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molybdenum rhenium extraction

Separation of molybdenum and rhenium by extraction with ...

1979-01-01  After 6 contacts, the rhenium content of the organic phase was 0.008 g/l and the nitric acid strip solution contained 7.13 g/1 Re and 0.15 g/1 Mo. Mechanism of extraction The composition of the extracted molybdenum complex was studied by the method of saturation of the Aliquat 336 extractant. The molar ratio of Mo to Aliquat 336 was 3:1. It is known [8] that molybdenum exists as the polymeric ...

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Solvent extraction of rhenium from molybdenum in alkaline ...

The technology of selective extraction of rhenium from alkaline solutions containing rhenium and molybdenum by solvent extraction using a mixture of tributyl phosphate and triotylamine as extractant has been investigated, complete separation of rhenium from alkaline solutions containing rhenium and molybdenum was possible after repeated extraction and repeated stripping.

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Separation of rhenium from molybdenum and other heavy ...

1971-05-01  Two methods are presented for the extractive separation of rhenium from molybdenum and other heavy metals in hydrochloric acid solution. In the first method, Mo(VI) and Re(VII) are reduced by hydrazine in strong hydrochloric acid solution to Mo(V) and Re(IV). The former is then extracted intoiso-amyl acetate. The Re(IV) remaining in the aqueous phase is oxidised to Re(VII) and

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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

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Separation of rhenium from molybdenum and vanadium by ...

1966-09-01  A method is described for the separation of rhenium from molybdenum and vanadium by extraction with amyl alcohol. The sample solution containing Re VII, Mo VI, and V V is boiled with hydrazine sulphate in order to obtain Mo V and V IV (Re remains in the heptavalent state). Rhenium is quantitatively extracted into amyl alcohol from this solution, along with very slight amounts of molybdenum

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Electrolytic Extraction of Copper, Molybdenum and Rhenium ...

2017-07-20  Molybdenum and rhenium are critical elements with low earth-abundance and are mainly obtained as by-products of copper sulfide ores mining,. Over 90% of the world's primary copper in the earth crust is present in the form of sulfide minerals, such as chalcocite (Cu2S), chalcopyrite (CuFeS2), and bornite (Cu 5 FeS 4).

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(PDF) Extractive Metallurgy of Rhenium: A Review

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,...

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Rhenium Price, Occurrence, Extraction, Applications ...

The basic material for the extraction of rhenium are molybdenum ores, especially molybdenum luster. If these are roasted in the course of molybdenum extraction, rhenium accumulates as volatile rhenium (VII) oxide in the fly ash. This can be converted into ammonium perrhenate (NH 4

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Determination of rhenium content in molybdenite by ICP-MS ...

A simple and rapid analytical method for determining the concentration of rhenium in molybdenite for Re-Os dating was developed. The method used isotope dilution-inductively coupled plasma-mass spectrometry (ID-ICP-MS) after the removal of major matrix elements (e.g., Mo, Fe, and W) from Re by solvent extraction with N-benzoyl-N-phenylhydroxylamine (BPHA) in chloroform solution.

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Selective Recovery of Molybdenum over Rhenium from ...

Keywords: rhenium; molybdenum; solvent extraction; separation; hydrometallurgy 1. Introduction Molybdenum (Mo) is a strategic metal that has an extensive demand in di erent branches of the industry. Rhenium (Re) is also a strategic metal, although less common with wide applications in the oil industry (e.g., production of reforming catalyst) and in heat-resistant alloys (e.g., aerospace ...

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Separation of rhenium from molybdenum and other heavy ...

Two methods are presented for the extractive separation of rhenium from molybdenum and other heavy metals in hydrochloric acid solution. In the first method, Mo(VI) and Re(VII) are reduced by hydrazine in strong hydrochloric acid solution to Mo(V) and Re(IV). The former is then extracted intoiso-amyl acetate. The Re(IV) remaining in the aqueous phase is oxidised to Re(VII) and determined by ...

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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

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Separation of rhenium from molybdenum and vanadium by ...

A method is described for the separation of rhenium from molybdenum and vanadium by extraction with amyl alcohol. The sample solution containing Re VII, Mo VI, and V V is boiled with hydrazine sulphate in order to obtain Mo V and V IV (Re remains in the heptavalent state). Rhenium is quantitatively extracted into amyl alcohol from this solution, along with very slight amounts of molybdenum

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(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 ...

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Sustainable Extraction and Separation of Rhenium and ...

Rhenium is solubilized during the pressure leaching step and can be subsequently recovered by a series of solution concentration and purification steps including ion exchange, solvent extraction, and electrodialysis to obtain pure ammonium perrhenate crystals or rhenium metal.5In this context, there is a growing need for sustainable mining operations which alleviate the environmental burden while

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(PDF) Extractive Metallurgy of Rhenium: A Review

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,...

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Overview Of The Refractory Metal Rhenium

The content of rhenium in molybdenum concentrate is generally between one-hundred-thousandth and three-hundred-thousandth, ... Rhenium has such an important strategic significance, in addition to its difficulty in mining and extraction, the more essential reason is its excellent characteristics. These characteristics of rhenium metal or rhenium compounds can be called “Rhenium Effect”. Let ...

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Rhenium - Wikipedia

Commercial rhenium is extracted from molybdenum roaster-flue gas obtained from copper-sulfide ores. Some molybdenum ores contain 0.001% to 0.2% rhenium.

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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

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Selective Recovery of Molybdenum over Rhenium from ...

Keywords: rhenium; molybdenum; solvent extraction; separation; hydrometallurgy 1. Introduction Molybdenum (Mo) is a strategic metal that has an extensive demand in di erent branches of the industry. Rhenium (Re) is also a strategic metal, although less common with wide applications in the oil industry (e.g., production of reforming catalyst) and in heat-resistant alloys (e.g., aerospace ...

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Separation of rhenium from molybdenum and vanadium by ...

A method is described for the separation of rhenium from molybdenum and vanadium by extraction with amyl alcohol. The sample solution containing Re VII, Mo VI, and V V is boiled with hydrazine sulphate in order to obtain Mo V and V IV (Re remains in the heptavalent state). Rhenium is quantitatively extracted into amyl alcohol from this solution, along with very slight amounts of molybdenum

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Sustainable Extraction and Separation of Rhenium and ...

Rhenium is solubilized during the pressure leaching step and can be subsequently recovered by a series of solution concentration and purification steps including ion exchange, solvent extraction, and electrodialysis to obtain pure ammonium perrhenate crystals or rhenium metal.5In this context, there is a growing need for sustainable mining operations which alleviate the environmental burden while

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Behavior of Extraction, Stripping, and Separation ...

Keywords: rhenium, molybdenum, extraction, stripping, separation, tri-otyl-amine (TOA) 1. Introduction Rhenium is a less common metal with special properties and it is widely being used in several industrial processes such as petrochemical industry, aviation, electronics, medi-cine and metallurgy. Because of high costing value of rhenium while compared to molybdenum, the recovery of rhenium ...

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Overview Of The Refractory Metal Rhenium

The content of rhenium in molybdenum concentrate is generally between one-hundred-thousandth and three-hundred-thousandth, ... Rhenium has such an important strategic significance, in addition to its difficulty in mining and extraction, the more essential reason is its excellent characteristics. These characteristics of rhenium metal or rhenium compounds can be called “Rhenium Effect”. Let ...

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How is Molybdenum Extracted - SAMaterials

The main ore dressing method of molybdenum ore is flotation The molybdenum mineral recovered by flotation is molybdenite. The flotation agent uses non-polar oils

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Electrolytic Extraction of Copper, Molybdenum and Rhenium ...

The validity of the electrochemical series for metal sulfides decomposition in their standard state has been tested experimentally at 1500 K for La 2 S 3 , Cu 2 S, MoS 2 ,

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6 Interesting Facts About Rhenium Refractory Metals and ...

The extraction metallurgical process of rhenium mainly includes the steps of preparing rhenium-containing raw materials, separating rhenium and molybdenum, preparing rhenium intermediate compounds, preparing rough rhenium powder, and refining and densification of rhenium. Interesting Facts About Rhenium – 5. The Uses of Rhenium

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Recent advances of rhenium separation and enrichment in ...

Next, rhenium is extracted from water where molybdenum roaster-flue gas is absorbed (Eq. (2)). Finally, the perrhenic acid (HReO 4) or aqueous rhenium is recovered through solvent extraction or ion-exchange processes giving the end precursor product as ammonium

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Separation studies of molybdenum(VI) and rhenium(VII ...

The extraction of molybdenum is quantitative from 2.54-3.10 M hydrochloric acid and from 3.76-3.98 M hydrobromic acid, and that of rhenium is from 6.78-7.91 M hydrochloric acid. The probable nature of the extractable species is established using log distribution ratio-log concentration plots. The method permits mutual separation of molybdenum(VI) and rhenium(VII) and is applicable for the ...

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Selective Recovery of Molybdenum over Rhenium from ...

Selective extraction of rhenium over molybdenum from alkaline solutions has also been studied by employing an organic phase composed of 20% N235 and 30% TBP diluted in kerosene. An organic phase composed of 5 vol% N235 (in kerosene) was found to selectively recover Re over Mo at equilibrium pH 0.0.

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Behavior of Extraction, Stripping, and Separation ...

Keywords: rhenium, molybdenum, extraction, stripping, separation, tri-otyl-amine (TOA) 1. Introduction Rhenium is a less common metal with special properties and it is widely being used in several industrial processes such as petrochemical industry, aviation, electronics, medi-cine and metallurgy. Because of high costing value of rhenium while compared to molybdenum, the recovery of rhenium ...

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Liquid extraction of rhenium(VII) and molybdenum(VI) with ...

The liquid extraction of rhenium(VII) and molybdenum(VI) ions from sulfuric, hydrochloric, and nitric acid media is studied in the temperature range from 20 to 40°C using trialkylphosphine oxide in kerosene as an extracting agent. The maximum separation of these metals is attained when they are extracted from solutions of 1.0–2.0 M H2SO4 (the duration of intense phase mixing was 3–5 min).

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Method of extracting rhenium from molybdenum-containing ...

There is a method of extraction of rhenium from leaching sulfuric acid systems wet n is neulavlivaemy molybdenum production by joint extraction of rhenium and molybdenum solution technical mixture of the tertiary amine in kerosene with the addition oktilovom alcohol, Stripping rhenium and molybdenum aqueous solution of ammonia, the deposition of the main quantities of molybdenum from reextract ...

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Substituted ethan phosphonic acid esters as reagents for ...

New esters of the ethan phosphonic acids have been synthesized and their extraction properties studied with respect to Mo(VI), Re(VII), Fe(III),Au(III),Tl(III) and Sb(V). A possibility is shown for the analytical separation of molybdenum from rhenium (beta = 700). The state of these new extraction agents in carbon tetrachloride solution, and the mechanism of the extraction processes, have been ...

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Separation of rhenium from molybdenum and vanadium by ...

SummaryA method is described for the separation of rhenium from molybdenum and vanadium by extraction with amyl alcohol. The sample solution containing ReVII, MoVI, and VV is boiled with hydrazine sulphate in order to obtain MoV and VIV (Re remains in the heptavalent state). Rhenium is quantitatively extracted into amyl alcohol from this solution, along with very slight amounts of molybdenum ...

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6 Interesting Facts About Rhenium Refractory Metals and ...

The extraction metallurgical process of rhenium mainly includes the steps of preparing rhenium-containing raw materials, separating rhenium and molybdenum, preparing rhenium intermediate compounds, preparing rough rhenium powder, and refining and densification of rhenium. Interesting Facts About Rhenium – 5. The Uses of Rhenium

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Rhenium - Element information, properties and uses ...

Rhenium is among the rarest metals on Earth. It does not occur uncombined in nature or as a compound in a mineable mineral species. It is, however, widely spread throughout the Earth’s crust to the extent of about 0.001 parts per million. Commercial production of rhenium is by extraction from the flue dusts of molybdenum smelters.

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Recent advances of rhenium separation and enrichment in ...

Next, rhenium is extracted from water where molybdenum roaster-flue gas is absorbed (Eq. (2)). Finally, the perrhenic acid (HReO 4) or aqueous rhenium is recovered through solvent extraction or ion-exchange processes giving the end precursor product as ammonium

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