recovery rhenium process
Recovery of Re(VII) from aqueous solutions with coated impregnated
Rhenium recovery is predicted to be a process with a great potential because over 80% of rhenium can be recovered (Shen et al., 2021). Currently, the processes used to recover Re(VII) from aqueous solutions are mainly based on ion-exchange resins (Guo et al., 2019) and solvent extraction (Hong et al., 2020; Patil and …
ادامه مطلب
Ion exchange recovery of rhenium from industrially relevant …
The recovery of rhenium from waste superalloys has always been a research focus. This study focuses on the performance of extraction of rhenium and its separation with molybdenum in alkali leaching solution of waste superalloy by methyl ctylammonium chloride (N263). ... Co-volatilizing-water leaching process for efficient utilization of ...
ادامه مطلب
Leaching kinetics, separation, and recovery of rhenium and …
A detailed thermodynamic study of the reaction conditions used in LSO process indicates that rhenium recovery is possible at higher rates than currently realized in the industry. Conditions at which Re 2 O 7 is reduced to rhenium metal by S 2 have been identified and key process conditions are outlined to maximize performance of the LSO …
ادامه مطلب
Adsorption of rhenium (VII) on 4-amino-1,2,4-triazole resin
1) The rhenium (VII) perrhenate ion can be optimally adsorbed on 4-amino-1,2,4-triazole resin in the HAc–NaAc buffer system at pH 2.6. The saturated adsorption capacity on the synthesized resin was 354 mg·g − 1 resin at 298K. Re (VII) adsorbed on 4-ATR can be eluted quantitatively by using 4.0 mol·L − 1 HCl with practically fast kinetics.
ادامه مطلب
(PDF) Pressure Oxidation of Molybdenum Concentrates
The significant presence (0.159%) of rhenium, a high-priced metal used in nickel-superalloys, serves as major motivation for processing of this concentrate. Pressure oxidation offers an ...
ادامه مطلب
Review of rhenium extraction and recycling technologies
Recycling rhenium from spent alloys and catalysts is a multi-step process combining pyrometallurgical and hydrometallurgical techniques, where its separation and the subsequent steps are similar to that of extracting rhenium from primary resources. ... (2011) summarized the recovery technologies of rhenium from mineral raw materials in ...
ادامه مطلب
Review of rhenium extraction and recycling technologies …
Rhenium can be recovered together with tungsten, molybdenum, platinum and other valuable metals from spent catalysts, which contain about 0.3 wt% Re. Every …
ادامه مطلب
Precious metals catalyst: understanding the technology (ERTC)
Traditionally, precious metals catalyst refiners recover PGMs and rhenium by dissolving the spent catalysts in strong caustics or acids. This hydrometallurgical recovery process is commonly referred to in the industry as 'digesting'. Digestion serves well to recover the precious metals from spent process catalysts in most cases.
ادامه مطلب
Adsorption and desorption properties for rhenium using a
In this paper, a weak-base resin was adopted to recycle rhenium because of its excellent adsorption and desorption properties for rhenium, while the kinetics and thermodynamics properties of adsorbing rhenium from the rhenium stock solution were systematically investigated. The kinetics investigations confirm that the adsorption …
ادامه مطلبInvestigation on the recovery of rhenium in the high
The recovery of rhenium from acidic wash solution originating from a copper smelting process using sodium thiosulfate were investigated. Effects of reaction time, reaction temperature, flocculant ...
ادامه مطلب
Recent advances of rhenium separation and enrichment in China
The new RIP rhenium recovery process featured higher selectivity, short process, less costs and environmental compact compared to the typical process. Dai et al. developed a new method to prepare periodic mesoporous organosilica (PMO) materials, on which ionic liquids were immobilized and ionic functional groups could be introduced …
ادامه مطلب
A Novel Aqueous Processing of the Reverted Turbine-Blade
On a metal-to-metal basis, the recovery value of 93% rhenium as NH4ReO4 (9.5 g L−1 Re in the solution) demonstrated the potential of the present process. Discover the world's research 20 ...
ادامه مطلب
Recovery of metals and other beneficial products from coal
Increasing production and disposal of coal fly ash (CFA) is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery of these potential resources from CFA can be an …
ادامه مطلب
A review of the alumina recovery from coal fly ash, with a focus in
The recovery process was based on the auto-disintegration of sinter containing calcium aluminates and dicalcium silicate [30]. The sinter was mixed with sodium carbonate and underwent a series of complicated chemical treatments including carbonization and water scrubbing to produce alumina and Portland cement. In 1953, a …
ادامه مطلب
Electrochemical recovery of rhenium from W–Re alloys in the …
The recovery of rhenium from them can be carried out by various pyro-and hydrometallurgical methods [5]. At the same time, electrochemical methods are the most promising way for fast and effective ...
ادامه مطلب
Recovery of rhenium from tungsten‑rhenium wire by alkali fusion …
The alkali melting method mainly used molten sodium salt to convert tungsten‑rhenium alloy into soluble sodium tungstate and sodium perrhenate [27], then ReO 4 − was adsorbed by ion-exchange resinas in the current plant recovery process. A.M. Levin [28] investigated an electrochemical dissolution process to recovery VR20 …
ادامه مطلب
Rhenium(VII) solvent extraction with mixtures of tertiary amine …
Introduction. Tertiary aliphatic amines R 3 N with hydrocarbon radicals of the С 8 –С 10 groups are widely used in rhenium technology. In particular, they have long been employed in commercial recovery of rhenium from scrubbing sulphuric acid solutions of the gas purification system at copper smelters of the Zhezkazganredmet state enterprise, …
ادامه مطلب
Extraction and Recovery of Molybdenum and Rhenium from …
The Federal Bureau of Mines has successfully demonstrated an electrooxidation-solvent extraction-carbon adsorption process for recovering molybdenum and rhenium from offgrade concentrates. The flow sequence consists of dissolution of metal values by electrooxidation, liquid-solid separation by thickening, acidification and chlorate ion …
ادامه مطلب
Recent advances of rhenium separation and enrichment …
There are two basic methods for the recovery of rhenium and other PGM metals when these catalysts were deactivated: (1) Complete dissolution of the alumina …
ادامه مطلب
Melting of Gold-Containing Concentrates with Copper
Recovery of rhenium in slag proceeds rapidly, and ceases in 10 min. The behavior of osmium is more critical towards observation of process parameters and especially process temperature and duration. Its recovery ceases in 20–25 min, and further exposure of a melt at the recovery temperature leads to distillation and loss of osmium …
ادامه مطلب
Recovery Rhenium from roasted dust through super Para …
In this research, after providing metal ions solution, the absorption of Rhenium ions is examined under different operational conditions through the super Para-magnetic Nano-particles of Fe3 O 4, which helped to determine the best conditions for absorption to occur. Washing the Nano-absorbent after recovering Rhenium ions from Nano-particles ...
ادامه مطلب
Extractive metallurgy of rhenium: a review | SpringerLink
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 produced is dependent on the commodity of which it is a byproduct, e.g., copper, molybdenum, uranium, etc. In addition, focus on the …
ادامه مطلب
Rhenium
In 2020, rhenium production in the United States decreased by 6% compared with that in 2019. A rhenium recovery facility in Utah was closed in 2019; however, the company announced the possibility of reopening the facility in the near future. During 2020, the United States continued to rely on imports for much of its supply of rhenium.
ادامه مطلبRhenium: Properties, Production, and Applications
Rhenium recovery from flue gases in molybdenite roasting. From porphyry copper ores, 0.3 – 1.6% copper and 0.01 – 0.05% molybdenum are ground and concentrated by flotation. ... This process converts petroleum naphthae from a low octane rating into high octane, unleaded, antiknock fuel products for internal combustion engines and aromatic ...
ادامه مطلبBrown algae based new sorption material for fractional recovery …
Hydrometallurgical process is appropriate to deal with low-grade Mo concentrates, but leaching efficiency of Mo is low and numerous expensive oxidants are consumed. ... Recovery Rhenium from roasted dust through super Para-magnetic Nano-particles. International Journal of Refractory Metals and Hard Materials, Volume 60, …
ادامه مطلب
Rhenium: a hidden asset
In fact, most precious metals catalyst refiners recover rhenium by dissolving their carriers (typically aluminium oxide) using strong caustic or acidic chemicals in a process that is …
ادامه مطلب
Technology and Base Metals, Metal Separation and Recovery
Rhenium recovery, as perrhenate ion (ReO 4-), is well over 99% and rhenium purity vs. other metals is 99.99+%. Rhenium separation is from a <1 g/L feed solution and the perrhenate ion eluate is a >10 g/L rhenium concentrated solution. The perrhenate ion is converted to the desired perrhenate acid or salt product.
ادامه مطلب
Recovery of Molybdenum from Metallurgical Wastewater by Fe(III
In this work, the MoO 4 2− solution is prepared from sodium molybdenum dihydrate (Na 2 MoO 4 ·2H 2 O, Tianjin Yongda Chemical Reagent Co., Ltd.). The Fe 3+ is used for in-situ preparation of metal hydroxyl coagulant adsorbents, and it is from iron chloride hexahydrate (FeCl 3 ·6H 2 O, ).Humicacid (HA, Tianjin Yongda …
ادامه مطلب
US8956582B2
There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example super-alloys, which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably an aqueous mixture of hydrochloric acid and nitric acid, so as to …
ادامه مطلب
Adsorption-controlled preparation of anionic imprinted amino
What's more, because of the high value of rhenium, the recovery of rhenium from the effluent has both economic and environmental benefits [1]. Selective recognition ability is also a challenge, which is widely used in the fields of analysis, including the detection and extraction of rare metal ions. ... Through the ion-imprinting process, …
ادامه مطلب- sulfur recovery treating
- hematite concentrate recovery
- iron recovery machinery
- floating gold recovery plants worldwide market
- chrome recovery washing machine
- recovery rhenium process
- rhenium recovery technologies
- small gold ore crusher recovery
- mobile gold gemstones silver and tin recovery equipments
- crushers for slag recovery