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Kinetics of pressure oxidative leaching of molybdenite

01/01/2012 The current study was carried out to investigate the kinetics of reactions for the pressure oxidative leaching of a molybdenite concentrate in less than one hour. The effects of oxygen pressure, stirring speed, pulp density, acid concentration and temperature on the leaching rate of the molybdenum were studied. It was found that about 85% of molybdenite was oxidized to molybdic

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leaching molybdenum oxidative antakalniopanorama.lt

Oxidative leaching kinetics of molybdenum-uranium ore in H Jan 28, 2013 The processing of molybdenum-uranium ore in a sulfuric acid solution using hydrogen peroxide as an oxidant has been investigated. The leaching temperature, hydrogen peroxide concentration, sulfuric acid concentration, leaching time, particle size, liquid-to-solid ratio and agitation speed all have significant effects

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Leaching Molybdenum Oxidative

The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium, phosphorus and arsenic et al. are also dissolved in the

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Oxidative leaching kinetics of molybdenum-uranium ore in

28/01/2013 Oxidative leaching kinetics of molybdenum-uranium ore in H 2 SO 4 using H 2 O 2 as an oxidizing agent. T. A. Lasheen 1, M. E. El-Ahmady 1, H. B. Hassib 2 & A. S. Helal 1 Frontiers of Chemical Science and Engineering volume 7, pages 95–102 (2013)Cite this article. 288 Accesses. 9 Citations. Metrics details. Abstract. The processing of molybdenum-uranium ore in a sulfuric acid solution using

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Oxidative leaching kinetics of molybdenum-uranium ore in

The processing of molybdenum-uranium ore in a sulfuric acid solution using hydrogen peroxide as an oxidant has been investigated. The leaching temperature, hydrogen peroxide concentration, sulfuric acid concentration, leaching time, particle size, liquid-to-solid ratio and agitation speed all have significant effects on the process. The optimum process operating parameters were: temperature

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leaching molybdenum oxidative oc-aerodecap.fr

Leaching molybdenum from a low-grade roasted . 07/03/2019 The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium

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leaching molybdenum oxidative----

Oxidative leaching kinetics of molybdenum-uranium Oxidative leaching kinetics of molybdenum-uranium ore in H 2 SO 4 using H 2 O 2 as an oxidizing agent: Oxidative leaching kinetics of molybdenum-uranium ore in H 2 SO 4 using H 2 O 2 as an oxidizing agent. UP-GRADATION OF MoO3 COPPER, IRON, ZINC

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Leaching molybdenum from a low-grade roasted molybdenite

07/03/2019 The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20,21,22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium, phosphorus and arsenic et al. are also dissolved in the leaching solutions.

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CA2793240A1 Method of oxidative leaching of molybdenum

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

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leaching molybdenum oxidative antakalniopanorama.lt

Oxidative leaching kinetics of molybdenum-uranium ore in H Jan 28, 2013 The processing of molybdenum-uranium ore in a sulfuric acid solution using hydrogen peroxide as an oxidant has been investigated. The leaching temperature, hydrogen peroxide concentration, sulfuric acid concentration, leaching time, particle size, liquid-to-solid ratio and agitation speed all have significant effects

get price

Leaching Molybdenum Oxidative

The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium, phosphorus and arsenic et al. are also dissolved in the

get price

leaching molybdenum oxidative oc-aerodecap.fr

Leaching molybdenum from a low-grade roasted . 07/03/2019 The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium

get price

leaching molybdenum oxidative----

Oxidative leaching kinetics of molybdenum-uranium Oxidative leaching kinetics of molybdenum-uranium ore in H 2 SO 4 using H 2 O 2 as an oxidizing agent: Oxidative leaching kinetics of molybdenum-uranium ore in H 2 SO 4 using H 2 O 2 as an oxidizing agent. UP-GRADATION OF MoO3 COPPER, IRON, ZINC

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Molybdenum Recovery from Mineral Raw Materials by

2.2.2. Autoclave-oxidative leaching of MoS2 concentrates with pyrolusite product According to Kholmogorov et al. (1985, 1994), this kind of leaching can be described by the following reaction: MoS2(s) + 9MnO2(s) + 8H2S4(l) MoO2SO4(s) + 9MnSO4(l) + 8H2O t 150 oC (4) Then manganese and molybdenum are separated:

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Kinetics of pressure oxidative leaching of molybdenite

Pressure leaching Nitric acid Kinetics The current study was carried out to investigate the kinetics of reactions for the pressure oxidative leaching of a molybdenite concentrate in less than one hour. The effects of oxygen pressure, stirring speed, pulp den-sity, acid concentration and temperature on the leaching rate of the molybdenum were

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Technology Summary Suitable for public dissemination

MetaLeach has been granted a patent for a Method Oxidative Leaching of Molybdenum Rhenium Sulphide Ores and/or Concentrates in Australia, with patents in other countries pending. The patent is directed to the MoReLeach technology, a sister technology to the Company’s HyperLeach® technology (patents granted and pending). The patent describes a method for leaching molybdenum and/or

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Hydrometallurgical Treatment for Valuable Metals Recovery

The oxidative leaching of the unroasted CoMo/Al2O3 spent catalyst was performed without previous grinding. In a single-step, at pH = 1.3 with a stoichiometric factor equal to 2.4, an L/S ratio equal to 7.5, and an H2O2 concentration of 3.75 mol·L−1, it was possible to recover molybdenum and cobalt simultaneously with leaching yields of 90% and 83%, respectively, without dissolving more than

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Leaching Molybdenum Oxidative

The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium, phosphorus and arsenic et al. are also dissolved in the

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METHOD OF OXIDATIVE LEACHING OF MOLYBDENUM

METHOD OF OXIDATIVE LEACHING OF MOLYBDENUM-RHENIUM SULFIDE ORES AND/OR CONCENTRATES . Mar 3, 2011 METALEACH LIMITED. 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

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leaching molybdenum oxidative oc-aerodecap.fr

Leaching molybdenum from a low-grade roasted . 07/03/2019 The leaching molybdenum from low-grade molybdenite concentrate has been widely investigated, mainly in relation to acidic oxidative leaching for the direct extraction of molybdenum [20, 21, 22]. The advantages lie in no SO 2 emission but the impurities such as iron, calcium, magnesium

get price

Pressure aqueous oxidation of molybdenite concentrate with

01/12/2017 The leaching of molybdenum can be enhanced by increasing the oxygen partial pressure from 0.5 to 2 magnesium and aluminum are the main components associated with molybdenum and sulphur. During the oxidative leaching process, the leaching solution was acidic; thus, most elements, such as magnesium and aluminum, were soluble, and silicon was the main component in the final leach

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Oxidative leaching kinetics of molybdenum-uranium ore in H

Oxidative leaching kinetics of molybdenum-uranium ore in H The leaching kinetics of molybdenum showed that the reaction rate of the leaching process is controlled by the chemical reaction at the particle surface. The leaching process follows the kinetic model 1 ? (1? ) = with an apparent activation energy of 40.40 kJ/mole. The temperature, concentrations of H O and H SO and the mesh size

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Kinetics of pressure oxidative leaching of molybdenite

Pressure leaching Nitric acid Kinetics The current study was carried out to investigate the kinetics of reactions for the pressure oxidative leaching of a molybdenite concentrate in less than one hour. The effects of oxygen pressure, stirring speed, pulp den-sity, acid concentration and temperature on the leaching rate of the molybdenum were

get price

Molybdenum Recovery from Mineral Raw Materials by

2.2.2. Autoclave-oxidative leaching of MoS2 concentrates with pyrolusite product According to Kholmogorov et al. (1985, 1994), this kind of leaching can be described by the following reaction: MoS2(s) + 9MnO2(s) + 8H2S4(l) MoO2SO4(s) + 9MnSO4(l) + 8H2O t 150 oC (4) Then manganese and molybdenum are separated:

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Technology Summary Suitable for public dissemination

MetaLeach has been granted a patent for a Method Oxidative Leaching of Molybdenum Rhenium Sulphide Ores and/or Concentrates in Australia, with patents in other countries pending. The patent is directed to the MoReLeach technology, a sister technology to the Company’s HyperLeach® technology (patents granted and pending). The patent describes a method for leaching molybdenum and/or

get price

How is Molybdenum Extracted samaterials

Electrooxidation 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

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Deactivation behavior of an iron-molybdate catalyst during

From 10 to 600 h on stream leaching of molybdenum from the remaining iron molybdate phase (Fe 2 (MoO 4) 3, Mo/Fe = 1.5) leads to iron rich phases (FeMoO 4 and Fe 2 O 3, Me/Fe < 1.5) and simultaneously an increase in activity to approximately 1.5 times the initial activity. Even at high degrees of molybdenum loss (Mo/Fe = 0.49) the formaldehyde selectivity remained above 92%, and the

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