germanium fly flotation

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In short, this research developed a practical and environment-friendly one-pot synthesis to recycle germanium in coal fly ash and prepare GeAs ultrafine particles …

The solvent extraction of germanium and some heavy metals by commercial tri-octyl/decyl amine (Alamine 336), N-methyl-N, N-dioctyl chloride (Aliquat 336) and phosphine oxide (Cyanex 923) has been studied.In each extraction system, germanium was only extracted from a solution containing nickel, cadmium, cobalt, and zinc, which …

Precipitation of Germanium from Coal Fly Ash Leachates. Fátima arroyo. 2010, Coal Combustion and Gasification Products. See Full PDF Download PDF.

(2019). Non-dispersive selective extraction of germanium from fly ash leachates using membrane-based processes. Separation Science and Technology: Vol. 54, No. 17, pp. 2879-2894.

germanium from aqueous leachate by means of ion flotation, using a complexating agent and a surfactant as collector. The use of different ligands with dodecylamine as collector …

Semantic Scholar extracted view of "Spent-medium leaching of germanium, vanadium and lithium from coal fly ash with biogenic carboxylic acids and comparison with chemical leaching" by Homa Rezaei et al. ... Flotation separation of coal from its inorganic part (ash) can reduce environmental problems of coal consumption and improve …

A germanium-rich coal fly ash from Inner Mongolia province in China was chosen as a sample in this experiment. The XRF analysis results of germanium-rich coal fly ash were shown in Table 1, which showed the main chemical composition for the coal fly ash sample. ... Ion flotation of germanium from fly ash aqueous leachates. Chem. Eng. …

Ion flotation of germanium from fly ash aqueous leachates. Ion flotation of germanium from fly ash aqueous leachates. J. Chimenos. 2006, Chemical Engineering Journal. See Full PDF Download PDF.

Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant (200 kg of fly ash/h). The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching …

This article is concerned with a simple hydrometallurgical method for the selective recovery of germanium from fly ash (FA) generated in an integrated gasification with combined cycle (IGCC) process. The method is based on the leaching of FA with water and a subsequent concentration and selective separation of germanium by a solvent …

The germanium - together with other metals and metalloids contained in the fly ash generated in the Integrated Gasification in Combined Cycle (IGCC) of Elcogas plant (Puertollano, Spain) - may be extracted by aqueous leaching. Here we report the study of the selective recovery of germanium from aqueous leachate by means of ion flotation, …

Ion flotation of germanium from fly ash aqueous leachates. Chemical Engineering Journal 118 (1–2), 69–75, doi: …

(b) The complete hydrometallurgical process for the recovery of germanium from IGCC fly ash proposed may be summarised as follows: (a) extraction of germanium from IGCC fly ash at 90 C with a water/fly ash ratio of 5 L/kg and 6 h extraction time using pure water, (b) optional subsequent enrichment by AAC or SX method (HCl media), and (c ...

This is because germanium hardly forms its own minerals in nature. Natural germanium resources usually exist in minerals such as germanium–zinc ore and coal, which are recovered as byproducts of zinc smelting and fly ash. Germanium in sphalerite mainly occurs as a substitute for zinc, replacing zinc in sphalerite in an isostructural form …

Using the above-mentioned optimal conditions, the total germanium recovery from IGCC fly ash yielded 50–62%, enabling a theoretical production of 3500 …

In this study the purity of the germanium end-products obtained by two different precipitation methods carried out on germanium-bearing solutions was evaluated as a last step of a hydrometallurgy process for the recovery of this valuable element from the Puertollano Integrated Gasification Combined Cycle (IGCC) fly ash. Since H 2 S is …

Ion flotation of germanium from fly ash aqueous leachates. Ion flotation of germanium from fly ash aqueous leachates. Oriol Font. 2006, Chemical Engineering Journal. See Full PDF Download PDF.

Germanium form fly ash leachates and catechol forms a complex. Ge- complex can be retained on to conventional anionic resin (215.5 mg of Ge/g of resin. Elution was achieved with acid solutions in an ethanol matrix. ... Ion flotation of germanium from fly ash aqueous leachates. Chemical Engineering Journal, 118 (1) (2006), pp. 69-75. …

Here we report the study of the selective recovery of germanium from aqueous leachate by means of ion flotation, using a complexating agent and a surfactant as collector. The use of different ligands with dodecylamine as collector and the effect of …

Characterization and treatment of wastewater produced during the hydro-metallurgical extraction of germanium from fly ash

Germanium (Ge) is considered a critical element due to its many industrial applications; Ge is a metalloid used in solar cells, fiber optics, metallurgy, chemotherapy, and polymerization catalysis. The …

Three variables affecting the precipitation of the germanium 2009), ion-flotation (Herna´ndez-Expo´sito et al., 2006), solvent contained in leachates were included in the optimization study: the extraction (Arroyo …

Various forms of germanium have extensive applica-tions. It can be used in photodetectors (pure form), high refraction glass (as GeO 2), etc. Since the chemical purity of germanium is essential in its application, the recovery, separation, and purification of germanium is a significant issue. Fly ashes and zinc ores are the main resources of ...

Germanium occurs in relatively high concentrations in a number of coal basins and it is usually concentrated in coal combustion/gasification fly ashes that can …

Keywords: Germanium; Hydrometallurgical extraction; Fly ash; Arsenic 1. Introduction Fly ash is the finest coal combustion residue (0.2–90 micrometers) formed due to the transfor- mation of mineral matter present in coal particles during combustion [1]. Approximatelly 350 mil- lion tonnes of fly ash were produced worldwide in 2000 [2].

The primary sources of worldwide germanium production are Zn-refinery residue and coal fly ash, with recycling of industrial scraps being the secondary source [12].Globally, the main producer of germanium is China, accounting for 80% of world production during 2012–2016 [7].Other producers are Russia, Finland, US, Japan, and …

Germanium occurs in relatively high concentrations in a number of coal basins and it is usually concentrated in coal combustion/gasification fly ashes that can enrich germanium 10 times higher ...

Germanium and gallium occur in relatively high contents in the fly ash (FA) produced in the Puertollano (Spain) Integrated Gasification Combined Cycle (IGCC) …

DOI: 10.1016/J.CEJ.2006.01.012 Corpus ID: 97787123; Ion flotation of germanium from fly ash aqueous leachates @article{HernndezExpsito2006IonFO, title={Ion flotation of …

germanium recovery process from f ly ashes, culminating in a commercial Ge end-product. The research on the extraction of germanium with water from the Puertollano IGCC fly ash 16 revealed that relatively high extraction yields (up to 86%) were obtained using pure water. These promising r esults conducted research towards the study of ...