rhenium extraction results
(2018). Investigation on ammonium perrhenate behaviour in nitrogen, argon and hydrogen atmosphere as a part of rhenium extraction process. Mineral Processing and Extractive Metallurgy: Vol. 127, No. 3, pp. 182-188.
We choose the extraction of rhenium(VII) from mixtures of aqueous choline chloride. aqueous sodium chloride and ethaline by a dilute solution of an ionic liquid (aliquat 336) in ethyl benzene. ... Table 3 Summary of the rhenium distribution ratio results (lines 1, 2 and 4). Line 3 was obtained by extrapolation
6/1/2011· Results and discussion Results of studies on the extraction of rhenium by TOABHA-kerosene solution with the concentration of TOAB of 1Ã 10-2 m showed that quantitative extraction of metal is achieved at pH of 1.5 for 3 min of phase contact.
Scale formation in pipelines, tanks, heat exchangers,pumps and sprayers results in reduced flows, increased energy costs, decreased heating or cooling efficiency and costly downtime for cleaning and scale removal. ... Rhenium: Rhenium solvent extraction using Aliquat ...
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.
US3244475A US234567A US23456762A US3244475A US 3244475 A US3244475 A US 3244475A US 234567 A US234567 A US 234567A US 23456762 A US23456762 A US 23456762A US 3244475 A US3244475 A US 3244475A Authority US United States Prior art keywords rhenium aqueous organic molybdenum solvent Prior art date 1962-10-31 Legal status (The legal status is an assumption and is …
4/12/2019· Results of the effect of changing the rhenium substrate on the efficiency and composition of hexaamminecobalt(III) perrhenate. ... from washing after elution were collected and mixed with the first portion of solution from elution and then sent to rhenium extraction on aluminum oxide. The second portion from elution (addressed to neutralization ...
RECYCLING OF RHENIUM: D.V. Drobot, V.I. Bukin, Moscow State Academy of Fine Chemical Technologies, Pr. Vernadskogo 86, 117571 Moscow, Russia The aim of the investigation is the generalization of the published results according of rhenium extraction from secondary materials.
OSTI.GOV Technical Report: Extraction of molybdenum and rhenium from concentrates by electrooxidation Title: Extraction of molybdenum and rhenium from …
1/22/1980· Extraction process for recovery of rhenium ... The foregoing Bureau of Mines Report also states that reuse of the organic results in lower extraction efficiencies particularly when perchloric acid was used as the stripping agent. ... The prior art solvent systems lost extraction efficiency and new extractant had to be added because rhenium ...
Selective extraction of ions of rhenium (VII) from aqueous solutions of metal cations relates to the field of extraction of substances with the use of sorbents and can be used in ferrous and nonferrous metallurgy, as well as for industrial wastewater purification and recycling of non-ferrous metals containing rhenium …
• by ethanol extraction of rhenium from raw leaves additionally purification of the leaching solution from impurities is achieved Based on the results, it may be concluded that extraction of rhenium from raw leaves by hot ethanol is better for its recovery than is direct incineration of plant mass.
Rhenium is the rarest element in the Earth's crust. Rhenium is probably not found free in nature, but occurs in amounts from 0.001% up to 0.2% in the mineral molybdenite, the biggest commercial source. SECONDARY RESOURCES Rhenium is mainly extracted as by-product of copper-molybdenum deposits, with about 80 percent recovered from flue
Molybdenum and rhenium extractions of 98 to 99 percent were achieved from several concentrates containing 4.76 to 28.6 percent molybdenum and 180 ppm to 1,000 ppm rhenium. Optimum results were obtained by maintaining ph values between 5.5 and 7.0 During electrolysis and allowing the final ph to rise to about 8.2.
Carrying out the extraction can only partially reduce the content of magnesium, iron and nickel. Concentrations of other metals remain practically invariable. Ion-exchange treatment reduces the content of impurity metals. Results of the analysis before and after cleaning of ammonium perrhenate are presented in Table 1. Table 1.
The results show that the mixture of 20% triotylamine and 30% tributyl phosphate diluted kerosene oil is selective extractant of rhenium with respect to molybdenum. It extracted molybdenum with extraction efficiency of 1.7%, while rhenium was extracted with efficiency of 96.8%, and separation coefficient β Re/Mo is relatively good (1.7 × 10 3 ).
Separation of 188Re is performed in generators by column chromatography, extraction or by gel technology. The best results are obtained using chromatographic 188W/188Re generator in which 188W is adsorbed on aluminium. Rhenium-188 is eluted in saline solution.
Molybdenum and rhenium were recovered as ammonium paramolybdate and ammonium perrhenate. Based on pru results, an industrial-sized cell was constructed and tested for extraction of metal values from offgrade molybdenite concentrates.
Rhenium – a valuable and rare element Limited resources make rhenium one of the rarest metals in the Earth's crust. Only certain ores contain traces of rhenium and its extraction takes place exclusively as a by-product of the processing of these ores.
Study of Rhenium Bioaccumulation in Lucerne (Medicago) and ... The results show that the Lucerne is a hyperaccumulator of Re and can be used as a source for Re production. ... extraction of rhenium from plant mass and its purification from main ash elements such as K, Ca,
9/20/1977· Extraction process for recovery of rhenium ... The foregoing Bureau of Mines Report also states that reuse of the organic results in lower extraction efficiencies particularly when perchloric acid was used as the stripping agent. ... The prior art solvent systems lost extraction efficiency and new extractant had to be added because rhenium ...
A quantitative rhenium extraction (>99.6%) could be yielded while contacting the metal-bearing aqueous with 0.65 mol/L TBP at unit phase ratio, as predicted by the McCabe-Thiele diagram for ...
The degree of extraction of valuable components for the burnt and not burnt catalyst are practically equal (platinum – 87.2%, rhenium – 84.1% and platinum – 89.1%, rhenium – 87.5% accordingly), however for processing of the burnt catalysts are necessary more long time of …
Rhenium's unique properties make it suitable and attractive for all applications requiring resistance to high temperatures, and damage and deformation. For KGHM rhenium is a by-product of the copper production process. Metallic rhenium. KGHM produces its metallic rhenium in the form of gray tablets.
The present work addresses the recovery of rhenium from scrub liquor of molybdenite concentrate roasting fume and dust by solvent extraction method. According to the results, recovery of rhenium ...
The present invention extracts precious metals from an acidic solution containing precious metals in an early and highly efficient manner. Provided is an extraction agent for precious metals that is represented by the general formula below. In the formula, R1 and R2 each represent the same alkyl group or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents ...
OSTI.GOV Patent: Solvent extraction process for the recovery of molybdenum and rhenium from molybdenite
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 ...
Molybdenum-rhenium extraction was unaffected by presence of chalcopyrite in the molybdenite concentrate; however, molybdenum extraction declines if the copper content, as chalcocite, exceeds 7 pct. High-purity molybdenum and rhenium compounds can be recovered from the electrolyzed reaction mass by liquid-solid separation, solvent extraction ...
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.5 In this context, there is a growing need for sustainable mining
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