective for extraction of rhenium as compared with molybdenum.

  • leaching molybdenum oxidative - dinykoekoek.nl

    In the method of leaching molybdenum (Mo) from the sulfide mineral containing molybdenum (Mo) and copper (Cu) through the electrolytic oxidation scheme according to the present invention, the leaching yield of the molybdenum (Mo) according to the pH of the

  • JP2016191118A - Method for recovering rhenium

    PROBLEM TO BE SOLVED: To provide a method for recovering rhenium from molybdenum concentrate in which the volatilization ratio of rhenium oxide can be improved in a way having a higher productivity and safety as compared to the conventional method.SOLUTION: Provided is a method for recovering rhenium from molybdenum concentrate including: a pretreatment step for leaching

  • Separation of rhenium and molybdenum from

    Molybdenum resources around the world are mainly associated with porphyry copper ores. Molybdenite (MoS2) is the main Mo mineral that has rhenium in its crystal lattice. This paper investigates the recovery of rhenium and molybdenum from a molybdenite concentrate using a hydrometallurgical treatment method. The molybdenite concentrate is leached with nitric acid and subjected to solvent ...

  • molybdenum leaching in kenya - unityone.nl

    molybdenum leaching in kenya. HFC Refrigerants (55) HST Hydraulic Cone CrusherHST series hydraulic cone crusher is combined with technology such as machinery, hydraulic pressure, electricity, automation, intelligent control, etc. , representing the most advanced crusher technology in the world. It is not only widely applied in . HJ Jaw CrusherJaw Crushers are often used as the primary crusher ...

  • How is Molybdenum Extracted - samaterials

    Electro oxidation leaching method: it is improved by sodium hypochlorite method, the method is adding molybdenite mineral slurry to the electrolytic tank, has been equipped with Sodium Chloride Solution in the electro oxidation process, Cl2 and anode products react with water to produce hypochlorite, molybdenum sulfide hypochlorite oxidation in minerals, to form molybdenum molybdate into ...

  • Method of separating rhenium and molybdenum

    There is a method of extraction of rhenium from acidic aqueous solutions of wet gas cleaning roasting molybdenum concentrates by sorption of rhenium on the base of the Ammonite EN-21-16 at pH 3-0,5 (Mekler LI Nonferrous metals, 1975, No. 10, p.42-47). However, if this is not achieved sufficiently complete to clean the SC from molybdenum ammonium eluates. In addition, the acidity range, which ...

  • MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM

    Pure molybdic oxide can be produced from technical grade molybdic oxide through sublimation and condensation or by leaching. In sublimation, the technical grade oxide is heated to approximately 1,100°C in a muffle type furnace. The oxide is vaporized and carried in a stream of forced air through cooling ducts and 4Ibid., p. 850.

  • Separation of rhenium and molybdenum from

    The molybdenite concentrate is leached with nitric acid and subjected to solvent extraction to recover and separate rhenium and molybdenum from the leached liquor. The effects of pH and the chemicals’ concentration on extraction characteristics of Mo and Re are investigated to define the best condition for selective extraction of these metals.

  • How is Molybdenum Extracted - samaterials

    Electro oxidation leaching method: it is improved by sodium hypochlorite method, the method is adding molybdenite mineral slurry to the electrolytic tank, has been equipped with Sodium Chloride Solution in the electro oxidation process, Cl2 and anode products react with water to produce hypochlorite, molybdenum sulfide hypochlorite oxidation in minerals, to form molybdenum molybdate into solution.

  • WO2011113080A1 - Method of oxidative leaching

    A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidising species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10mol% of the chlorine-based oxidising species; Allowing and/or ...

  • Method of separating rhenium and molybdenum

    There is a method of extraction of rhenium from acidic aqueous solutions of wet gas cleaning roasting molybdenum concentrates by sorption of rhenium on the base of the Ammonite EN-21-16 at pH 3-0,5 (Mekler LI Nonferrous metals, 1975, No. 10, p.42-47). However, if this is not achieved sufficiently complete to clean the SC from molybdenum ammonium eluates. In addition, the acidity range, which ...

  • Method of oxidative leaching of

    16/06/2015  A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or ...

  • Co-volatilizing-water leaching process for efficient ...

    Highlights•Low-grade MoS2 concentrate was purified using a solution of HCl and CaCl2.•Within 30 min, 90.4% of Mo and almost all Re were co-volatilized at 1050 °C.•Volatilized MoO3 condensed as high-purity product (99.9%) at over 500 °C.•98.6% of Re was leached out with water at ambient temperature within 30 min.AbstractRhenium-bearing molybdenite concentrate is a typical mineral resource to

  • Selective recovery of rhenium from molybdenite

    Recovery of molybdenum and rhenium in scrub liquors of fumes and dusts from roasting molybdenite concentrates. Hossein Salehi, H. Tavakoli, H. Samim 2019. 1. Selective recovery of Rhenium from industrial leach solutions by synergistic solvent extraction. Tao Hong, Manbo Liu, G. Stevens 2020. 1. Co-volatilizing-water leaching process for efficient utilization of rhenium-bearing ...

  • How Is Molybdenum Mined and Processed?

    If necessary, acid leaching can be used to further dissolve impurities such as copper and lead. 3. Calcination. MoS2 concentrate is roasted in the air at a temperature of 500-650℃ and converted into molybdenum calcined sand (MoO3) (also known as industrial molybdenum trioxide). The chemical reactions are as follows: 2MoS2 + 7O2 → 2MoO3 + 4SO2 MoS2 + 6MoO3 → 7MoO2 + 2SO2 2MoO2

  • Metals and HydrometallurgyIon Exchange Resin

    Recovery of rhenium and molybdenum from sulfuric acid solution which produces molybdenum and copper: PM604: Separation of rhenium from molybdenum: PM401: Convert sodium tungstate to ammonium tungstate: PM403: Molybdenum extraction resin:

  • Acid Pressure Leach Process for Copper Removal

    of molybdenite and iron (hydro-) oxide can be treated by means of flotation or oxygen pressure leaching in alkaline media to extract molybdenum and rhenium values. KEY WORDS Chalcopyrite, Pyrite, Sulfide Mineral Oxidation, Autoclave Leaching 1.

  • Sustainable Extraction and Separation of Rhenium and ...

    rhenium (VII) oxide, Re 2 O 7, from the sulfurous gas phase generated during hearth roasting (in molybdenum processing) and smelting (in copper processing).7−9 An alternative process relies on the pressure leaching of molybdenite concentrates. Rhenium is solubilized during the pressure leaching

  • Method of separating rhenium and molybdenum

    There is a method of extraction of rhenium from acidic aqueous solutions of wet gas cleaning roasting molybdenum concentrates by sorption of rhenium on the base of the Ammonite EN-21-16 at pH 3-0,5 (Mekler LI Nonferrous metals, 1975, No. 10, p.42-47). However, if this is not achieved sufficiently complete to clean the SC from molybdenum ammonium eluates. In addition, the acidity range, which ...

  • Method of detecting rhenium in molybdenum

    The known method of determination of rhenium in copper, copper-molybdenum and molybdenum ores and concentrates by atomic emission spectrometry with inductively coupled plasma, comprising mixing the original sample with sodium peroxide, melting the mixture at 800°C, the translation of rhenium in solution in the form of perrenate ions by leaching Plava water when heated, separating the solution ...

  • recovery of tungsten and rhenium -

    Rhenium Extraction by Leaching in Ammonium Iodide Iodine. Pure rhenium is a refractory metal with a very high melting point of 3180°C. Extraction of rhenium from molybdenite concentrates and other primary sources has been studied for many years. Hydrometallurgical methods using Br2 HNO3 Ca(OH)2 NaOH or Na2CO3 have been investigated. Recently a new process using halogen salts and

  • Method of oxidative leaching of

    16/06/2015  A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or ...

  • How Is Molybdenum Mined and Processed?

    If necessary, acid leaching can be used to further dissolve impurities such as copper and lead. 3. Calcination. MoS2 concentrate is roasted in the air at a temperature of 500-650℃ and converted into molybdenum calcined sand (MoO3) (also known as industrial molybdenum trioxide). The chemical reactions are as follows: 2MoS2 + 7O2 → 2MoO3 + 4SO2 MoS2 + 6MoO3 → 7MoO2 + 2SO2 2MoO2

  • Review Molybdenum Recovery from Mineral Raw Materials by ...

    from which molybdenum, sulfur, rhenium, copper and other elements can be recovered. Table 1 shows technological processes, which are used or tested in industry for molybdenum production from raw materials. * Corresponding author. E-mail: [email protected] . 83 Table 1 Technological processes of molybdenum production from raw materials Key technological process Method of processing and Mo

  • Rhenium Production - ISTC

    Rhenium content in solutions resulting from underground leaching is not higher than 0.2 – 0.4 mg/L. Though rhenium content in the solutions is low, a potential rhenium production by three mining pisions of “Kazatomprom” National Company could reach 6 tons per year.

  • Ion Exchange Separation of Rhenium from

    Anal. Chem. All Publications/Website. OR SEARCH CITATIONS

  • RHENIUM - PROMETIA

    Rhenium is the rarest element in the Earth’s crust. Rhenium is probably not found free in nature, but occurs in amounts from 0.001% up to 0.2% in the mineral molybdenite, the biggest commercial source. SECONDARY RESOURCES Rhenium is mainly extracted as by-product of copper-molybdenum deposits, with about 80 percent recovered from flue