The concentration of rhenium in the fumarole is only 2–10 ppb, so the condensation of pure rhenium sulfide from this gas requires both enrichment of rhenium by eight orders of magnitude and remarkable selectivity. ... b.p. 362 °C, ρ 6.14 g cm –3), is the raw material for all rhenium compounds, being the volatile fraction obtained upon ...

It is important to recognize that, in general, the minor alloying elements are not mined for themselves (rhenium, for example), but rather as low-concentration "companions" in the ores of ...

To solve this problem, rhenium may be recovered either from raw materials (solutions from processing of copper and copper-molybdenum concentrates) with improved separation/enrichment technologies, ... Also, at different acid concentrations, rhenium could be separated from molybdenum (pH 6–10) or co-extracted with molybdenum (pH 1).

Concentration of rhenium and other rare metals in gases of the Kudryavy Volcano (Iturup Island, Kurile Islands) Geochemistry; Published: 03 February 2010; Volume 430, pages 114–119, (2010) Cite this article

leaching of rhenium from the ash; ii) ethanol extraction of rhenium from raw leaves followed by evaporation of ethanol, ashing of dry residue and alkaline extraction of rhenium from the ash. ... (as compared to its initial concentration in soils) using ethanol extraction from green plant mass in the remaining ash. A better (in comparison with ...

The raw material for rhenium recovery used in this paper is the raw liquid of leaching solution of molybdenum concentrate processing roasting in a smelter in …

A method of obtaining a concentrate containing 53–67% osmium from raw lead with an initial content of 0.0025–0.0050% in the slurry and a concentration number of 13,000–21,000 times has been ...

In this article, a review of the methods and technologies for obtaining rhenium from industrial waste and secondary raw materials, technologies for obtaining rhenium at …

Rhenium Raw Material As a world leader in the manufacture of rhenium products, Ultramet understands the need for high quality raw material that offers lot-to-lot consistency and reliability. Consequently, Ultramet has developed its own in-house processing system to provide rhenium powder and pellets that meet the following criteria: Purity >99. ...

Ammonium perrhenate is a raw product for further metallic rhenium production. ... The rhenium concentration in mother liquors after precipitation of the nickel-cobalt concentrate is determined by ...

Among promising raw materials for obtaining rhenium are lead sludges and dust having a rhenium content varying from 80 to 1000 g/t. Various methods for processing such materials provide for the extraction of viable concentrations of rhenium in productive solutions, solid processing products, and sublimates [3,4,5,6,7,8,9,10,11].Concerning …

where Q e is the equilibrium adsorption capacity of rhenium (mg·g −1), C 0 is the initial concentration of rhenium measured in rhenium stock solution (mg·L −1), C e is the equilibrium concentration of rhenium measured in effluent (mg·L −1), V is the volume of rhenium solution (L) and W is the amount of resins (g).. 2.3.1 Resins …

The determination of rhenium in mineral raw materials or different products by solution techniques requires dissolution of the samples. The digestion can be …

The results presented in [18] were obtained for quite narrow temperature and rhenium concentration ranges in the solution at one NH 4 OH concentration (150 g/L). Moreover, we failed to find any ...

Three types of deposits where rhenium presented were identified in Kazakhstan:. •Copper-molybdenum deposits with high rhenium concentrations in molybdenite (300 to 3000 g/t), •Rhenium containing cupriferous sandstones (concentration of rhenium 1-3 g/t). The main rhenium mineral in this ore is zhezkazganite (CuReS4).

Lead sludge from copper production is a source of rare metals, such as rhenium and osmium, whose content reaches 0.06–0.08% and 0.0025–0.0050%, respectively. The base of the sludge consists of lead sulfate. A method of reductive smelting of lead sludge from copper smelting production at 1000–1100 °C has been developed. Coke was used as a …

Recovery of Rhenium from Mineral Raw Materials of Kazakhstan Z S Abisheva, A N Zagorodnyaya and N S Bekturganov Reference Number: 102 ... products because of the low concentration. Therefore ...

@misc{etde_690991, title = {Products of volcanic activity raw materials for production of rhenium and other metals; Produkty vulkanicheskoj deyatel`nosti - syr`e dlya proizvodstva reniya i drugikh metallov} author = {Tarasov, A V, Besser, A D, Gedgatov, Eh I, Shtejnberg, G S, and Shaderman, F I} abstractNote = {The results of specialized geochemical, …

for the subsequent production of commercial salts of rhenium by the known hydrometallurgical methods. The content of rhenium in the slag phase is 0.18–0.25%, with its initial content in the slime of 0.06–0.08%. The degree of rhenium concentration at the first stage of processing is 3–3.2 times in the form of water-soluble perrhenate.

We compile a global database of rhenium deposits, and estimate global resources. • We estimate approx. 83 kt Re contained within 618 Cu & Mo deposits. • …

When the pH of the rhenium–molybdenum solutions (initial concentration 10.4 mM for each metal) was in the range from 6.3 to 12.5 and the irradiation time was 6 h, the rhenium in the initial solutions was efficiently recovered in the precipitates (92–99%), and the rhenium selectivity was high (the rhenium recovery ratio was 9.2–21 times ...

The reference solutions for the determination of the rhenium by using the sintering method was prepared on the basis of a blank sample, containing 1080 μg ml − 1 (final volume 25 ml) or 540 μg ml − 1 (final volume 50 ml) and the acids used for digestion. Rhenium in appropriate concentrations was added from ICP standard solution.

Lead slime contains up to 800 g/t of rhenium and 50 g/t of osmium and is regarded as a promising raw material for rare metals. The basis of lead sludge is lead …

Rhenium is primarily produced as a by-product in molybdenum, copper, lead and uranium production from the concentrates and ores. Rhenium is extracted from roasting fume and dust, leaching residue, and aqueous solution to produce a rhenium …

Degree of rhenium preconcentration in ash The results in Table 1 show that on incineration of 1 g raw leaves of green geranium, the concentration of rhenium has increased from 110 μg/g raw leaves up 254 Proceedings of the WSEAS Int. Conf. on Waste Management, Water Pollution, Air Pollution, Indoor Climate, Arcachon, France, October 14-16, 2007 ...

The leaching rates of rhenium and molybdenum were 93.2% and 95.3%, respectively, when the concentration of hydrogen peroxide was 10%, leaching temperature was 70℃, leaching time was 2 h and ...

A method of obtaining a concentrate containing 53-67% osmium from raw lead with an initial content of 0.0025-0.0050% in the slurry and a concentration number …

In addition, most previous ion exchange experiments were conducted in pure solution system because it was difficult to recovery rhenium from the actual leach solution due to the low concentration of rhenium and the complexity of coexisting impurity ions (Mozammel et al., 2007, Zagorodnyaya and Abisheva, 2002, Agapova et al., 2001).

At the present time, hydrometallurgical technologies are most efficient for processing secondary rhenium-containing raw materials. ... and in the range of rhenium concentration 0.01–0.1 M (based on rhenium) at ammonium carbonate concentrations of 0.5 and 1 M in an (NH 4) 2 CO 3 –AP solution. The temperature was varied in the …

The degree of rhenium concentration at the first stage of processing is 3–3.2 times in the form of water-soluble perrhenate. ... in particular rhenium. The base mineral raw materials for ...