molybdenum rhenium leaching
molybdenum rhenium leaching
Zhengzhou, Henan China
24 hours At your service

molybdenum rhenium leaching

(PDF) Selective Recovery of Molybdenum over Rhenium from ...

Selective solvent extraction of molybdenum over rhenium from molybdenite (MoS2) flue dust leaching solution was studied. In the present work, thermodynamic calculations of the chemical equilibria ...

More

Recovery of Molybdenum and Rhenium Using Selective ...

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

More

Selective Recovery of Molybdenum over Rhenium from ...

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] (D.A.); [email protected] ...

More

(PDF) Leaching behavior of rhenium and molybdenum from ...

A study has been conducted for the separate recovery of molybdenum and rhenium from alkali leaching solution of molybdenite roasting dust by a selective precipitation method.

More

Recovery of Molybdenum and Rhenium Using Selective ...

Regarding NH 4 OH leaching solution, the optimal conditions for the formation of molybdenum precipitate were found to be 243.15 K, pH 2.5, 100 rpm of agitation speed, and 18,000 s of reaction time. The precipitation efficiency of molybdenum was higher than 99% in these conditions and molybdenum was observed to be precipitated as ammonium molybdate.

More

Silver-catalyzed bioleaching of copper, molybdenum and ...

Oct 01, 2015  Different pulp densities (3–9%) and initial pH values (1.5–1.9) 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.

More

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 (β Mo/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.

More

The solvent extraction separation of molybdenum and copper ...

Aug 01, 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 ...

More

molybdenum rhenium leaching - automa-varak

appropriate direction for the molybdenum leaching facility. Through a market analysis and preliminary evaluation of some of the options for expansion or elimination of the leach plant, this paper aims to provide direction for Teck Highland Valley Copper Partnership''s management regarding the leach plant. ... Rhenium Bioextraction while Uranium ...

More

Selective Recovery of Molybdenum over Rhenium from ...

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] (D.A.); [email protected] ...

More

Separation of rhenium and molybdenum from molybdenite ...

After removing rhenium, molybdenum was extracted with LIX984N. The selectivity of molybdenum extraction over other metals in solution was significant. Nearly 94% of molybdenum can be extracted from the solution at a pH value of -0.12, without any interference from other metal ions such as copper and iron ; Keywords:

More

Sustainable Extraction and Separation of Rhenium and ...

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 concentrates. Rhenium is solubilized during the pressure leaching

More

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 (β Mo/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.

More

MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM

MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM MOLYBDATE ... and the production of sulfuric acid can be found in the Rhenium and Selenium sections of this document. Pure molybdic oxide can be produced from technical grade molybdic oxide through sublimation and condensation or by leaching. In sublimation, the technical grade oxide is heated to ...

More

Review Molybdenum Recovery from Mineral Raw Materials

Molybdenum Recovery from Mineral Raw Materials by Hydrometallurgical Methods ... 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 ... Electrochemical leaching of copper-molybdenum-

More

US3751555A - Solvent extraction process for the recovery ...

US3751555A US00236838A US3751555DA US3751555A US 3751555 A US3751555 A US 3751555A US 00236838 A US00236838 A US 00236838A US 3751555D A US3751555D A US 3751555DA US 3751555 A US3751555 A US 3751555A Authority US United States Prior art keywords rhenium molybdenum acid recovery extractant Prior art date 1972-03-22 Legal status (The legal status is an

More

Development and Characterization of Robust and Cost ...

multiple runs due to the leaching of the active rhenium species. 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.

More

US4000244A - Wet-chemical digestion of molybdenum sulphide ...

The present invention relates to a special process for the recovery of molybdenum by the wet-chemical digestion of molybdenum sulphide containing materials by means of nitric acid. The invention relates especially to the combination of a leaching procedure (that provides a very pure molybdenum oxide) and a liquid extraction procedure for the recovery of molybdenum and other values from the ...

More

Separation of Vanadium and Tungsten from Sodium Molybdate ...

Solvent extraction experiments have been performed, to separate vanadium (V) and tungsten (W) from a synthetic solution containing macroamounts of molybdenum (Mo), in order to determine the effects of solution pH, extractant type and concentration, and stripping reagent. Only V was selectively extracted by 5,8-diethyl-7-hydroxydodecane-6-oxime (LIX 63) from the solution at the equilibrium pH 8 ...

More

Alexander Mining plc-First 'MoReLeach' Patent Granted

Sep 27, 2012  LONDON, UNITED KINGDOM-- - Alexander Mining plc - Alexander is pleased to report that it has received notification that its MetaLeach Limited subsidiary has been granted a patent for a Method Oxidative Leaching of Molybdenum - Rhenium Sulfide Ores and/or Concentrates in Australia, patent number 2011229125. ...

More

New Solid Oxo-Rhenium and Oxo-Molybdenum Catalysts for

molybdenum catalyst MoO x /TiO 2 was reported [19]. 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 species. The goal of this work was to test new strategies to immobilize rhenium and to explore the capability of other transition metals to catalyze ...

More

Freeport-McMoRan Sierrita Inc. - AZDEQ

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.

More

Separation of rhenium and molybdenum from molybdenite ...

After removing rhenium, molybdenum was extracted with LIX984N. The selectivity of molybdenum extraction over other metals in solution was significant. Nearly 94% of molybdenum can be extracted from the solution at a pH value of -0.12, without any interference from other metal ions such as copper and iron ; Keywords:

More

Sustainable Extraction and Separation of Rhenium and ...

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 concentrates. Rhenium is solubilized during the pressure leaching

More

RHENIUM AND MOLYBDENUM SEPARATION FROM SULFIDE

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 ...

More

JME

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 industries. It does not form its own minerals but

More

Development and Characterization of Robust and Cost ...

multiple runs due to the leaching of the active rhenium species. 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.

More

Patents Assigned to Metaleach Limited - Justia Patents Search

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;

More

Extractive metallurgy of rhenium: a review SpringerLink

A variety of processing technologies exist for recovery from both primary and secondary sources of rhenium. Currently, there are no known primary rhenium deposits; thus, the method in which primary rhenium is produced is dependent on the commodity of which it is a byproduct, e.g., copper, molybdenum, uranium, etc. In addition, focus on the recovery of rhenium from secondary sources,

More

Separation of Vanadium and Tungsten from Sodium Molybdate ...

Solvent extraction experiments have been performed, to separate vanadium (V) and tungsten (W) from a synthetic solution containing macroamounts of molybdenum (Mo), in order to determine the effects of solution pH, extractant type and concentration, and stripping reagent. Only V was selectively extracted by 5,8-diethyl-7-hydroxydodecane-6-oxime (LIX 63) from the solution at the equilibrium pH 8 ...

More

Freeport-McMoRan Sierrita Inc. - AZDEQ

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.

More

Metals and HydrometallurgyIon Exchange Resin and ...

Recovery of rhenium and molybdenum from sulfuric acid solution which produces molybdenum and copper: PM604: Separation of rhenium from molybdenum: PM401: Convert sodium tungstate to ammonium tungstate: PM403: Molybdenum extraction resin:

More

INTERNATIONAL SYMPOSIUM ON RHENIUM AND RHENIUM

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.

More

Process for recovery of molybdenum and rhenium from ores ...

Subsequent oxidation converts remaining molybdenum, rhenium and sulfur values to water soluble form. After oxidation and leaching with water under preferred conditions as disclosed herein, the resulting water solution contains dissolved therein greater than 98 percent of the rhenium, molybdenum and sulfur originally in the ore.

More

Breakthrough curves for adsorption and elution of rhenium ...

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

More