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(PDF) Review of rhenium extraction and recycling

The results showed that over 99.9% of rhenium and 90.4% of Mo could be co-volatilized within 30 min when temperature was 1050 °C.

Solvent extraction of rhenium from molybdenum in

2009-7-1  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 βRe/Mo is relatively good (1.7 × 10 3).

Solvent extraction of rhenium from molybdenum in

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). The optimum extraction conditions have been determined

(PDF) Extractive Metallurgy of Rhenium: A Review

Conventional methods for the extraction of rhenium from the industrial waste water mainly include chemical precipitation [4], solvent extraction [7][8][9] and ion exchange

Liquid–liquid extraction of rhenium(VII) from an acidic

2015-10-1  Rhenium extraction was found to increase from 4.9% to 97.8% over the studied extraction range. The resulting effect of an increase in extractant concentration was a possible cause of the shift in metal distribution curve ( Ritcey and Ashbrook, 1984 ).

Extraction and separation performance of

2019-12-5  Furthermore, an increase in rhenium extraction was also observed as a result of its co-extraction with U(VI). D Re has a value of 3 at 1 mol L −1 HNO 3 and 2.2 without uranium in the rhenium extraction as shown in Fig. 2 .

Extraction of Molybdenum and Rhenium by Electro

2021-1-13  The results of pH and pulp density experiments indicate that molybdenum and rhenium extractions of 98 to 99 percent can be achieved from low-grade concentrates, but that each concentrate should be investigated individually to determine optimum operating conditions.

Recover Rhenium by Solvent Extraction

2018-11-24  Experimental results indicate that distribution ratio of rhenium increases sharply with increasing amine concentration. Effect of operating phase ratio on the distribution ratio of rhenium shows that as aqueous to organic ratio (A/O) increases from 1 to 15,distribution ratio (DRe) decreases from 48 to 23, for extraction

SOLVENT EXTRACTION OF RHENIUM(VII) WITH

ABSTRACT The extraction of rhenium(vii) with benzo-15-crown-5 (B15C5) and dibenzo-18-crown-6 (DB1SC6) into 1,2-dichloroethane was investigated. The presence of K+, NH4 + or Na+ in aqueous phase was necessary for the extraction.

Recent advances of rhenium separation and

2018-3-1  Experimental results showed that the extraction (enrichment) rate of rhenium could be more than 99.4% under the optimal condition, while the purity of Re (in the form of ReO 4 −) was above 99.9% after further treatment.

(PDF) Review of rhenium extraction and recycling

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 method of extraction of rhenium

From the results shown in the table.4, it follows that the use of the claimed method of extraction of rhenium from solutions will: to provide a high degree of extraction of rhenium from poor solutions; to reduce the duration of the technological cycle sorption regeneration rhenium up to 2 hours;

Solvent extraction of rhenium from molybdenum in

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 ).

Recover Rhenium by Solvent Extraction

2018-11-24  Experimental results indicate that distribution ratio of rhenium increases sharply with increasing amine concentration. Effect of operating phase ratio on the distribution ratio of rhenium shows that as aqueous to organic ratio (A/O) increases from 1 to 15,distribution ratio (DRe) decreases from 48 to 23, for extraction with 1% amine at a pH

Study of the Possibility of Rhenium Extraction and

2007-11-5  • 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.

Thermodynamics of Solvent Extraction of

2010-3-11  At temperatures from 278.15 to 303.15 K, equilibrium molalities of ReO4 − were measured in the aqueous phase containing NH4Cl as supporting electrolyte at ionic strength from 0.1 to 2.0 mol · kg−1 and at constant initial molality of extractant. The standard extraction constants K 0 at various temperatures were obtained by methods of Pitzer’s theory. Thermodynamic properties for the

Extraction of molybdenum and rhenium from

OSTI.GOV Technical Report: Extraction of molybdenum and rhenium from concentrates by electrooxidation Title: Extraction of molybdenum and rhenium from concentrates by

Sustainable Extraction and Separation of Rhenium and

2019-1-9  Sustainable Extraction and Separation of Rhenium and Molybdenum from Model Copper Mining Effluents Using a Polymeric Aqueous Two-Phase System Lucy Muruchi,† Nicolas Schaeffer,‡ Helena Passos,‡ Carlos M. N. Mendonça, ‡ João A. P. Coutinho, *,‡ and Yecid P. Jimenez*,† †Departamento de Ingeniería Química y Procesos de Minerales, Facultad de Ingeniería, Universidad

Extraction and separation performance of

The extraction behavior and separation performance of Re(VII) and U(VI) from the nitric acid medium were studied respectively, in which an asymmetrical diglycolamides, N,N'-dimethyl-N,N'-dioctyldiglycolamide (DMDODGA) was used as the extractant, and 40/60(v/v)% n-o

Recent advances of rhenium separation and

2018-3-2  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 temperature, phase ratio 1:1), whose extraction efficiency of molybdenum was 1.7%, of rhenium was 96.8%, and the separation coefficient β Re/Mo was quite good (1.7 × 10 3). In

Study of the Possibility of Rhenium Extraction and

2007-11-5  • 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.

Solvent extraction of rhenium from molybdenum in

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 ).

Determination of Rhenium in Environmental Samples

2001-9-23  Determination of Rhenium in Environmental Samples Using an Extraction This paper presents results from a novel and simpler method that gives consistently high Re The procedu re includes an extraction chrom atographic resin (TEV A resin, Eichro m Ind. Inc.) previously identified as having a high selectivity for Re and Tc. 7

Extraction of rhenium (VII) by tetraoctylammonium

2011-6-1  Abstract Regularities of extraction of rhenium (VII) melt tetraoctyl-ammonium bromide in a mixture of higher alcohols and paraffin were determined. Quantitative extraction of measurements obtained in the range of pH of the aqueous phase 1.5–2.0 was carried out. It was shown that the degree of extraction of rhenium is reduced during the transition from sulfuric to nitric acid. The

Thermodynamics of Solvent Extraction of

2010-3-11  At temperatures from 278.15 to 303.15 K, equilibrium molalities of ReO4 − were measured in the aqueous phase containing NH4Cl as supporting electrolyte at ionic strength from 0.1 to 2.0 mol · kg−1 and at constant initial molality of extractant. The standard extraction constants K 0 at various temperatures were obtained by methods of Pitzer’s theory. Thermodynamic properties for the

Study of Rhenium Bioaccumulation in Lucerne

2008-10-29  The results show that the Lucerne is a hyperaccumulator of Re and can be used as a source for Re production. and extraction of rhenium from the remaining ash by an alkaline solution. The problem about these two procedures is that the The aim of the present study is to achieve additional

Tsvetnye Metally Rhenium and platinum extraction from

2016-1-10  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 their finding in a reactionary zone on 8-10 hours.

Sustainable Extraction and Separation of Rhenium and

2019-11-8  A sustainable and flexible approach for the extraction and separation of rhenium and molybdate species based on a polymeric aqueous two-phase system (ATPS) is proposed in which the high metal content in concentrated copper effluents is directly used as the driver of phase demixing. The partition coefficient and selectivity of Re, Mo, and Cu are studied in the proposed polymer-CuSO4

Breakthrough curves for adsorption and elution of

2019-12-21  rhenium are separated from a relatively large amount of molybdenum. Some methods such as precipitation, chlorination (Snell et al., 1973), adsorption on activated carbon (Jabbarzareh, 2001), solvent extraction (Hudson and Tyler, 1990) and ion exchange (Badami, 2004) are used for selective rhenium extraction from these solutions.

qPCR Climbing to Success Rhenium

7. Analyze qPCR results. Using Applied Biosystems’ analysis tools. Getting good results depends upon having a good workflow and using the right tools! Luckily, we at Rhenium