Subsequently, the aqueous phase's tungsten of 99.3% and vanadium of 98.1% were separated as calcium tungstate and ammonium metavanadate, respectively. In contrast, the residual solutions containing …

The present scientific study on uranium(VI) solvent extraction and vanadium(V) separation from sulfate solutions using Alamine 336 as an extractant diluted in kerosene was established.

A H2SO4–H2O2 system was developed to enhance the efficacy of vanadium extraction from roasted vanadium steel slag. The optimum parameters and the behavior of vanadium extraction were investigated systematically. When 1 mL of H2O2 per gram of vanadium slag was added to a leaching mixture at 50 °C, along with 30% H2SO4, 80.5% of …

Vanadium chemicals, known as the "vitamins of the modern industry," are major resources widely used in the petroleum, steel, batteries and catalyst industry. Vanadium is also essential in biological systems. Here we review vanadium properties, mineral sources and recovery methods such as blank, sodium and calcium roasting, …

The research on making vanadium titanium black porcelain from vanadium extraction tailings has been carried out by the institute of new materials, Shandong academy of sciences [].The reason why vanadium titanium black porcelain can be produced from vanadium extraction tailings is that the steel industry and ferroalloy …

The current mainstream extraction method is a combined process of aluminothermic reduction of vanadium oxide and electron beam smelting.

However, as was shown in Fig. 2, Cyanex 923 may be a suitable extractant candidate for separation of vanadium from iron because Cyanex 923 cannot extract iron (III). Since extraction of Fe (III) by Cyanex 923 was very low based on aqueous solution analysis, as a check the loaded organic solution was also analyzed for mass balance …

Vanadium products include three grades, vanadium slag and other vanadium extraction raw materials are primary vanadium products, vanadium oxides such as V 2 O 3, V 2 O 5 are secondary vanadium products, and alloys such as Fe V, Al V and metallic vanadium are tertiary vanadium products [20].At present, there have been …

The extraction of metal ions occurred in the order V(V) > Fe(III) > Al(III) > Mg(II) > K(I). Vanadium minimally existed as H 2 V 10 O 28 4-at pH 2.0, and the functional groups NH and C-N contributed to vanadium extraction using the extractant 7101. Four stages extraction and three stages of re-extraction were predicated by McCable-Thiele plots.

1. Introduction. Vanadium-bearing shale is an important vanadium resource in China. With the increasing demand for vanadium in the world, extracting vanadium from vanadium-bearing shale has become important research work [1], [2].The traditional extraction system using sulfuric acid has the disadvantages of poor selectivity, strong …

Stone coal; vanadium; leaching; separation; extraction Introduction Vanadium is an important by-product that is used almost exclusively in ferrous and non-ferrous alloys due to its physical properties such as tensile strength, hardness, and fatigue resistance (Moskalyk and Alfan-tazi 2003). China is rich in mineral resources of

The extraction and separation of vanadium(IV) and nickel(II) are divided into two stages: acid coleaching of vanadium and nickel and solvent extraction. In the acid coleaching stage, the leaching ...

The recovery of vanadium from sulfate leaching solutions is crucial for resource sustainability and environmental protection. However, the leaching solution contains impurities such as Fe (III), which have a significant impact on the separation and enrichment of V because a) the separation of Fe (III) and V (IV) through solvent …

Separation of vanadium, tungsten and molybdenum from spent SCR catalysts solution by solvent extraction with primary amine N1923 ... little pollution, and simple fabrication. In the literatures, many extractants have been reported to have good extraction separation for the two of three metals V, Mo, and W (Cao et al., 2021, Le …

Vanadium slag as the product after blast furnace ironmaking and vanadium oxidation in converter with vanadium-bearing titanomagnetite, is a main material for vanadium extraction [[6], [7], [8]]. With the large-scale utilization of the normal vanadium-bearing titanomagnetite with low chromium content, its reserves are decreasing every year.

The synergistic extraction mechanism was analyzed by slope method, and stripping experiment was also conducted. In addition, the characterization of leaching slag and a qualified high-titanium slag was prepared. This paper can provide a new reference for the extraction and separation of valuable metals in vanadium titanomagnetite …

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.

A method of roasting-free vanadium recovery from molten vanadium slag via pure oxygen oxidation-assisted acid leaching was investigated in order to implement efficient and green vanadium recovery. The oxidation process of molten vanadium slag discharged from converters by pure oxygen was simulated, and the phase evolution …

The solvent extraction behavior of vanadium (V) has been investigated using Cyanex 923 [trialkylphosphine oxide (TRPO)] in kerosene as an extractant. For comparison, extraction studies have also been carried out with vanadium (IV). The results demonstrate that vanadium (V) is extracted into the organic phase as VO 2 Cl·TRPO.

However, this high-temperature separation method has yet to attract attention in vanadium-chromium slag vanadium extraction. Hence, a compelling need is to investigate a new, cost-effective, streamlined approach for separating and extracting V and Cr from high-temperature heating V-Cr slag.

Furthermore, complete separation of vanadium and chromium can be realized, which is difficult to be achieved by sodium roasting-water leaching process (Fu et al., 2020; Wang et al., 2014; Wen et al., 2019b). Hence, calcification roasting process is considered to be a promising vanadium extraction process in the future.

The total vanadium and chromium leaching rates were above 95 pct, achieving the efficient separation and extraction of vanadium and chromium. The established method provides a new technique to ...

The vanadium leaching efficiency of 97.23 ± 0.31 pct was obtained under the maximum response conditions predicted by the proposed model. The pure oxygen …

At present, the main methods for vanadium separation and concentration are solvent extraction [14] [15] [16] and ion exchange 17,18 . The solvent extraction method, with various extracting ...

Compared with the ion exchange and chemical precipita-tion methods, solvent extraction is a more eficient method for separation and recovery of vanadium. In terms of vanadium …

New extractant and an extractant system are attractive for liquid-liquid extraction. To improve the extraction efficiency and selectivity, the binary extractant system consisting of bis-2-ethylhexyl phosphoric acid (D2EHPA) and 2-ethylhexylphosphonic mono-2-ethylhexyl (PC88A) was explored to separate vanadium …

Studies on the extraction and separation of vanadium(V) from mixed hydrochloric acid/ammonium thiocyanate solution with CYANEX 921 and CYANEX 925 in kerosene were carried out. The effects of ...

The extraction rate of molybdenum reached 91% and the extraction rate of vanadium was below 18% and the separation factor of both metals was above 47 under the optimal conditions of aqueous pH of ...

Here, we present a complexation-precipitation method to selectively recover pentavalent vanadium ions, V (V), from complex metal ion mixtures, using an …

Vanadium and chromium are important rare metals, leading to a focus on high chromium vanadium slag (HCVS) as a potential raw material to extract vanadium and chromium in China. In this work, a novel method based on selective two-stage roasting–leaching was proposed to separate and extract vanadium and chromium efficiently in HCVS. XRD, …

The solvent extraction behaviour of vanadium(V) from hydrochloric acid solutions has been investigated using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (EHEHPA=HX) in kerosene as an extractant. For comparison, extraction studies have also been carried out with vanadium(IV). The results demonstrate that the extraction of …

In the present study, solvent extraction has been used for extraction and separation of vanadium and nickel from sulfate solution. As a commercial extractant, D2EHPA has been used for extracting nickel and vanadium, despite the fact that D2EHPA has a co-extraction property [16], [19], [22], [24], [25], [46]. Therefore, using sole …

The initial vanadium concentration in the aqueous phase can induce the changes in the vanadium extraction efficiency. Kasikov et al. [45] have reported a sharp decrease in the extraction of vanadium from a solution with pH 2.5, when the initial V(V) concentration increased from 500 mg/l to 2000 mg/l. They have attributed that reduction …

The separation of Re(VII) and V(V) by solvent extraction with TBP was investigated by varying the HCl, metal and chloride ion concentrations. Re(VII) was selectively extracted over V(V) from the HCl solution. The highest separation between Re(VII) and V(V) occurred at a concentration of 2.0 M HCl. The extraction reaction of …

The extraction efficiency of vanadium remained more than 75% with the increase of the pH value, which can realize the selective extraction and separation of vanadium by using N1923 from iron, aluminum, calcium, sodium, and potassium in …

The extraction of vanadium was maximum at pH 2.8, 41.5 °C, and 7.8 × 10 −4 M concentration of aqueous vanadium. The ammine extractant Aliquat 336 has also been extensively used by different authors for extraction of vanadium. The extraction of vanadium from both acidic and alkaline media was studied with Aliquat 336 [11]. The …

The processes of vanadium extraction, separation and recovery from spent de-sulfurization catalyst bio-leach liquor solutions were studied. Spent catalyst processing has mainly two benefits: to ...

In order to extract vanadium in vanadium slag, the vanadium extraction technologies from the variation of the valence state of vanadium are divided into three categories: …

The strengthening technology of vanadium extraction from steel slag is prospected. Abstract. ... Efficient extraction and separation of vanadium and chromium in high chromium vanadium slag by sodium salt roasting-(NH 4) 2 SO 4 leaching. J. Ind. Eng. Chem., 71 (2019), pp. 327-335.

At present, sodium salt roasting is the most commonly used technology for vanadium extraction from ordinary vanadium slag with lower chromium, [ 8] which includes the …