A novel adsorbent was prepared by NH4HCO3-modifying nanoalumina dioxide and was employed for theseparation/preconcentration of ReVII ions from aqueous solution. It was found that ReVII ions could be adsorbed quantitatively (above 94%) on modified nano-Al2O3 in the pH range of 2.0–3.0, while only 8.3% of ReVII ions were adsorbed on unmodified nano-Al2O3.

This way, as in the solvent extraction processing of molybdenum andrheniumusing amine-type anionic extractants, theirseparationis brought about during thestrippingstage. When using these adsorbents, theseparationof both metals from leaching solutions should be achieved by recovering the contents of Mo(VI) in a first step followed of a second stage in which Re(VII) would be extracted.

Rheniumandmolybdenumare recovered from acidic solutions using an adsorption process. Adsorbents are based onmagnetic nanoparticlesfunctionalized with amine groups. The adsorbent compounds were synthesized and chemically and physically characterized.

Aseparationof the individual contributions to the measured susceptibility is made and the resultant values are compared with data on cubic sodium tungsten bronzes. The agreement indicates strong similarities between the properties ofReO 3and Na x WO 3 as x approaches 1.

Magnetic absorbentsare expected to have a high capacity as well as a simpleseparation absorptionprocess. In this research, according to the findings of ICP analysis,Rheniumis absorbed up to 82%. Recommended articles Citing articles (0)

However,rheniumhas no mineable ore naturally and invariably exists in rocks, pegmatites, and especially in molybdenites . It is especially difficult toseparate rheniumfrom molybdenum in an actual aqueous solution because of their similar ionic radius and anion species (mainly MoO 4 2− and ReO 4 −) , . Recovery andseparationofrheniumfrom molybdenite or industrial wastewater has become an urgent …

In this work, a novel di-2-ethylhexylamine modifiedmagnetic chitosan(FCS-DIOA) was successfully synthesized and used to recovery Re(VII) in Mo–Re binary mixtures. The percentage content and the chemical structure of adsorbent were characterized by elemental analysis, gassorption,magneticproperties, X-ray diffraction analysis, infrared spectroscopy, and Boehm titration, respectively.

Themagneticcharacteristics of the particle affect the force applied on it by a factor ranging from zero to approximately 0.5. Themagneticforce applied on a particle is a direct function of the cube of its radius. Hence, the great importance of the size of particles In wetmagnetic separation. The force is a direct function of both H and dH/dx.

Rhenium is a unique, valuable and extremely rare chemical element currently used as an alloying element in high-temperature superalloys for aerospace and industrial gas-fired turbines and also as ...

Magnetic liquid separation is based on the appearance in FML of a ponderomotive force of a nonuniform magnetic liquid additional to the gravity buoyancy force.

There are many methods ofseparation(concentration) of minerals: 1) Gravityseparation. There are more than 12 types of gravityseparationof minerals. It is used for the extraction of gold, coal, cassiterite, wolframite, rare earth mineral, niobium, zirconium, uranium minerals, and others. Read more . 2)Magnetic separation. There are more than 14 types ofmagnetic separationof minerals.

Vale to build $100-million dry magnetic separation plant in Brazil Vale plans to invest up to $100 million to build an industrial plant for dry magnetic concentration of low-grade iron ore, as it has been trying to reduce the use of tailings dams, the Brazil-based miner said on Thursday February 6.

Separationin ferromagnetic liquid (FML) is recommended for separating gold from concentration products of placers.Magneticliquidseparationis based on the appearance in FML of a ponderomotive force of a nonuniformmagneticliquid additional to the gravity buoyancy force. A horizontal component of this force in theseparationmedium bulk participates in the body motion along the ...

Highly enhanced selectivity for theseparationofrheniumand molybdenum using amino-functionalizedmagneticCu-ferrites. Journal of Materials Science 2015, 50, …

Determination ofrheniumin molybdenum and tungsten by neutron activation. Analytical Chemistry 1975, 47 (11) , 1847-1849. DOI: 10.1021/ac60361a022. Charles L. Wilkins and Thomas L. Isenhour. Multiple discriminant function analysis of carbon-13 nuclearmagneticresonance spectra.

Materials. Melt-Spinning; HD-Autoclave; Electroslag Remelting (ESR), Vacuum Arc Remelting (VAR)

Rheniumhas good wear resistance and high melting point.Rheniumnanoparticle suspensions can be coated onto a surface and dried at low temperatures to obtain a gas-tight coating. Chemical Properties. The chemical properties ofrheniumnanoparticles are outlined in the following table.

An effective method based onmagneticsolid-phase extraction for the selective recovery ofrheniumand molybdenum has been developed using diethylamine-functionalizedmagneticCuFe2O4 ([email protected] ...

Rheniumis mainly obtained as a by-product of the extraction and refinement of molybdenum and copper ores. The main source ofrheniumis molybdenum concentrates (rheniumcontent 0.01-0.04%; 2 …

A GroupSeparationMethod for Ruthenium, Palladium,Rhenium, Osmium, Iridium, and Platinum Using Their Bromo Complexes and an Anion Exchange Resin. Analytical Chemistry 2001, 73 (21) , 5240-5246. DOI: 10.1021/ac010615u. Steven B. Shirey and Richard J. Walker. Carius Tube Digestion for Low-BlankRhenium-Osmium Analysis.

WHIM is the short acronym for WetHigh Intensity Magnetic Separation.. At present, most U.S. iron raw materials are produced frommagnetictaconites, which are ground to a nominal minus 270 mesh (53 micrometers), beneficiated by wet low-intensity magnetic separation, and pelletized.

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Mountain Pass rare earth mine (USA) They use flotation.; Bayan Obo REE−Fe−Nb Ore Deposit (China) They use flotation.; Nolans Bore Deposit (Australia); Van Rhynsdorp and Naboomspruit (South Africa) Other major monazite sources are heavy mineral sands from so-called placerdeposits which are usually mined by dredging or scraping, followed by screening and concentration in spiral concentrators.

Preparation and radiolabelingof surface-modified magnetic nanoparticles with rhenium-188 formagnetictargeted radiotherapy June 2004 Journal of Magnetism andMagnetic…