molybdenum rhenium leaching
Commercial rhenium is extracted from molybdenum roaster-flue gas obtained from copper-sulfide or Some molybdenum ores contain 0001% to 02% rhenium   Rhenium(VII) oxide and perrhenic acid readily dissolve in water; they are leached from flue dusts and gasses and extracted by precipitating with potassium or ammonium chloride as the .
patent for molybdenum and rhenium ores is a significant addition to the range of metals covered by the Company's leaching technology The MoReLeach process, a sister technology to MetaLeach’s HyperLeach® technology, is used on molybdenum bearing ,
May 28, 2015· Abstract: 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; ,
Keywords: leaching, flue dust, molybdenum, rhenium, selectivity 1 Introduction Rhenium is a less common metal, characterized by its high melting point and its important role in petrochemical, aerospace and metallurgical industri It does not form its own minerals but
Jul 23, 2014· Add Na2CO3 roasting molybdenite can be selectively converted into soluble molybdenum and rhenium sodium, calcine by flooding after the separation of molybdenum and rhenium and other insoluble impurities can be achieved, the leaching solution after purification using activated carbon adsorption and separation of molybdenum rhenium, sulfur into .
This leach solution contains the remainder of the molybdenum and approximately 95 percent of the rhenium This solution is then in the form to separate sodium molybdate from the sodium perrhenate by either ion exchange or solvent extraction or some other technique, with the rhenium going to rhenium recovery and the molybdenum recycled to the .
Mar 07, 2019· A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating speed on leaching rate of molybdenum was studied
multiple runs due to the leaching of the active rhenium speci We undertook a study to determine which parameters control the leaching behavior We observed that leaching was promoted by the presence of the diol The severity of the leaching was dependent on not only the support, but the choice of reactant and solvent
Abstract The present work addresses the recovery of rhenium from scrub liquor of molybdenite concentrate roasting fume and dust by solvent extraction method According to the results, recovery of rhenium from the scrub liquor is not practical unless molybdenum is removed in advance The extraction of molybdenum was carried out using a D2EHPA-TBP system which resulted in up to ,
The Sierrita property consists of two openpits: Sierrita- -Esperanza pit, and a molybdenum satellite pit; a 115,000-ton-per-day concentrator, two molybdenum roasting plants, a rhenium plant, an oxide and low-grade sulfide stockpile leaching operation, and a copper sulfate plant
by chemical leaching is required to minimize impuriti As such, as illustrated in Table 2 based on worldwide operating data, less than 50% of the molybdenum is finally recovered to the concentrate This after full costs have been absorbed for mining and milling Then typically, the molybdenum and copper concentrates are shipped for smelting
May 12, 2017· The Merlin Project is based on the world's highest grade molybdenum and rhenium deposit, discovered by the Company in late 2008 with an initial Mineral Resource announced in mid-2009 The project has successfully progressed through the scoping, pre-feasibility and feasibility study phas
molybdenum catalyst MoO x /TiO 2 was reported  Two issues are noted for the solid ReO x DODH catalysts: the high price of rhenium and in most applications, some leaching of the active rhenium speci The goal of this work was to test new strategies to immobilize rhenium and to explore the capability of other transition metals to catalyze .
Rhenium Recovery Some molybdenite concentrates, a by-product from copper ore, contain small amounts of rhenium (< 010%) The recovery of rhenium by molybdenum roaster is one of the main industrial sources of this rare metal Molybdenum Iron Smelting About 30-40% of the industrial molybdenum oxide is processed
leaching molybdic oxide gpl molybdenum rhenium Prior art date 1974-10-17 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 US05/605,443 Inventor Derek G E Kerfoot .
Oct 01, 2015· Different pulp densities (3–9%) and initial pH values (15–19) were also tested in the bioleaching experiments but their effects were masked by enhancement of copper leaching due to silver catalysis Molybdenum and rhenium responded comparably to changes in bioleaching conditions, suggesting that Re was located in the molybdenite matrix
EXTRACTION OF RHENIUM FROM MOLYBDENITE CONCENTRATES: Mahesh C Jha, William A May, Entech Molybdenum Inc, 5950 McIntyre Street, Golden, CO 80403-7499 By-product molybdenite concentrates from copper mines are the most important source of rhenium The rhenium content is low, generally in the few hundred ppm range
Sep 17, 2013· Molybdenum-containing waste catalyst at 773 ~ 823K temperature calcine to remove carbon, hydrocarbons and sulfur, calcined product through pulverized in 473K temperature sulfuric acid solution leaching, filtered to make the potassium alum precipitate and cobalt-nickel-aluminum-vanadium-molybdenum leaching liquid separation
rhenium is usually associated with molybdenum ore in the form of ReS2, molybdenum and rhenium generally become enriched in the molybdenum concentrate during mineral processing  Rhenium is a rare and precious metal characterized by high temperature resistance, corrosion resistance, a special electronic configuration.
rhenium (VII) oxide, Re 2 O 7, from the sulfurous gas phase generated during hearth roasting (in molybdenum processing) and smelting (in copper processing)7−9 An alternative process relies on the pressure leaching of molybdenite concentrat Rhenium is solubilized during the pressure leaching ,
Sep 27, 2020· The rhenium in the molybdenum concentrate is mainly recovered from the oxidative roasting flue gas leaching liquid or oxygen pressure cooking liquid of the molybdenum concentrate, and then extracted from the solution or ion exchange method to make potassium perrhenate or ammonium perrhenate , And then use the reduction method to make high .
Mar 07, 2019· A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating speed on leaching rate of molybdenum ,
metals Article 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] (DA); [email protected] .
Recovery of Molybdenum and Rhenium Using Selective Precipitation Method from Molybdenite Roasting Dust in Alkali Leaching Solution Sung-Ho Joo1,2, Young-Uk Kim1, Jin-Gu Kang 2, Ho-Sung Yoon , Dong-Su Kim3 and Shun Myung Shin1,2,+ 1Department of Resource Recycling, University of Science & Technology (UST), Daejon 305-350, Korea 2Metal Recovery Group, Mineral Resources ,
----- primary molybdenum and rhenium subcategory table of contents (continued) section page molybdenum sulfide leaching 33 roaster s0£ scrubber 33 molybdic oxide leachate 34 hydrogen reduction furnace scrubber 34 depleted rhenium scrubbing solution 35 sulfur1c acid plant slowdown 35 vi selection of pollutant parameters 69 conventional and nonconventional pollutant parameters 69 ,
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 of Re in leaching process, would results a 300 ppm of rhenium leach solution content
Leaching tests in sulphate medium reveal that the acidic leaching solution contains both rhenium and molybdenum Our results and also other investigations show that rhenium can be efficiently recovered with tertiary amines  However molybdenum is co-extracted by these amin The modification of the amine extraction system with tributyl .
The first use of phosphinic acid in molybdenum separation from rhenium in the leach liquor yielded a high separation value (β Mo/Re = 839) using 0067 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
Solutions A and B, which came from the leaching and purification processes of molybdenite roasted flue dusts were used in this study as initial solutions Table 1 shows the molybdenum and rhenium contents of both solutions in the form of ReO 4 − and MoO 4 −2 By increasing the pH of the solution the rhenium
molybdenum pyrometallurgical processes  Potential hydrometallurgical processes for molybdenum and rhenium extraction are: a) leaching in the presence of oxidizing agents such as oxygen, ferric ions, nitric acid, concentrated sulfuric acid, chlorine water and sodium hypochlorite; b) pressure leaching at elevated pressures and
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