Selective leaching of molybdenum from copper concentrate by air oxidation was investigated in alkaline solution. • The leaching behaviors of Cu and Mo phase were predicted by Eh-pH diagrams of Mo-S-H 2 O and Cu–Fe–S–H 2 O system, respectively.. The oxidation mechanisms of sulfides in the copper concentrate were …

The extraction isotherm, constructed through McCabe-Theiele plot, depicted two stages counter current process where extraction of both the metals was found to be 99%. 3. Then selective stripping step was followed for vanadium and molybdenum from the loaded organic of Alamine-336.

Extraction and selective stripping of molybdenum(VI) and vanadium(IV) from sulfuric acid solution containing aluminum(III), cobalt(II), nickel(II) and iron(III) by LIX 63 in Exxsol D80 ... (O/A) of 2, the complete removal of vanadium (V) from the loaded organic phase could be achieved. In the selective stripping of molybdenum (VI), almost all ...

The optimal experimental conditions for selective extraction of molybdenum were obtained under hydrochloric acid of 1 mol/L, the P204 dosage of 20 %(v/v), O/A ratio of 1:3 and contact time of 50 min. Besides, the molybdenum loaded in organic phase can be completely stripped with 50 g/L NH 4 HCO 3. The extraction process was based on the …

Hence, in this paper we report the development of a PIM for the extraction, separation and recovery of vanadium(V) from sulfate media containing other metal ions (e.g. molybdenum(VI)). The sulfate media was selected because the leaching from raw materials and the secondary sources containing vanadium are widely performed with sulfuric acid …

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).

Recent studies have reported selective extraction of metals via the addition of potassium in the roasting process. Liu et al. ... In general, both Na 2 CO 3 and K 2 CO 3 can effectively extract vanadium and molybdenum from HCVR; however, K 2 CO 3 can be used to treat HCVR at lower temperatures and dosages. In addition, to obtain the best ...

The separation of vanadium (V) and molybdenum (VI) was studied by co-extraction with an aqueous two-phase system formed by PEG2000 + sodium sulfate + water and by selective stripping with another aqueous two-phase system formed by ammonium sulfate solution and PEG2000 phase loaded vanadium and molybdenum. …

This study aimed to introduce a comprehensive process for separating and recovering molybdenum from the roasted spent HDS catalysts. The brief flow of the …

Spent HDS catalyst is an important secondary resource for extracting molybdenum. This study aimed to introduce a comprehensive process for separating and recovering molybdenum from the roasted spent HDS catalysts. The brief flow of the novel technology contains pressure Na2CO3 liquor leaching, selective extraction of …

Ammonia nitrogen wastewater generated during the ammonia decomposition of molybdenum calcine causes serious environmental pollution. To address this issue, a novel acidic leaching–extraction–circulation process is proposed to efficiently extract molybdenum (Mo) from different molybdenum calcine components (MoO 2, MoO 3, …

A P204 (D2EHPA) diluted with sulfonated kerosene was used for the selective extraction of molybdenum from an acidic Ni–Mo ore leach solution that was …

The brief flow of the novel technology contains pressure Na2CO3 liquor leaching, selective extraction of molybdenum using N263, and circulating leaching of raffinate. The molybdenum in roasted ...

It is worth noting that a selective extraction could be achieved by the use of another IL extractant according to the stoichiometry presented in Eqs. (4), (5), (6) . For example, the IL ctylmethylammonium chloride [TOMA][Cl] or Aliquat 336 diluted in either kerosene or [omim][Tf2N] would extract Re(VII) exclusively at low pH (pH < 1).

In this paper the selective extraction of Mo(VI) and Re(VII) from a low pH synthetic leach liquor was studied. Extractions with the commercial extractant D2EHPA …

When molybdenum and vanadium enter into the organic phase by co-extraction by TOA or the mixed TOA/C272, its selective stripping is very important for their separation. It can be conclusive from Fig. 4 d that the mixed TOA/C272 can weaken the extraction of vanadium, potentially improving the Mo/ V separation by intermolecular …

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 …

The other set of gold adsorbents, for example, two-dimensional molybdenum disulphide 16,17,18, amyloid 19,20, cyclodextrin 21 and diamide 22, instead of relying on the porosity of the adsorbents ...

A selective extraction separation method for molybdenum and vanadium was established by using leaching solution of HDS spent catalyst. ... extraction of Mo decreased from 94.11% to 74.07%. When the oil–water ratio was 1/2, the molybdenum extraction rate reached 91.16%, while the extraction rate of vanadium is negligible; in …

Among the hydrometallurgical processes, solvent extraction was considered as an eficient method to recover molybdenum, it is widely used in practical pro- duction due to its …

In this work, nickel, molybdenum, and vanadium were selectively extracted from the spent hydroprocessing catalysts (Ni–Mo–V/Al 2 O 3) by using an integrated ammoniacal leaching and selective separation process.After roasted at 400 °C, molybdenum and nickel were selectively extracted by ammoniacal liquors at pH 9 in the …

Separation of tungsten (W) and vanadium (V) is of great significance for the utilization of the polymetallic complex minerals and secondary resources of these elements. In this work, selective extraction of V from sodium tungstate solution was investigated using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507) as an extractant.

We developed a process including acid leaching, solvent extraction and stripping in order to recycle spent catalyst. In this study, we conducted selective recovery of molybdenum …

Recovery of rare earth elements from deep-sea mud using acid leaching followed by selective solvent extraction with N1923 and TBP. 2023, Separation and Purification Technology ... Extraction of molybdenum and vanadium from the spent diesel exhaust catalyst by ammonia leaching method. Journal of Hazardous Materials, Volume …

A cold-induced-homogeneous liquid–liquid extraction method combined with deep eutectic solvent-based dispersive liquid–liquid microextraction has been done to extract several endocrine disrupting compounds (phenol, p-chlorophenol, p-nitrophenol, octylphenol, methyl paraben, ethyl paraben, butyl paraben, and bisphenol A) and …

San Diego: Academic Press, 2001: 1386. [2] COCA J, DIEZ F V, MORIS M A. Solvent extraction of molybdenum and tungsten by Alamine 336 and DEHPA [J]. ... Journal of Refractory Metals and Hard Materials, 2010, 28(4): 503âˆ'507. [6] NING Peng-ge, CAO Hong-bin, ZHANG Yi. Selective extraction and deep removal of tungsten from …

It is well known that the isopolyanions and heteropolyanions ions formed easily in the solution of tungsten and molybdenum. Baes and Mesmer [18] summarized the equilibrium involving MoO 4 2− or WO 4 2− protonation in the solution of Mo or W, respectively. Neková and Schrotterová drew the diagrams of Mo(VI)–OH − and …

The present study proposes an overall recycling process for spent hydrodesulfurization (HDS) catalysts. The process put together stages already known in the technical literature, tested again with samples coming from the roasting stage in a pilot kiln, which is the most limiting stage of metal recovery from spent catalysts. These catalysts …

In this work, a study on the selective solvent extraction (SX) of molybdenum (Mo) and rhenium (Re) from a synthetic pregnant leach solution (PLS) has been carried out using nine different hydrophobic eutectic solvents (HES).

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. ... Selective Extraction and Deep Removal of Tungsten From Sodium Molybdate Solution by Primary Amine N1923, Sep. Purif. Technol., 2009, …