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In addition, the result regarding radiation stability of the microemulsion extraction system indicates that the extraction efficiency of rhenium was almost unaffected given an …
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This study investigates the extraction of rhenium using trialkylbenzyl ammonium chloride (TABAC) as an alternative to trialkylamine (TAA) for recovering rhenium from highly …
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The results of the study showthat the optimal parameters for rhenium extraction are: an extractant concentration of TAA:DA:kerosene=40:5:55 (% by volume), an organic to …
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Modern trends in technological improvement for producing high-quality rhenium-containing molybdenum concentrates are aimed at developing environmentally friendly …
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The re-extraction of rhenium is most efficiently carried out using anammonia solution with a concentration of 114 g/L NH3⋅H2O and a phase contact time of 10 minutes, …
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results, a separation process was proposed using solvent extraction and stripping. Srivastava et al., (2015) explored the extraction of rhenium(VII) from HCl solutions using Cyanex 923 in …
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The results showed that the extraction of 99.8% Mo in a two-stage SX at pH = 1 and O:A = 1 and 99.6% of Re using TOA in a single-stage extraction at pH = − 0.3. In the other …
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Results from the pilot plant experimentation show that . ... For rhenium extraction, electrochemical dissolution is used in the case of processing of heat-resistant alloys, roasting …
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The low mass transfer effect of dilute solution results in low recovery efficiency of critical metal Re ions from ultralow-concentration metallurgical industrial effluents.Bubble …
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This study investigates the extraction of rhenium using trialkylbenzyl ammonium chloride (TABAC) as an alternative to trialkylamine (TAA) for recovering rhenium from highly diluted solutions.
WhatsApp: +86 18221755073
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 …
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The results showed that the mixture of TOA (20%) and TBP (30%) diluted in kerosene was an efficient selective extract system (pH of 9.0 for the feed solution, room …
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In the future, the separation and extraction of rhenium in dirty acid should be developed toward green environmental protection, short process, and high selectivity. Rhenium is a strategic …
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The present work addresses the recovery of rhenium from scrub liquor of molybdenite concentrate roasting fume and dust by solvent extraction method. According to …
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According to the actual hydrometallurgy system, the pH of the dilute solution after rhenium extraction is approximately 4 [37]. Therefore, in consideration of the Re precipitation …
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Rhenium is extracted from roasting fume and dust, leaching residue, and aqueous solution to produce a rhenium bearing solution. Subsequently, rhenium rich solution is …
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Rhenium is extracted from roasting fume and dust, leaching residue, and aqueous solution to produce a rhenium bearing solution. Subsequently, rhenium rich solution is generated by …
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The rhenium extraction mechanism primarily comprises ion exchange (electrostatic effect) and chelation (ligand effects). ... however, the extraction process may result in emulsification due …
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The developed technology makes it possible to extract rhenium with a high degree of extraction in the form of water-soluble compounds for the subsequent production of commercial salts of …
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In the single-stage extraction experiments, effect of the aqueous to organic phase ratios, Q a /Q o, and the number of extraction stages, N, on the rhenium extraction was studied. It was found that using the phase ratio of 1:1 in a two …
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Experimental results showed that that rhenium is preferentially leached in the sodium bicarbonate solution. Rhenium recovery reached 97% for crushed catalysts, and 87%
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Copper smelting by-products are key raw materials for the production of selenium, tellurium, molybdenum, and rhenium. Understanding the distribution of these elements during …
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The results showed that the extraction at a concentration of A:O = 1:25, contact time = 10 min, pH = −0.5, and temperature = 25 °C was > 99.9 for Re in 100 mg/L Re synthetic …
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The recovery methods of rhenium alloy scrap mainly include pyrometallurgical recovery, hydrometallurgical recovery, solvent extraction, electrochemical method, etc …
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A high rhenium extraction percentage (95.43%) in the phase ratio 1:1 was achieved using a counter-current four-stage extraction process. ... Experimental results indicate that the …
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The results showed that the optimum condition extraction process to feed each of 10 ppm is when the agitation for 10 minutes, the volume of MEK in 20 ml, and the pH below 5. …
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Rhenium-molybdenum separation in an alkaline leaching solution of a ... ... [article]
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Rhenium's maximum extraction was 93.8 % at pH = 0.5, [TBP] = 2.54 mol/L and, organic to aqueous phase ratio of 2:1, and molybdenum extraction under these conditions was …
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This study reviews the technical difficulties of rhenium extraction from dirty acid as follows: (1) The content of main metal elements is too low, and the content of rhenium in dirty acid is only 5–40 …
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The extraction results are summarized in Table 7. The results show that while individual extractants ([A336] and [Cy272]) ... Improvement of the solvent extraction of rhenium from …
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