• Solvent extraction of rhenium from molybdenum in

    01/07/2009· The objective of this study was that the extraction and separation of rhenium from alkaline leach solutions containing rhenium and molybdenum by solvent extraction using a mixture of tributyl phosphate and triotylamine as extractant. 2. Experimental 2.1. Reagents. The organic phase consists of an extractant, a modifier, and a diluent. The extractant is

    Selective Recovery of Molybdenum over Rhenium from

    Selective Recovery of Molybdenum over Rhenium from Molybdenite Flue Dust Leaching Solution Using PC88A Extractant Ali Entezari-Zarandi 1,2,*, Dariush Azizi 1,3, Pavel Anatolyevich Nikolaychuk 4, Faïçal Larachi 1 and Louis-César Pasquier 3 1 Department of Chemical Engineering, Université Laval, Québec, QC G1V 0A6, Canada; [email protected]

    Separation of rhenium from electric-oxidation leaching

    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. When

    Recovery of Molybdenum and Rhenium Using Selective

    applicable to the leaching of rhenium and molybdenum, the precipitating behavior of rhenium and molybdenum was investigated employing a synthetic NH 4OH leaching solution. A preliminary test was conducted in the conditions of 343.15K, pH 2, 350rpm, and 18,000s of reaction time using 500cm3 of solution for the verification of the formation of molybdenum

    Separation of rhenium and molybdenum from

    01/02/2013· 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

    Separation of Rhenium from Lead-Rich Molybdenite

    Oxidative roasting-ammonia leaching was then carried out for separation of rhenium and extraction of molybdenum. The hydrochloric acid leaching experiments revealed that 93.6% Pb and 97.4% Ca were removed when the leaching was performed at 95 °C for 10 min with HCl concentration of 8 wt. % and liquid-solid ratio of 5 (mL/g). The results of direct oxidative

    The solvent extraction separation of molybdenum and

    01/08/1995· Molybdenum recovery from acid leach residual solution The residual solution generated in the acid leaching step contains variable but significant amounts of molybdenum, copper, rhenium and iron. In order to recover its contents of molybdenum, this solution was treated by means of solvent extraction by contacting with an organic solvent formed by

    Novel Aqueous Processing of the Reverted Turbine-Blade

    The first use of phosphinic acid in molybdenum separation from rhenium in the leach liquor yielded a high separation value (βMo/Re = 839) using 0.067 mol L–1 extractant; whereas the mixed-phosphine oxides showed a tremendous selectivity for separating rhenium from the base-metal impurities in the Mo-depleted solution. The extraction of rhenium increased from 9% to

    Recovery of molybdenum from leach solution using

    01/12/2019· In this research, extraction and purification of molybdenum from a leach solution of molybdenite dissolution was performed. Cationic polyelectrolytes were used for the first time in this study for selective recovery of molybdenum. For this purpose, some water-soluble coagulants of KlarAid PC products were employed and the experimental results in terms of

    RHENIUM AND MOLYBDENUM SEPARATION FROM

    The process comprises reacting the molybdenum and rhenium-bearing, sulfide ore containing other metallic impurities with controlled amounts of an alkali metal carbonate under controlled temperature to form water-soluble molybdenum, rhenium and sulfur compounds, leaching the resulting fusion mass under controlled conditions to remove about 95 percent by weight of the molybdenum

    (PDF) Investigation on selective rhenium leaching from

    Results are shown in Figures 1 and 2 for variation in recovery of rhenium and molybdenum with time. Based on chemical analysis of dust, recovering 100% of Re in leaching process, would results a 300 ppm of rhenium leach solution content. Corresponding amount of Mo in solution would be obtained by modeling the curves fitted of data for Re and Mo

    Separation of rhenium and molybdenum from

    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 extraction to recover and separate rhenium and molybdenum from the leached liquor. The effects of pH and the chemicals' concentration on

    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

    Investigation on selective rhenium leaching from

    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 phase. On the other hand, addition of small amounts of alcohols (5-15%) makes a noticeable separation of rhenium over molybdenum

    Behavior of Extraction, Stripping, and Separation

    Behavior of Extraction, Stripping, and Separation Possibilities of Rhenium and Molybdenum from Molybdenite Roasting Dust Leaching Solution Using Amine Based Extractant Tri-Otyl-Amine (TOA) Jingu Kang 2, Yung-Uk Kim,Sung-Ho Joo1,2, Ho-Sung Yoon 1, J. Rajesh Kumar,Kyung-Ho Park 1, P. K. Parhi and Shun Myung Shin1,2,+ 1Mineral Resources Research Division,

    Leaching and Separation of Tungsten,Molybdenum and

    Leaching and Separation of Tungsten,Molybdenum and Rhenium from Waste Superalloys after Sulfuric Acid Leaching Author(s): FAN Xing-xiang,XING Wei-dong,DONG Hai-gang,ZHAO Jia-chun,WU Yue-dong,LIU Yang,FU Guang-qiang,Sino-platinum Metals Co.,Ltd.,State Key Lab.Adv.Technol.Comprehensive Utilization of Platinum Metals,Kunming Institute of

    Extraction of molybdenum and rhenium from

    Electrooxidation techniques were investigated on a bench scale by the Bureau of Mines to determine the applicability of the process for extracting molybdenum and rhenium from low-grade molybdenite concentrates. Parameters affecting the extraction, such as pulp density, power consumption, reagent

    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

    Method of separating rhenium and molybdenum

    The disadvantage of this method is the significant loss of rhenium and molybdenum in the neutralization process solutions up to pH 6.5-8.0 and filtering the resulting solution (EN 2096333, CL 01G 39/00, C01G 47/00, 1997). The technical result of the present invention is to increase the degree of extraction of rhenium from the source of process water solutions. This technical

    Recent advances of rhenium separation and enrichment in

    Specifically, rhenium could be obtained as a byproduct from the copper leaching and molybdenum oxidation processing . The core step was an activated carbon column circuit for absorption of the aqueous rhenium. During the desorption processing, rhenium was stripped byan eluent solution at the pH of 7 and the temperature of 80–110 ℃. The eluent contained

    Separation of rhenium from electric-oxidation leaching

    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. When temperature is 30 °C,

    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

    Separation of Rhenium from Lead-Rich Molybdenite

    Oxidative roasting-ammonia leaching was then carried out for separation of rhenium and extraction of molybdenum. The hydrochloric acid leaching experiments revealed that 93.6% Pb and 97.4% Ca were removed when the leaching was performed at 95 °C for 10 min with HCl concentration of 8 wt. % and liquid-solid ratio of 5 (mL/g). The results of direct oxidative roasting indicated that 89.3%

    Behavior of Extraction, Stripping, and Separation

    Behavior of Extraction, Stripping, and Separation Possibilities of Rhenium and Molybdenum from Molybdenite Roasting Dust Leaching Solution Using Amine Based Extractant Tri-Otyl-Amine (TOA) Jingu Kang 2, Yung-Uk Kim,Sung-Ho Joo1,2, Ho-Sung Yoon 1, J. Rajesh Kumar,Kyung-Ho Park 1, P. K. Parhi and Shun Myung Shin1,2,+ 1Mineral Resources Research Division, Korea Institute of

    Breakthrough curves for adsorption and elution of rhenium

    Impure rhenium and molybdenum bearing solution was passed through a column of Varian strong base anionic resin for selective adsorption of rhenium and molybdenum ions from the solution. Elution of molybdenum and rhenium was carried out using 2 N NaOH and 0.2 N NH 4SCN, respectively. The effect of resin bed height on breakthrough time was investigated. Experimental and theoretical curves

    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

    Method of separating rhenium and molybdenum

    The disadvantage of this method is the significant loss of rhenium and molybdenum in the neutralization process solutions up to pH 6.5-8.0 and filtering the resulting solution (EN 2096333, CL 01G 39/00, C01G 47/00, 1997). The technical result of the present invention is to increase the degree of extraction of rhenium from the source of process water solutions. This technical result is achieved

    Extraction of molybdenum and rhenium from

    Electrooxidation techniques were investigated on a bench scale by the Bureau of Mines to determine the applicability of the process for extracting molybdenum and rhenium from low-grade molybdenite concentrates. Parameters affecting the extraction, such as pulp density, power consumption, reagent

    Recent advances of rhenium separation and enrichment in

    Specifically, rhenium could be obtained as a byproduct from the copper leaching and molybdenum oxidation processing . The core step was an activated carbon column circuit for absorption of the aqueous rhenium. During the desorption processing, rhenium was stripped byan eluent solution at the pH of 7 and the temperature of 80–110 ℃. The eluent contained approximately 2.5% sodium

    MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM

    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 4 Ibid., p. 850. 5 "Molybdenum and Molybdenum Alloys," from Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed.,

    Investigation on selective rhenium leaching from

    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 phase. On the other hand, addition of small amounts of alcohols (5-15%) makes a noticeable separation of rhenium over molybdenum, but by

    Novel Aqueous Processing of the Reverted Turbine-Blade

    The first use of phosphinic acid in molybdenum separation from rhenium in the leach liquor yielded a high separation value (βMo/Re = 839) using 0.067 mol L–1 extractant; whereas the mixed-phosphine oxides showed a tremendous selectivity for separating rhenium from the base-metal impurities in the Mo-depleted solution. The extraction of rhenium increased from 9% to 98% with an increase in

    Breakthrough curves for adsorption and elution of rhenium

    Impure rhenium and molybdenum bearing solution was passed through a column of Varian strong base anionic resin for selective adsorption of rhenium and molybdenum ions from the solution. Elution of molybdenum and rhenium was carried out using 2 N NaOH and 0.2 N NH 4SCN, respectively. The effect of resin bed height on breakthrough time was investigated. Experimental and theoretical curves

    Separation of rhenium and molybdenum from

    کتابخانه مرکزی دانشگاه صنعتی شریف Separation of rhenium and molybdenum from molybdenite leach liquor by the solvent extraction method,Author: Khoshnevisan, A.,Publisher:,2013

    Method of separating rhenium and molybdenum

    The disadvantage of this method is the significant loss of rhenium and molybdenum in the neutralization process solutions up to pH 6.5-8.0 and filtering the resulting solution (EN 2096333, CL 01G 39/00, C01G 47/00, 1997). The technical result of the present invention is to increase the degree of extraction of rhenium from the source of process water solutions. This technical result is achieved

    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

    Extraction of molybdenum and rhenium from

    Electrooxidation techniques were investigated on a bench scale by the Bureau of Mines to determine the applicability of the process for extracting molybdenum and rhenium from low-grade molybdenite concentrates. Parameters affecting the extraction, such as pulp density, power consumption, reagent

    JP2016191118A Method for recovering rhenium from

    The present invention provides a method for recovering rhenium from molybdenum concentrate capable of improving the volatilization rate of rhenium oxide by a safer and more productive method than before. A pretreatment step of leaching copper and calcium contained in molybdenum concentrate using an acidic aqueous solution containing chloride ions, and oxidation roasting for oxidizing and

    Recent advances of rhenium separation and enrichment in

    Specifically, rhenium could be obtained as a byproduct from the copper leaching and molybdenum oxidation processing . The core step was an activated carbon column circuit for absorption of the aqueous rhenium. During the desorption processing, rhenium was stripped byan eluent solution at the pH of 7 and the temperature of 80–110 ℃. The eluent contained approximately 2.5% sodium

    Method of processing sulphide and mixed molybdenum

    After leaching, molybdenum and rhenium are extracted from the solution. EFFECT: higher extraction ratio of molybdenum with concomitant extraction of rhenium. 4 cl, 1 tbl, 1 dwg, 1 ex The invention relates to the field of non-ferrous metallurgy and can be used for the extraction of molybdenum and rhenium from the sulphide and mixed molybdenum concentrates. A known method for the recovery

 

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