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Mar 27, 2019· leaching process as a first step then solvent extraction was used as a second step to recovery the molybdenum from spent catalyst (Raju et al, 2013; Thi et al, 2015), while bio method was used by Roya et al, 2011; Mafi et *Corresponding author: Khalid M. Mousa al, 2012).Bioleaching follows by the leaching process molybdenum …
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Oct 13, 2018· Here molybdenum concentrates are slurried with hot ferric chloride leach solution to dissolve the copper and lead contaminants present. The primary function of the filtration and thickening circuits is to recover spent ferric chloride leach solution from the leached moly concentrates. Since approximately 2.5 percent of the ferric chloride in ...
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There is provided a process to reclaim molybdenum, vanadium and other hydrodesulfurisation metals from catalysts, said process comprising collecting one or more catalysts containing at least one metal sulfide; leaching the catalyst in an atmospheric alkaline leach step; separating the leached slurry into a first liquid stream and a first …
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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 ...
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leaching process as a first step then solvent extraction was used as a second step to recovery the molybdenum from spent catalyst (Raju et al, 2013; Thi et al, 2015), while bio method was used by Roya et al, 2011; Mafi et *Corresponding author: Khalid M. Mousa al, 2012).Bioleaching follows by the leaching process molybdenum from spent
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Jul 05, 2022· Increasing the activation time from 2 to 4 h significantly increased the leaching rate of the molybdenum. The maximum LR. % was obtained at 4 h leaching time and 4 h mechanical activation equals 80.3%. Therefore, it could be concluded that in the absence of this pre-treatment, the leaching rate percent of molybdenum was very low …
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alkaline leaching recover molybdenum vanadium metals vanadium Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number AU36740/99A Inventor Kevin Arnold Andersen
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This paper adopts the NaOH system of leaching of molybdenum oxide, the base excess coefficient, temperature, time, ratio of liquid to solid and extract ratio conditions influence on the leaching rate of molybdenum, in order to overcome the conventional ammonia leaching process with the problem of low leaching rate of molybdenum. The test …
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Molybdenum Processing. 1. Grinding. A grinding machine crushes rocks the size of footballs to the size of gravel, then uses a ball mill to further reduce the material to the size of cosmetic powder. 2. Flotation. In the flotation process, the ground ore/gangue powder is mixed with a liquid reagent and inflated.
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Jun 12, 1990· @article{osti_6659071, title = {Continuous process for purifying molybdenum}, author = {Scheftic, J L and Christini, J N}, abstractNote = {This patent describes a process for purifying molybdenum trioxide with a controlled content of potassium. It comprises: first leaching impure molybdenum trioxide containing …
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The present invention discloses a process for obtaining technical grade molybdenum trioxide from diluted leaching acid solutions (PLS) containing highly concentrated arsenic, antimony or bismuth. Such a solution is obtained by leaching of metallurgic residues with a high concentration of these impurities, such as casting powders.
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The leach liquor (0.5g/L Mo, 0.05g/L U) obtained from the leaching process of molybdenum-uranium ore material was treated using solvent extraction to recover U(VI) by LIX 622N, which is a salicylaldoxime derivative. The influence of various basic variables such as pH, concentration of LIX 622N, temperature, different stripping reagents, phase ...
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We claim: 1. A process for purifying molybdenite concentrate for the removal of impurities therefrom, which comprises: providing a reactor with heating and agitator means, which reactor is made of a material that can withstand leaching with the use of ferric chloride containing brine at elevated temperatures and pressures; introducing into said reactor …
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The invention provides a process for comprehensively utilizing molybdenum ore leaching slag, which takes sulfuric acid as a leaching agent and adopts a two-stage countercurrent leaching mode to realize that the leaching rates of molybdenum and iron are both higher than 98 percent and the leaching rate of copper is higher than 75 percent and …
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A process for the recovery of molybdenum values from leach muds of molybdenite concentrates which have been roasted in air to convert molybdenum sulfide to molybdenum trioxide and subsequently leached with an aqueous alkaline solution for the recovery of soluble molybdenum salts. Leach mud is treated by the process of this …
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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 …
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Feb 02, 2022· Because of analogous physicochemical properties, the extraction and separation process for molybdenum and vanadium are difficult . ... Study of Molybdenum Extraction from Alkali Roasted and Water Leaching of Ferro-Molybdenum Slag by Using TOA and TBP, J. IOP Conference Series Earth and Environmental Science. 182: …
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A process is disclosed to extract metal values selected from the group consisting of cobalt, molybdenum, nickel, tungsten, and vanadium from metal-containing particles, such as spent hydroprocessing catalyst particles containing carbon residue. In this process, the spent catalyst particles are roasted in an oxygen-containing gas at a temperature of from …
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The invention relates to a technique for leaching molybdenum from nickel-molybdenum ores by a wet process, belonging to the technical field of wet-process smelting of molybdenum. The technique comprises the following steps: by using nickel-molybdenum ore pulp as the raw material, adding water-soluble chlorine salt into the pulp in a Cl< …
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