leaching molybdenum method
Leaching molybdenum from a low-grade roasted
2019-3-7 · Molybdenum is a refractory metal with high boiling point and high melting point, mainly used in nonferrous metallurgy, oil and gas industry, and is a strategic metal for industrial, pharmaceutical, human and plant essential elements [].Molybdenite is the main raw material for the extraction of molybdenum, and the method of molybdenum ore treatment includes fire and
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Selective leaching of molybdenum from spent ...
2012-11-1 · The microwave-assisted method, using a 10 g/L NaOH solution, allowed more selective leaching than the conventional process (89–91% and 5.7–8.8% of Mo and Al were extracted, respectively, depending on the type of catalyst); this high selectivity was a consequence of the high pressure, which increased the leaching of Mo with a consequent ...
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Metals | Free Full-Text | Selective Leaching of Molybdenum ...
2021-11-26 · This paper proposes selective leaching of molybdenum from Mo/Cu complex bulk concentrates in a 5 M NaCl solution using the electro-oxidation method. Here, the effects of several factors such as pH, pulp density, current density, and temperatures were investigated. A higher leaching yield of Mo increased with increasing pH from 5 to 9 and decreased with
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Recovery of molybdenum from leach solution using ...
2019-12-1 · Fig. 11. A schematic of molybdenum recovery and purification from leach liquor using a cationic polyelectrolyte. A remarkable point is the simplicity of the proposed method. So that coagulation occurs as soon as polyelectrolytes are added to the solution and molybdenum ions are precipitated in the form of small flakes.
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Molybdenum blue photometry method for the
2015-5-28 · An improved analytical procedure has been described for the spectrophotometric determination of colloidal silica in leaching solution by means of adding fluoride to convert colloidal silica into reactive silica. The method is a variation of the classical molybdenum blue method, and the optimal wavelength, te
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How is Molybdenum Extracted - samaterials
2021-7-23 · 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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Extraction of Molybdenum from Spent HDS Catalyst by ...
2021-8-20 · Molybdenum bearing spent hydrodesulphurization (HDS) catalyst is an important secondary resource. In the present research, the extraction of molybdenum from the roasted spent HDS catalyst was investigated by pressure alkaline leaching using NaOH and Na 2 CO 3, respectively.The process of pressure leaching using Na 2 CO 3 solution was characterized by
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新的生产工艺 - 中钨在线钼制品 - Molybdenum
2016-8-8 · 新的生产工艺. With acid and an oxidant directly on molybdenum nickel ore symbiotic process nickel salt leaching method of molybdenum, nickel ore will be crushed molybdenum milling, then use the acid and oxidant leaching, filtration, extraction and back extraction by ammonium molybdate, raffinate solution and then get through the ...
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Hydrometallurgical recovery of molybdenum from the
2021-1-11 · The dissolution of molybdenite (MoS2) was studied leaching with acid solution or decomposing with using various oxidizing agents including hypochlorite, carbonate solution. If acid leaching is used, provisions ozone, oxygen-alkali, acid-permanganate, persulfate, should be made to prevent complexing of molybdenum
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(PDF) Extractive Metallurgy of Rhenium: A Review
2022-2-4 · “Method of oxidative leaching of molybdenum-rhenium sul- de ores and/or concentrates,” the process involves leaching . a molybdenum/rhenium
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Selective leaching of molybdenum from spent ...
Selective leaching of molybdenum from spent hydrodesulphurisation catalysts using ultrasound and microwave methods November 2012 Hydrometallurgy s 129–130:19–25
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Metals | Free Full-Text | Selective Leaching of Molybdenum ...
2021-11-26 · This paper proposes selective leaching of molybdenum from Mo/Cu complex bulk concentrates in a 5 M NaCl solution using the electro-oxidation method. Here, the effects of several factors such as pH, pulp density, current density, and temperatures were investigated. A higher leaching yield of Mo increased with increasing pH from 5 to 9 and decreased with
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Selective leaching of vanadium from vanadium
2021-12-15 · Leaching experiments and analysis method2.2.1. Leaching experiments. The VMR powder and leaching agent were mixed in water. Then sealed and stirred to leach. Finally, solid–liquid separation was carried out to obtain leaching liquid and leaching residue. The vanadium and molybdenum leaching efficiency were calculated by: (1) X = C × V α × ...
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How is Molybdenum Extracted - samaterials
2021-7-23 · 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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Acid Leaching Extraction of Mo, V, and Ni Compounds
2019-1-14 · A hydrometallurgical method based on the oxidation of MoS 2 and the transfer of molybdenum compounds into an aqueous solution, which can be used as a catalyst precursor, can be promising for the extraction of an ultrafine molybdenum-containing catalyst. The acid leaching of molybdenum compounds from ore raw materials (poor molybdenite concentrate)
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Extraction of molybdenum and vanadium from the spent ...
Molybdenum (Mo) and vanadium (V) were effectively extracted from the spent diesel exhaust catalyst (V2O5–MoO3/TiO2) by using an ammonia leaching method.
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Recovery and purification of molybdenum from Ni–Mo ore
2010-6-1 · Direct oxidative leaching by caustic-hypochlorite (NaOH + NaClO) solution is an environmental friendly method that has given high molybdenum recovery, but the operation is still inconvenient because of an over-swelling phenomenon
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Molybdenum blue photometry method for the
2015-5-28 · An improved analytical procedure has been described for the spectrophotometric determination of colloidal silica in leaching solution by means of adding fluoride to convert colloidal silica into reactive silica. The method is a variation of the classical molybdenum blue method, and the optimal wavelength, te
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Hydrometallurgical recovery of molybdenum from
2011-5-26 · Ninety six percent leaching recovery of molybdenum by nitric acid pressure leaching of the molybdenite concentrate seems to be an alternative applicable method of molybdenite processing. The effect of acid concentration on the leaching recovery of molybdenum is shown in Fig. 7. Ninety six percent leaching recovery of molybdenum is reached after ...
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Extraction of molybdenum from spent catalyst by salt ...
In order to achieve the best method to recover molybdenum from spent catalysts, various processes have been proposed such as: electro-oxidation,
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Selective leaching of molybdenum from spent ...
Selective leaching of molybdenum from spent hydrodesulphurisation catalysts using ultrasound and microwave methods November 2012 Hydrometallurgy s 129–130:19–25
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Recovery of molybdenum from leach solution using ...
This paper proposes selective leaching of molybdenum from Mo/Cu complex bulk concentrates in a 5 M NaCl solution using the electro-oxidation method.
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Leaching and Recovery of Molybdenum from Spent
2017-10-13 · Zhao Z, Guo M, Zhang M (2015) Extraction of molybdenum and vanadium from the spent diesel exhaust catalyst by ammonia leaching method. J Hazard Mater 286:402–409. doi: 10.1016/j.jhazmat.2014.12.063 CrossRef Google Scholar
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Metals | Free Full-Text | Selective Leaching of Molybdenum ...
2021-11-26 · Selective leaching of Molybdenum from rougher concentrate by electro-oxidation → Selective leaching of Molybdenum from bulk concentrate by electro-oxidation “The reported studies presented that a high leaching yield of Mo was 99%, but molybdenite in residues was still observed in XRD patterns after leaching.
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Study on Leaching of Molybdenum from a Spent HDS
The aim of this study is to investigate the extraction of molybdenum from the spent HDS catalyst. The experiment was performed by using the pyro-hydrometallurgical process; calcination and leaching. The spent catalyst was calcined at different temperatures in order to investigate the effect of calcination temperature on the recovery of molybdenum in the subsequent process.
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Acid extraction of molybdenum, nickel and cobalt from ...
The optimal leaching conditions were a three-stage successive leaching at 80 °C with a leaching time of 2 h and S/L ratio of 0.25 g L(-1). Under these conditions, the achieved mineral sludge sample leaching yields were 85.5%, 40.5% and 93.8% for Mo, Ni and Co, respectively.
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(PDF) Separation of rhenium and molybdenum from ...
An alternative method was offered: hydrothermal sulfidation, the product of which is a collective sulfide concentrate (containing Rhenium heptasulfide Re 2 S 7 , molybdenum and tungsten ...
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Review Molybdenum Recovery from Mineral Raw
2015-12-27 · Technological processes of molybdenum production from raw materials Key technological process Method of processing and Mo recovery from solutions Salt composition of exhausted solutions, g/L 0.1; Fe = 0.002 1 2 3 SO a) Chlorine-soda leaching of sulfide industrial products Mo=0.5 3.5; Cu = 0.02 0.1; Fe=0.003 0.02;SO 4 2-=45-55; (NaCl+Na 2 SO 4 ...
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Hydrometallurgical recovery of molybdenum from the
2021-1-11 · The dissolution of molybdenite (MoS2) was studied leaching with acid solution or decomposing with using various oxidizing agents including hypochlorite, carbonate solution. If acid leaching is used, provisions ozone, oxygen-alkali, acid-permanganate, persulfate, should be made to prevent complexing of molybdenum
Read More
(PDF) Extractive Metallurgy of Rhenium: A Review
2022-2-4 · “Method of oxidative leaching of molybdenum-rhenium sul- de ores and/or concentrates,” the process involves leaching . a molybdenum/rhenium concentrate in a closed reactor vessel .
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