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 It was found possible to concentrate rhenium 24 444 times as compared to its initial concentration in soils using ethanol extraction from green plant
rhenium and sulfur were also revealed which could provide the basis for effective molybdenum and rhenium extraction 2 Experimental Materials The low grade rhenium bearing molybdenum concentrate was collected from separation in a copper mine The chemical components of the material are shown in Table 1 The molybdenum content is %
The extraction of rhenium VII and molybdenum VI from chloride media by mixtures of bis 3 5 dimethylhexyl 4 methylhexyl amine N298 and tributylphosphate TBP was studied in the present paper The mixtures had higher synergistic effects on Re VII than that of Mo VI and the maximal synergistic factor was obtained at a ratio of N298 to TBP of 1 to 9
The selective extraction of rhenium from the leach liquor of molybdenite roasting flue dust and its subsequent stripping were investigated using the solvent extraction technique In this study tri butyl phosphate TBP as organic extractant in kerosene and metals bearing solution in mg/L 6042 Mo 208 Re 534 Cu 1982 Fe 32 Mg and 19 Pb were used as the organic and
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 It was found possible to concentrate rhenium 24 444 times as compared to its initial concentration in soils using ethanol extraction from green plant
the availability of rhenium at prices low enough to encourage research to satisfy rhenium demand In addition the tech nology of pressure leaching has been well established through the production of alumina from bauxite and extraction of some rare earth metals from its ores Studied in this work is the hydromet allurgical extraction of rhenium
The results of the application of the synergistic extraction system to rhenium separation is resented in Table 2 As shown even in the presence of high arsenic concentrations the synergistic extraction system of TBP Alamine 336 can selectively bind and extract the perrhenate ion instead of arsenate in solution
From the results 5vol% TOA dissolved in kerosene is found to be selective for extraction of rhenium as compared with molybdenum It extracted molybdenum with extraction efficiency of less than 30% whereas rhenium with extraction efficiency of more than ³99% The optimum extraction conditions have been determined as 5vol% TOA 900s of
A quantitative rhenium extraction >% could be yielded while contacting the metal bearing aqueous with mol/L TBP at unit phase ratio as predicted by the McCabe Thiele diagram for
The maximal rhenium VII extraction was found at weak acid concentrations in aqueous phase pH 2 3 whereas the TIOA ketone mixture could extract rhenium VII from weak alkaline media pH
Results showed molybdenum extraction efficiency is below 10 percent and rhenium extraction efficiency above 94 percent Rhenium extraction efficiency from molybdenite roasting dust leached in water in the mixer settler using 3 counter current extraction stages at pH = 0 O/A = 1 2 diluted TBP in Kerosene and room temperature was reported
The results of the application of the synergistic extraction system to rhenium separation is resented in Table 2 As shown even in the presence of high arsenic concentrations the synergistic extraction system of TBP Alamine 336 can selectively bind and extract the perrhenate ion instead of arsenate in solution
The substitution of rhenium in its applications is very limited and there is no suitable substitute without losing essential performance Furthermore global extractable primary rhenium resources are predicted to deplete within 130 years In this paper rhenium
In this work the factors that determine a high or low extraction performance when using ionic liquids ILs as diluents in the solvent extraction of Rhenium Re VII from aqueous solutions were
The possibility of selective leaching process was investigated during molybdenite flue dust leaching to recover its rhenium content The results show that addition of alcohols to water makes the medium less favorable for molybdenum transfer into aqueous phase On the other hand addition of small amounts of alcohols 5 15% makes a noticeable
Isodecanol and 80% Anysol 150 to extract rhenium from a liquor containing 260 280 mg/L Re and 80 90 mg/L Mo Srivastava et al 2015 addressed the extraction of rhenium VII from a HCl solution
The results indicate that for the whole concentration range the extractions of Re VII were not greater than 5% meaning that the IL is not capable of extracting considerable amounts of Re VII by itself The extraction percentage using only [C 4 C 1 im][Tf2N] was also measured being around %
Technetium VII and Rhenium VII Extraction by a New Diamide Reagent 2 2 Imino bis N N dialkylacetamide IDAA Yuji SASAKI 1 Yumi SUGO 1 Morihisa SAEKI 1 Yasuji MORITA 1 and Akira OHASHI2 1 Nuclear Science and Engineering Directorate Japan Atomic Energy Agency Tokai Ibaraki 319 1195 Japan 2 Department of Chemistry Ibaraki Univeraity Bunkyo 2 1 1
The extraction of rhenium from molybdenite roasting dust leach solution was performed using a mixersettler extractor by tributyl phosphate TBP diluted in kerosene as the extractant In the single stage extraction experiments effect of the aqueous According t o t he results recovery of rhenium from t he scrub l iquor i s n ot practical
