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leaching molybdenum method

leaching molybdenum method

CN101353803A - Method for leaching molybdenum and rhenium ...

The invention discloses a slurry electrolysis method applied to leach molybdenum and rhenium from molybdenum ore concentrate. The method comprises the following steps: molybdenum ore concentrate containing rhenium is put into an electrolysis bath, wherein, water is added in the electrolysis bath to keep the mass rate of liquid to solid in the range of 10-20: 1, and a mechanical stirring device ...

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Selective leaching of molybdenum from spent ...

2012-11-01  The conventional method for catalyst leaching indicated that a NaOH solution of 10 g/L resulted in a more selective extraction of Mo when compared to the Al concentration in the final solution; nonetheless, the maximum extraction was 77% in 2 h.

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Leaching molybdenum from a low-grade roasted molybdenite ...

2019-03-07  The molybdenum concentration in leaching mixture was determined with using thiocyanate photometric method by visible spectrophotometer (1800P, Shanghai, China). The other components were analyzed by inductively couple plasma atomic emission

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Recovery of molybdenum from leach solution using ...

2019-12-01  The leaching process brings molybdenum and impurities to the solution (leach liquor). Hence, as in the case of acid washing liquor of molybdenum trioxide, a separation and purification treatment is required. There are many routine separation methods in hydrometallurgy.

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How is Molybdenum Extracted

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 solution.

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Method For Leaching Of Copper And Molybdenum Welham ...

A method for leaching copper and molybdenum from an ore, residue and/or concentrate containing such, in which more than 1% of the total molybdenum is present as a sulfide and in which more than 1% of the total copper is present as an oxide, the method comprising the steps of: Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (I)-based oxidising species of a p H of ...

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Molybdenum blue photometry method for the determination of ...

2015-05-28  The method is a variation of the classical molybdenum blue method, and the optimal wavelength, temperature, ratio of H 3 BO 3 /NH 4 F, pH and ammonium molybdate in the colorimetric process has been determined. The pH especially needs to be fairly strictly controlled.

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US Patent Application for METHOD OF LEACHING MOLYBDENUM ...

Disclosed is a method of leaching molybdenum (Mo) from the sulfide mineral containing molybdenum (Mo) and copper (Cu) through the electrolytic oxidation scheme. The method includes dipping the sulfide mineral containing the molybdenum (Mo) and the copper (Cu) into a solution having chloride dissolved therein, loading an electrode into the solution, and then applying a current to the solution.

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WO2010090478A3 - Method for leaching impurities contained ...

The present invention relates to a leaching method that enables the production of good quality molybdenum oxide concentrates by selectively leaching impurities such as copper, iron, lead and zinc from roasted molybdenum oxide concentrates using a leach liquor comprising ammonium chloride and hydrochloric acid. As molybdenum oxide concentrates produced by the leaching method of the

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leaching molybdenum method - lucynajanecka.pl

Leaching molybdenum from a lowgrade roasted . 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 ...

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US Patent Application for METHOD OF LEACHING MOLYBDENUM ...

Disclosed is a method of leaching molybdenum (Mo) from the sulfide mineral containing molybdenum (Mo) and copper (Cu) through the electrolytic oxidation scheme. The method includes dipping the sulfide mineral containing the molybdenum (Mo) and the copper (Cu) into a solution having chloride dissolved therein, loading an electrode into the solution, and then applying a current to the solution.

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Extraction of molybdenum and vanadium from the spent ...

2015-04-09  Molybdenum (Mo) and vanadium (V) were effectively extracted from the spent diesel exhaust catalyst (V2O5-MoO3/TiO2) by using an ammonia leaching method. Meanwhile, the structure of the spent catalyst carrier (TiO2) was not destroyed and might be reused. The effects of ammonia (NH3 H2O) concentration, leaching temperature and time, concentration of hydrogen peroxide (H2O2) and

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leaching molybdenum method - salesenmarketingprofs.nl

2020-07-08  The method of extraction of molybdenum from molybdenum cinder, including leaching with translation of molybdenum in solution by treatment with a solution containing a carbonate of an alkali metal, characterized in that as a carbonate of an alkali metal use potassium carbonate and carry out leaching solution, optionally containing potassium nitrate, when the ratio (by weight) 2 CO 3:Mo

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PAPER OPEN ACCESS Study of Molybdenum Extraction from ...

99.5% molybdenum leaching efficiency by hot water. And leave impurity metal like Fe, Mg and Ca ions in leaching Raffinate. In solvent experiments, the organic phase is composed of TOA as extractant, TBP as modifier and kerosene as diluent. The effect of solvent extraction efficiency on different parameters such as pH and TOA/TBP concentrations. The result indicated the process was an effective ...

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Gold Recovery from Molybdenum Concentrate by Cyanide Leaching

2018-04-03  Here we describe a cyanide leaching-carbon adsorption plant designed to recover the gold from the molybdenum concentrate. Process Design: The molybdenum concentrate assays typically, 45 percent molybdenum, less than 1 percent copper (chalcopyrite) and 3.5-5.0 percent iron (chalcopyrite-pyrite).Gold and silver average 8 and 40 ppm respectively which at an average molybdenum concentrate ...

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Application of Taguchi method for optimization of process ...

2018-06-29  A new purification method for molybdenum disulfide via NaNO 3 –HCl–HNO 3 synergistic leaching at 80 °C was developed. The effects of the concentration of NaNO 3, HCl, and HNO 3, and liquid–solid ratio and the leaching time on the purification of molybdenum disulfide were investigated by orthogonal array design methodology.The results of Taguchi method utilizing L 25 (5 5) orthogonal ...

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Preparation and characterization of molybdenum trioxide ...

The leaching efficiency for 20% soda roasted sample at 10% pulp density was 99.8%. From the solution molybdenum was precipitated out as ammonium molybdate at pH 1.0 with HCl and ammonium chloride. This ammonium molybdate was calcined at 750oC to get MoO 3. The product was characterized by XRD. Its purity was determined titrimetri-cally and by ICP-AES. Key words: Spent Catalyst, Soda Roasting ...

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Spectrophotometric determination of phosphate in matrices ...

(molybdenum blue) (Murphy and Riley 1962). The molybde-num blue method is generally used to measure phosphate from particle leaching when the final matrix does not inter-fere with colored complex formation. The solution that results from 1 mol L21 HCl or H 2SO 4 leaching, and total resi-due dissolution are acidic. In such solutions, P can be ana-lyzed with the Murphy–Riley method only if ...

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leaching molybdenum method - brasserie-mino.fr

A method for leaching copper and molybdenum from a material selected from a group consisting of one or more of an ore residue and concentrate containing such in which more than 1 w/w of the total molybdenum is present as a sulfide and in which more than 1 w/w of the total copper is present as an oxide the method comprising the steps of . More Info ; Getting to know leachingChromic. Oct 03 2018 ...

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Method of oxidative leaching of molybdenum--rhenium ...

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 ...

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Molybdenum blue photometry method for the determination of ...

2015-05-28  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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Method For Leaching Of Copper And Molybdenum Welham ...

A method for leaching copper and molybdenum from an ore, residue and/or concentrate containing such, in which more than 1% of the total molybdenum is present as a sulfide and in which more than 1% of the total copper is present as an oxide, the method comprising the steps of: Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (I)-based oxidising species of a p H of ...

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method for leaching of copper and molybdenum

method for leaching of copper and molybdenum. There are forty years of manufacturing history, with three major production bases,over 160 senior RD engineers and 600+ large and medium-sized digital processing equipment, The first-line technicians and professional after-sales service personnel up to 2,300+ and 200+ respectively.Introducing advanced technology and craftsmanship, adopting ...

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leaching molybdenum method - salesenmarketingprofs.nl

2020-07-08  The method of extraction of molybdenum from molybdenum cinder, including leaching with translation of molybdenum in solution by treatment with a solution containing a carbonate of an alkali metal, characterized in that as a carbonate of an alkali metal use potassium carbonate and carry out leaching solution, optionally containing potassium nitrate, when the ratio (by weight) 2 CO 3:Mo

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Leaching and Kinetic Modelling of Molybdenite Concentrate ...

molybdenite dissolution kinetics, using the Taguchi method. From analysis of variance (ANOVA) for molybdenum extraction, the most significant factors were H 2O 2 concentration, pulp density and reaction temperature. The optimal factor levels to maximize extraction were determined. As the leaching process does not result in an ash layer, only chemically kinetic model controlled was applied ...

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CN104313317B - A kind of nickel-molybdenum ore oxidizing ...

The invention discloses a kind of nickel-molybdenum ore oxidizing acid leaching nickel and the method for molybdenum, the method be the mixed material being made up of nickel-molybdenum ore powder and pyrolusite powder is mixed with acid solution after, join in autoclave;In autoclave, add soluble sulphate, after carrying out high-temperature high-voltage reaction leaching, solid-liquid ...

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US3694147A - Process for the purification of molybdenum ...

leaching molybdenum concentrate solution molybdenum oxide Prior art date 1971-11-18 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.) Expired - Lifetime Application number Inventor James Louis Drobnick Tom Tse-Pu Chen Current Assignee (The listed ...

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Molybdenum Processing - IMOA

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 ...

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Method for leaching molybdenum and rhenium from molybdenum

The invention discloses a slurry electrolysis method applied to leach molybdenum and rhenium from molybdenum ore concentrate. The method comprises the following steps: molybdenum ore concentrate containing rhenium in the method is put into an electrolysis bath in which water is added to keep the mass weight rate of liquid to solid in the range of 10-20:1, and a mechanical stirring device is ...

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Extraction of molybdenum and vanadium from the spent ...

2015-04-09  Molybdenum (Mo) and vanadium (V) were effectively extracted from the spent diesel exhaust catalyst (V2O5-MoO3/TiO2) by using an ammonia leaching method. Meanwhile, the structure of the spent catalyst carrier (TiO2) was not destroyed and might be reused. The effects of ammonia (NH3 H2O) concentration, leaching temperature and time, concentration of hydrogen peroxide (H2O2) and

Get Price

Molybdenum blue photometry method for the determination of ...

2015-05-28  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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Study on Leaching of Molybdenum from a Spent HDS Catalyst ...

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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Method of extraction of molybdenum from molybdenum ...

The method of extraction of molybdenum from molybdenum cinder, including leaching with translation of molybdenum in solution by treatment with a solution containing a carbonate of an alkali metal, characterized in that as a carbonate of an alkali metal use potassium carbonate and carry out leaching solution, optionally containing potassium nitrate, when the ratio (by weight) 2 CO 3:Mo about in ...

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Gold Recovery from Molybdenum Concentrate by Cyanide Leaching

2018-04-03  Here we describe a cyanide leaching-carbon adsorption plant designed to recover the gold from the molybdenum concentrate. Process Design: The molybdenum concentrate assays typically, 45 percent molybdenum, less than 1 percent copper (chalcopyrite) and 3.5-5.0 percent iron (chalcopyrite-pyrite).Gold and silver average 8 and 40 ppm respectively which at an average molybdenum concentrate ...

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Hydrometallurgical recovery of molybdenum from Egyptian ...

lies in replacement of pyrometallurgical processing with a hydrometallurgical method using oxygenated nitric acid leaching under atmospheric and oxygen pressure. The effects of temperature, acid concentration, partial pressure as well as the kinetics of leaching process were studied. keywords: hydrometallurgy, flotation, leaching, molybdenum, kinetics 1. Introduction Molybdenite deposits in ...

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How Is Molybdenum Mined and Processed? Refractory Metals ...

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

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Synthesis of iron molybdate from molybdenum spent catalyst ...

2020-11-14  The current manuscript deals with synthesis of iron molybdate nano-material from molybdenum spent catalyst via roasting, leaching, and hydrothermal precipitation. Experimental parameters like ratio of spent catalyst to sodium carbonate during roasting, time duration of leaching, and concentration of ammonia to obtain molybdenum into leach solution were optimized. A

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In situ recovery, an alternative to conventional methods ...

In the 1970s and early 1980s an in situ leaching project was carried out to extract copper from oxide ores at Miami, Arizona. This in situ leaching project operated for 7 years and closed down in 1982 (O'Gorman et al., 2004). ISR trials were carried out at several sites near Mount Isa, Queens-land in the1970s(O'Gormanet al., 2004). The ...

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