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US3739057A Process for the recovery of rhenium and

process for the recovery of molybdenum and rhenium from molybdenite which comprises: oxidizing the molybdenum in the molybdenite concentrate slurry to the hexavalent from with oxygen or oxygen-containing gases and less than a stoichiometric amount of nitric acid for the sulfide sulfur present, recovering molybdenum and rhenium values from the resulting solution when it contains up to 600 g./l

Investigation on the recovery of rhenium in the high

Aug 01, 2020 Fig. 1(a) shows the influence of reaction time on the recovery of rhenium from the acidic wash solution, and the experimental number 1–0 in Table 1 is the undegassed acidic wash solution originated from the flue gas washing process.. Download : Download high-res image (384KB) Download : Download full-size image Fig. 1.The effect of reaction time on the precipitation efficiency of metals

Recovery of rhenium from molybdenum and copper

May 01, 2014 The recovery of rhenium from the Mo and Cu ores has been estimated at 40–60% and significant opportunity exists to improve the efficiency of the process . A new technology known as Looping Sulfide Oxidation (LSO) has been proposed to process MoS 2 concentrates and Cu sulfide concentrates to MoO 2 and anode Cu, respectively [14],[15] .

Process of recovering rhenium values from complex

The precipitate formed in the process of this invention can be easily and efficiently separated from the solution resulting in a high recovery of the precipitated rhenium values. In fact, the process of the present invention results in essentially total recovery of the precipitated rhenium from the solution.

Review of technologies for rhenium recovery from mineral

Sep 01, 2011 Thorough recovery of rhenium from wash sulfuric acid into marketable product — ammonium perrhenate by this technology is 96.85%. Recovery according to the process stages is

Recovery of rhenium from molybdenite calcine by a resin-in

Aug 01, 2006 1. Introduction. The recovery of rhenium from molybdenite calcine has both important environmental and economic values. Rhenium is a less common metal with special properties and is widely used in the petrochemical industry, aviation, electron, medicine and metallurgy etc.

Recovery of Molybdenum and Rhenium Using Selective

process.3­6) The hydrometallurgical process for the produc-tion of rhenium from the related by-products can be divided into two major successive processes, which are leaching process and recovery process. In the leaching process, the dissolution of rhenium is fulfilled from the resources and for this purpose several methods are presently

Ruthenium recovery process by solvent extraction

Process for the recovery of the ruthenium present in an aqueous nitric solution, wherein the ruthenium is extracted in an organic solvent by contacting the nitric solution with an organic phase comprising an organophosphorous compound having at least one electron donor sulphur atom in the presence of a compound able to displace NO + ions of the ruthenium complexes present in the nitric solution.

(PDF) Separation and recovery of ruthenium: A review

of the recovery process reported by Naito et al. was similar. to the method developed for the recovery of noble metals. from HLLW by Jensen [49] at Pacific North West Lab, but.

The Process

The Process

Investigation on the recovery of rhenium in the high

Aug 01, 2020 Fig. 1(a) shows the influence of reaction time on the recovery of rhenium from the acidic wash solution, and the experimental number 1–0 in Table 1 is the undegassed acidic wash solution originated from the flue gas washing process.. Download : Download high-res image (384KB) Download : Download full-size image Fig. 1.The effect of reaction time on the precipitation efficiency of metals

Recovery of rhenium from molybdenum and copper

May 01, 2014 The recovery of rhenium from the Mo and Cu ores has been estimated at 40–60% and significant opportunity exists to improve the efficiency of the process . A new technology known as Looping Sulfide Oxidation (LSO) has been proposed to process MoS 2 concentrates and Cu sulfide concentrates to MoO 2 and anode Cu, respectively [14],[15] .

Recovery of rhenium from molybdenite calcine by a resin-in

Aug 01, 2006 1. Introduction. The recovery of rhenium from molybdenite calcine has both important environmental and economic values. Rhenium is a less common metal with special properties and is widely used in the petrochemical industry, aviation, electron, medicine and metallurgy etc.

Recovery of Rhenium and Molybdenum from Molybdenite

for Re recovery by precipitation methodology followed by decomposition and final product formed as crude NH 4ReO 4.4,5) Resin-in-pulp process established for Re separation from molybdenite calcine and they successfully leached 95% Re with selectivity of Mo.5) The chemical leaching of rhenium using different acids namely sulfuric

Recovery of Molybdenum and Rhenium Using Selective

process.3­6) The hydrometallurgical process for the produc-tion of rhenium from the related by-products can be divided into two major successive processes, which are leaching process and recovery process. In the leaching process, the dissolution of rhenium is fulfilled from the resources and for this purpose several methods are presently

Recovery of rhenium from copper leach solutions using ion

Nov 01, 2017 To verify the process of extracting rhenium in industrial application, three ion exchange columns packing with 105 L resins were operated to recover rhenium by direct ion exchange method. In the adsorption process, the recovery rate of rhenium reached 97.13% after approximately 960 BVs of leach solution flow.

Recovery of rhenium from copper leach solution by ion

Aug 01, 2012 Rhenium exchange on A170 a macroporous type resin was examined using concentrated solutions of H 2 SO 4, HCl, and HNO 3. There is current interest in recovery of rhenium from solutions produced during the leaching of low-grade copper resources. Large scale heap and stockpile leaching takes place at many copper operations throughout the world.

The improvement of rhenium recovery technology from W-Re

Dec 05, 2018 It is considered, that the fundamentals of an improved technology of rhenium recovery in the form of perrhenic acid from binary W-Re alloys. It is shown the desirability of avoiding the precipitation of metal in the form of potassium perrhenate. A basic technological scheme of the Re recovery process is

Extractive metallurgy of rhenium: a review SpringerLink

Feb 01, 2013 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,

(PDF) Extractive Metallurgy of Rhenium: A Review

Figure 5 —UTY SX/EW process flowsheet for rhenium recovery (Churchward and Rosenbaum, 1963). Figure 4 — Flowsheet for the recovery of rhenium from sulfuric acid scrubbing solution (Abisheva

Leaching kinetics, separation, and recovery of rhenium and

To optimise the leaching process the concentration of aqua-regia solution, leaching time, solid-to-liquid ratio, stirring speed, and sonication time have been investigated as experimental factors that can influence the recovery of rhenium from superalloy CMSX-4.

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 convert them to the

US20120058029A1 Rhenium recovery Google Patents

There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example super-alloys, which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably an aqueous mixture of hydrochloric acid and nitric acid, so as to form perrhenate species of at least

Development of the technology for the recovery of rhenium

Request PDF On Jan 1, 2010, A. Chmielarz and others published Development of the technology for the recovery of rhenium from polish copper smelters Find, read and cite all the research you

Recovery of Molybdenum and Rhenium Using Selective

process.3­6) The hydrometallurgical process for the produc-tion of rhenium from the related by-products can be divided into two major successive processes, which are leaching process and recovery process. In the leaching process, the dissolution of rhenium is fulfilled from the resources and for this purpose several methods are presently

The improvement of rhenium recovery technology from W-Re

Dec 05, 2018 It is considered, that the fundamentals of an improved technology of rhenium recovery in the form of perrhenic acid from binary W-Re alloys. It is shown the desirability of avoiding the precipitation of metal in the form of potassium perrhenate. A basic technological scheme of the Re recovery process is

Recovery of Rhenium and Molybdenum from Molybdenite

for Re recovery by precipitation methodology followed by decomposition and final product formed as crude NH 4ReO 4.4,5) Resin-in-pulp process established for Re separation from molybdenite calcine and they successfully leached 95% Re with selectivity of Mo.5) The chemical leaching of rhenium using different acids namely sulfuric

Enhancing PGM / rhenium returns from spent hydrocarbon and

There are many reasons for this, but the main reason concerns the inability to separate the remaining rhenium with a practical process for its recovery and subsequent refining. That’s because most precious metals refiners recover rhenium by dissolving their carriers (typically gamma aluminum oxide) with strong caustic or acidic chemicals (the

Leaching kinetics, separation, and recovery of rhenium and

To optimise the leaching process the concentration of aqua-regia solution, leaching time, solid-to-liquid ratio, stirring speed, and sonication time have been investigated as experimental factors that can influence the recovery of rhenium from superalloy CMSX-4.

Efficient, Environmentally-Compatible Recovery

Opportunities exist for enhancing rhenium yield through technological improvements in discrete steps in the recovery process. Due to rhenium"s excellent high temperature properties (high creep resistance, high melting point, etc.) it is widely used as an alloying agent for high temperature applications including: Pt-Re petroleum reforming

Extractive metallurgy of rhenium: a review SpringerLink

Feb 01, 2013 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,

(PDF) Extractive Metallurgy of Rhenium: A Review

Figure 5 —UTY SX/EW process flowsheet for rhenium recovery (Churchward and Rosenbaum, 1963). Figure 4 — Flowsheet for the recovery of rhenium from sulfuric acid scrubbing solution (Abisheva

Development of the technology for the recovery of rhenium

Request PDF On Jan 1, 2010, A. Chmielarz and others published Development of the technology for the recovery of rhenium from polish copper smelters Find, read and cite all the research you

Study of rhenium production process by hydrogen reduction

/ min. Rhenium deposition rate under these conditions is 0.013 mm / h and completeness of ReF. 6 . recovery is 25%. The coating has a columnar structure. X-ray studies showed that absence in it of any structure. In [6,7] the dependence of rhenium deposition rate on the content of rhenium

RHENIUM PROMETIA

Rhenium production is feasible because of the large ore tonnage processed, the presence of sufficient molybdenite to make its recovery economically practical, and the presence of specialized facilities that allow Rhenium recovery from molybdenite. USGS estimated the total global source of Rhenium at 12,500 Mg, which corresponds to more than two

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 into ferromolybdenum (FeMo).

Rhenium: a hidden asset DigitalRefining

There are many reasons for this, but the main reason concerns the inability to separate the remaining Re with a practical process for its recovery and subsequent refining. In fact, most precious metals catalyst refiners recover rhenium by dissolving their carriers (typically aluminium oxide) using strong caustic or acidic chemicals in a process

Rhenium Wikipedia

Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table.With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.Rhenium has the third-highest melting point and second-highest boiling point of any stable element at 5903 K