Rhenium was stripped from the organic phase with a HClO4 solution and recovered by electrolytic deposition. This method was also used to extract …
Molybdenum and rhenium responded comparably to changes in bioleaching conditions, suggesting that Re was located in the molybdenite matrix. Their relative dissolution was <1% Mo and <6% Re, and only a minor enhancement of their dissolution was observed upon Ag addition. ... Molybdenum recovery from sulfide and oxide ores. …
The recovery and separation of rhenium and molybdenum from acidic aqueous solutions that simulate mine waters is studied through an adsorption …
The molybdenum recovery increased from 93% to - as the roasting temperature was varied from 570 to 650. ... can be selectively extracted from the calcine by leaching with water prior to its treatment with dilute HZS04 for molybdenum recovery. Rhenium recoveries of about 74% were obtained when the calcine was leached with …
In the research, the selective rhenium recovery from industrial leach solution using the synergistic extraction system was investigated. In the single extraction experiment, the part of bismuth in the chloridizing leach solution was exchanged into the organic phase during the extraction of rhenium. ... Recovery of rhenium and …
We developed a process including acid leaching, solvent extraction and stripping in order to recycle spent catalyst. In this study, we …
Ion exchange separation of rhenium using Purolite A-170 and Purolite A-172 was carried out from the dust leach solution of molybdenite concentrate. Different parameters such as effect of contact time, equilibrium pH, and solid liquid ratio were investigated. The optimum absorption condition for Purolite A-172 resin was determined, …
Meanwhile, it was provide an effective approach to the selectivity for molybdenum and rhenium in the presence of excess of other metal ions. 2. Experimental2.1. Materials. Rhenium and molybdenum stock solutions were prepared by dissolving NH 4 ReO 4 and (NH 4) 6 Mo 7 O 24 ·4H 2 O, respectively, in hydrochloric …
Activated carbon was used to adsorb and concentrate rhenium and molybdenum from liquors (pH 6–8) produced from a pilot plant set up to scrub a fume generated by a molybdenite roaster. The kinetics of adsorption of Re and Mo relating the loading of Mo or Re (Q t) to concentration at time t (C t) and carbon concentration (X) …
Recovery of rhenium from molybdenum and copper concentrates during the Looping Sulfide Oxidation process. Joseph D. Lessard, D. Gribbin, L. N. Shekhter. …
An alternative, integrated method for processing sulfide molybdenum concentrate to recover molybdenum and associated rhenium is proposed. The method …
The geochemical link between rhenium and molybdenum is based on the similar radii of Re 4+ (77 pm) and Mo 4+ (79 pm). ... (2010) Recovery of rhenium from mineral raw materials of Kazakhstan. In: XXV International Mineral Processing Congress, pp 1–19. Abundance of elements in the Earth's crust and in the Sea, CRC Handbook of …
Rhenium and molybdenum stock solutions were prepared by dissolving NH 4 ReO 4 and (NH 4) 6 Mo 7 O 24 ·4H 2 O, respectively, in hydrochloric acid and ammonium hydroxide. Chloride salts of copper, iron, zinc and manganese were used to prepare test solutions of the respective metals. ... Recovery of rhenium and molybdenum from a …
The recovery of rhenium from the fume was about 85% as calculated from mass balance, indicating some gaseous Re might have re-condensed or re-crystallised as aerosol and settled in the cool part of the fume extraction circuit. ... Recovery of rhenium and molybdenum from a roaster fume scrubbing liquor by adsorption using activated …
Currently the basic resources in the world for rhenium recovery are acid solutions formed during the wet purification of dust-gas-mixture produced at …
recovery of rhenium and molybdenum. 2. Experimental 2.1 Materials A synthetic alkali leaching solution was employed in the experiment to maintain the consistency of study. The leaching solution was prepared by adding desired amounts of rhenium powder (>99.9%, Aldrich), sodium molybdate (>99.0%, Samchun), calcium chloride (>99.0%, Junsei),
Molybdenum (Mo) and rhenium (Re) are strategic key metals for the development of modernization. In nature, 99 wt.% of Re is associated with molybdenite minerals via the form of isomorphism, and the element abundance of Mo (about 1.1–1.5 ppm) and Re (about 0.0004–0.0026 ppm) is tremendous in the continental crust.
Alternatively, another practical option for rhenium recovery may involve the industrial utilization of hydrometallurgical pressure oxidation of molybdenum concentrates. The enhanced recoveries of this process may make it another viable choice to traditional roasting processes, though it involves the use of elevated temperatures/pressures and ...
Investigation on the recovery of rhenium in the high arsenite wash acid solution from the copper smelting process using reducing sulfide precipitation method. ... Brown algae based new sorption material for fractional recovery of molybdenum and rhenium from wastewater. Chem. Eng. J., 273 (2015), pp. 231-239, 10.1016/j.cej.2015.03.054.
Rhenium is recovered during pyrometallurgical processing of molybdenum sulfide and copper sulfide ores; the traditional technology involves removing rhenium(VII) oxide, Re2O7, from the sulfurous ...
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 ...
Seo et al. (2012) studied the recovery of rhenium and molybdenum from scrubbing liquor using activated carbon. Their research was conducted under similar conditions to consider the kinetics of the ...
Amine functional group was grafted to obtain modified persimmon waste gel (NH2–CPT) with the focus of development of selective recovery of molybdenum from rhenium. The adsorption behavior of the NH2–CPT gel for various metal ions at varying hydrochloric acid concentrations was studied. It is found that the NH2–CPT exhibits high …
In 2021, the price of catalytic-grade APR averaged $1,000 per kilogram, a 12% decrease from the annual average price in 2020. The rhenium metal pellet price averaged $980 per kilogram in 2021, a 5% decrease from the annual average price in 2020. In 2021, apparent consumption in the United States decreased by 6% compared with that in 2020.
The sulfuric acid solution obtained by wet-scrubbing of molybdenite flue-dust is being processed for the separation of rhenium, as Re(VII) from molybdenum, as Mo(VI) and other metal impurities [4]. The trioxide of molybdenum and heptaoxide of rhenium in molybdenite flue-dust gets readily hydrolyze in aqueous solution and forming different ...
An alternative, integrated method for processing sulfide molybdenum concentrate to recover molybdenum and associated rhenium is proposed. The method involves oxidizing roasting without the release of sulfur dioxide, dust entrainment, and loss of valuable metals and two-stage leaching with selective dissolution of rhenium and, …
A variety of processing technologies exist for recovery from both primary and secondary sources of rhenium. Currently, there are no known primary rhenium deposits; thus, the method in which primary rhenium is …
Most rhenium occurs with molybdenum in porphyry copper minerals. The Re values therefore follow the same processing routes such as flotation from which copper sulphide or molybdenum sulphide concentrates are recovered. Typically 50–100 g/t (ppm) Re can be recovered with the copper or molybdenum sulphide concentrates (Abisheva …
DOI: 10.1016/J.SEPPUR.2017.09.021 Corpus ID: 104125676; Selective recovery of rhenium from molybdenite flue-dust leach liquor using solvent extraction with TBP @article{Cheema2018SelectiveRO, title={Selective recovery of rhenium from molybdenite flue-dust leach liquor using solvent extraction with TBP}, author={Humma …
Rhenium is recovered during pyrometallurgical processing of molybdenum sulfide and copper sulfide ores; the traditional technology involves removing rhenium …
