Background

rhenium recovery molybdenum

RECOVERY OF RHENIUM AND MOLYBDENUM VALUES FROM …

An improvement in the recovery of molybdenum and rhenium values by roasting molybdenite which comprises preheating finely divided molybdenite concentrate and passing it downwardly through a vertically oriented reaction zone countercurrent to an upwardly traveling stream of high temperature oxygen, oxygen enriched air or oxygen-sulfur dioxide mixture heated by its …

Global Rhenium and Molybdenum Market Insights, Forecast to ...

Global Rhenium and Molybdenum market size will increase to xx Million US$ by 2025, from xx Million US$ in 2018, at a CAGR of xx% during the forecast period. In this study, 2018 has been considered as the base year and 2019 to 2025 as the forecast period to estimate the market size for Rhenium and Molybdenum.

Rhenium - USGS

Based on 80% recovery of estimated rhenium contained in molybdenum disulfide concentrates. Secondary rhenium production is not included. 2. Does not include wrought forms or waste and scrap. The rhenium content of ammonium perrhenate is 69.42%. 3. Defined as production + imports – exports. 4

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 in aqueous solution were first performed, and the potential–pH diagram for the Mo–Re–SO42−–H2O system was constructed.

On the uptake of rhenium by plants: Accumulation and ...

On the uptake of rhenium by plants: Accumulation and recovery from plant tissue Author: Christina Tzvetkova, Luís A.B. Novo, Stela Atanasova-Vladimirova, Tsvetan Vassilev Source: Journal of cleaner production 2021 v.328 pp. 129534 ISSN: 0959-6526 Subject: Acacia, Trifolium repens, absorption, alfalfa, grasses, leaves, petroleum, plant tissues,

Efficient, Environmentally-Compatible Recovery ...

DESCRIPTION: Due to the limited amount of rhenium present in the earth"s crust (approximately 1-2 part per billion) there is a significant benefit to be realized in recovering for reuse the rhenium from scrap material, spent catalysts, or end-of-life superalloys. Rhenium is found in molybdenum-copper porphyry deposits.

Separation of rhenium and molybdenum from molybdenite ...

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 …

INTERNATIONAL SYMPOSIUM ON RHENIUM AND RHENIUM …

This report submits data of high-efficiency methods for rhenium recovery from secondary raw materials of various types, such as exhausted platinum-rhenium catalysts and scrap of rhenium-containing molybdenum, tungsten and nickel based alloys. Developed methods are used on a commercial level at industrial enterprises of Russia and CIS.

Recovery of Rhenium from Superalloy Scrap | SBIR.gov

Very little rhenium is actually processed and isolated each year as compared to the millions of tons of copper and millions of pounds of molybdenum that are extracted from the same copper deposits. Opportunities exist for enhancing rhenium yield through technological improvements in discrete steps in the recovery process.

Molybdenum-Rhenium - Leading Edge Metals and Alloys | LEMA

Overview. The addition of rhenium to molybdenum improves plasticity and weldability and decreases brittleness for certain temperature ranges. It is used throughout the aerospace and electronics industries for applications such as nuclear reactors, semiconductors, electrical contacts, filaments and igniter wires.

How to Separate & Recover Molybdenum & Rhenium

Molybdenum and rhenium were recovered quantitatively from Elox process solution by solvent extraction. Rhenium and molybdenum were separated by selective adsorption of rhenium onto activated carbon. The rhenium was subsequently stripped from the carbon with a MeOH-H2O mixture.

(PDF) Extractive Metallurgy of Rhenium: A Review

In addition, focus on the recovery of rhenium from secondary sources, such as alloy scraps and catalysts, is continually growing. ... (containing Rhenium heptasulfide Re 2 S 7, …

Re-assessing the surface cycling of molybdenum and …

Re-assessing the surface cycling of molybdenum and rhenium Christian A. Millera,b,⇑, Bernhard Peucker-Ehrenbrinka, Brett D. Walkera,c, Franco Marcantoniod aDept. of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, 360 Woods Hole Road, Woods Hole, MA 02543, USA bDept. of Earth, Atmospheric and Planetary Sciences, …

Rhenium (Advance Release)

Codelco and Glencore plc also roasted byproduct molybdenum concentrates in Chile, but those roasters were not equipped for rhenium recovery (Molibdenos y Metales S.A., 2018, p. 175, 213). Codelco continued to operate its molybdenum processing plant, Molyb, which had the ability to recover rhenium (Corporación Nacional del Cobre de Chile ...

Separation of rhenium and molybdenum from ... - Sharif

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.

Recovery of Molybdenum and Rhenium Using Selective ...

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. Two kinds of ...

Molybdenum-Rhenium Implantable Medical Devices

molybdenum 47.5% rhenium medical devices •An overview of the powder metallurgy processing methods for molybdenum 47.5% rhenium rods and sheet manufacturing •An examination of mechanical properties at room temperature of molybdenum 47.5% rhenium rod and sheet •Review of the microstructures and fractography of the molybdenum 47.5% rhenium ...

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; …

Molybdenum Rhenium Alloy | MoRe Plates, Sheets, Rods, Bars ...

Molybdenum rhenium tubes are manufactured in a standard alloy of 47.5% rhenium, and 52.5% of molybdenum. It is preferred for many nuclear and aerospace critical applications, advanced electronics, new solar thermal management technologies, and …

Recovery and Separation of Molybdenum and Rhenium from a ...

Recovery and separation of molybdenum and rhenium from a process solution was accomplished by a technique developed by the Federal Bureau of Mines involving a combined solvent extraction and activated carbon adsorption procedure. The processing sequence required treatment of the solution with SO2 to reduce the chlorate ion and adjust the pH prior to solvent …

MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM …

Molybdenum metal is a refractory metal used as an alloying agent in steels, cast irons, and superalloys.3 ... Rhenium Recovery Scrubber Roasting Leaching Wastewater Gas Wastewater Technical Grade Molybdic Oxide Sublimation Leaching Acid …

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

Rhenium Recovery. Some molybdenite concentrates, a by-product from copper ore, contain small amounts of rhenium (< 0.10%). 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

Recovery of rhenium - Universal Oil Products Company

Rhenium is recovered in a substantially pure form from a hydrochloric acid solution thereof contaminated with molybdenum and iron by adding sulfuric acid to establish a sulfate/chloride anion ratio of at least 20:1 and mixing the solution with a liquid trialkyl phosphate to extract rhenium in the phosphate phase.

Selectivity recovery of molybdenum(VI) from rhenium(VII ...

Amine functional group was grafted to obtain modified persimmon waste gel (NH2–CPT) with the focus of development of selective recovery of molybdenum from rhenium. The adsorption behavior of the NH2–CPT gel for various metal ions at varying hydrochloric acid concentrations was studied. It is found that the NH2–CPT exhibits high affinity for Mo(VI) and …

Highly enhanced selectivity for the separation of rhenium ...

So the recovery of rhenium and molybdenum is of great economic significance because of their higher use value. Rhenium occurs in molybdenum disulfide (molybdenite) ores, and it is obtained as a by-product of molybdenum refinement. The similar chemical behaviors and properties of rhenium and molybdenum make the separation quite difficult .

Sustainable Extraction and Separation of Rhenium and ...

Chile is one the largest global producers of copper, rhenium, and molybdenum.5 Rhenium is present in low concentrations in the Earth's crust (0.4 mg.t−1)2 and is primarily produced as a byproduct of molybdenum and copper extraction at great environmental costs.6 Rhenium is recovered during the pyrometallurgical processing of molybdenum ...

Recovery of Molybdenum and Rhenium Using Selective ...

recovery of rhenium and molybdenum. 2. Experimental 2.1 Materials A synthetic alkali leaching solution was employed in the experiment to maintain the consistency of study. The leaching solution was prepared by adding desired amounts of rhenium powder (>99.9%, Aldrich), sodium molybdate (>99.0%, Samchun), calcium chloride (>99.0%, Junsei),

Industrial Application of Rhenium Comprehensive Recovery ...

The efficient recovery of rhenium had always been a research hotspot. Combined with the related research results of Jinduicheng Molybdenum Company, the differences in technological process, index and technological features of strong basicity resin process and weak basicity resin process are compared and analyzed in this article. At present the direct ion …

Recovery of Molybdenum & Rhenium From Molybdenite …

Rhenium heptoxide can be recovered in venturi scrubbers from scrub liquor of fumes and dust from roasting molybdenite concentrate ( Habashi, 1997 ). The scrubbing solution is acidic-based and contains high amounts of sulfate ion, …

US4321089A - Process for the recovery of molybdenum and ...

A process for the recovery of molybdenum and rhenium from their sulfide ores which comprises subjecting the ores to microwave energy in the presence of oxygen to selectively heat the sulfides to convert them to oxides, and recovering the formed oxides. Alternatively, the sulfides in the ore are selectively heated with microwave energy in the presence of chlorine to …

Recovery of molybdenum and rhenium in scrub liquors of ...

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 99.8% Mo extraction in a two-stage solvent extraction at pH = 1 and O/A = 1.

Theoretical Prediction of Rhenium Separation from Ammonium ...

The main objective of the present study is to sep. the rhenium and molybdenum as well as recovery of the targeted metal ion. The behavior of extn., stripping and sepn. possibilities of rhenium and molybdenum from molybdenite roasting dust leaching solns. using tri-octyl-amine (TOA) as an extractant has been investigated.

FDA clears first molybdenum rhenium pedicle screw - …

FDA clears first molybdenum rhenium pedicle screw. The FDA today cleared Mirus 's Europea pedicle screw system, which is composed of its MoRe proprietary molybdenum rhenium superalloy, making it ...

Recovery of Molybdenum and Rhenium Using Selective ...

The precipitation efficiency of molybdenum was higher than 99% in these conditions and molybdenum was observed to be precipitated as ammonium molybdate. Contrary to the precipitating behavior of molybdenum, rhenium was precipitated very little in the given conditions, which suggested a possibility for the selective recovery of molybdenum and ...