germanium fly extraction

Germanium Fly Extraction

Recovery of germanium from leach solutions of fly …

Recovery of germanium from leach solutions of fly ash using solvent extraction with various extractants. ... The germanium extraction efficiency approached 100% when the Alamine 336 concentration ... C. Fernández-PereiraHydrometallurgical recovery of germanium from coal gasification fly ash. Solvent extraction method. Ind. Eng. Chem. Res., 47 ...

Recovery of Germanium from Coal Fly Ash Leachate by ...

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 ...

germanium extraction from the coal fly ash by …

Germanium is a semiconductor, hard, and crystalline element. Germanium is found in the earths crust in an abundance of 1-7 ppm and concentrated in very few minerals such as argyrodite, germanite, or renierite. Some Ag, Sn, Cu, Fe, and especially Zn ores, contain germanium and

Germanium and Gallium Extraction from Gasification Fly Ash ...

extraction yields obtained i n these early extraction tests, the research was currently directed towards the optimisation of the extraction procedure by investigating the extraction (simultaneous if possible) of both elements to obtain high extraction yields regardless of the fly ash and operational conditions of the IGCC plant . A number of

Recovery of germanium from real fly ash leachates …

Germanium recovery from real fly ash (FA) leachates was studied using ion-exchange procedures. The procedure was based on germanium complexation with catechol (CAT) in an aqueous solution followed by the retention of the Ge–CAT complex onto a conventional strongly basic anionic resin (IRA-900).

Hydrometallurgical Recovery of Germanium from …

1-5-2008 · 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 ...

Germanium and Gallium Extraction from …

In this article, a hydrometallurgical method for the selective recovery of germanium from fly ash (FA) has been tested at pilot plant scale. The pilot plant flowsheet comprised a first stage of water leaching of FA, and a subsequent selective recovery of the germanium from the leachate by solvent extraction method.

Germanium separation and purification by leaching …

30-9-2016 · Abstract. In this research work, extraction and purification of germanium from zinc leach residues (ZLR) were investigated. The results of ICP, XRF, and atomic adsorption spectroscopy (AAS) tests show that contents of germanium, iron, lead, and zinc within the leaching residue were 105×10 −6, 3.53%, 10.35%, and 8.8%, respectively.

Ge extraction from gasification fly ash | Request PDF

Ge extraction from gasification fly ash. ... (85%). A high-purity germanium solution was obtained. Experimental data presented in this work show that the extraction of germanium by the solvent method designed can be selective toward germanium, and this element can be effectively separated from arsenic, molybdenum, nickel, ...

germanium gallium extraction - …

Vanadium and silver extraction from enriched coal sources dates back to the 1800s, and germanium extraction is still active by companies such as Umicore. 1 When coal is combusted, some valuable components can be found in the fly ash captured by the electrostatic precipitators and/or fabric filters commonly applied at coalfired power plants.

Germanium - Wikipedia

Germanium cluster anions (Zintl ions) such as Ge 4 2−, Ge 9 4−, Ge 9 2−, [(Ge 9) 2] 6− have been prepared by the extraction from alloys containing alkali metals and germanium in liquid ammonia in the presence of ethylenediamine or a cryptand. The oxidation states of the element in these ions are not integers—similar to the ozonides O ...

Extraction of germanium(IV) from acid ... - …

10-7-2013 · Solvent extraction experiments were conducted from acidic solutions containing germanium(IV) and other metal ions, such as Ga 3+, Fe 3+, Zn 2+ and Fe 2+ in hydrometallurgical process of zinc. The purpose of this work was to enhance the efficiency of the extraction and stripping processes and the selectivity of germanium and other metals, while making the method as simple as …

Hydrometallurgical Recovery of Germanium from …

In this article, a hydrometallurgical method for the selective recovery of germanium from fly ash (FA) has been tested at pilot plant scale. The pilot plant flowsheet comprised a first stage of water leaching of FA, and a subsequent selective recovery of the germanium from the leachate by solvent extraction method. The solvent extraction method ...

Business Chemistry | PhytoGerm: Extraction of …

3.2 Germanium extraction process introduced by Arroyo et al. (2011) Arroyo et al. (2011) describes a solvent extraction method for recovering germanium from coal fly ashes. The process is based on numerous steps beginning with the leaching of fly ash with water.

germanium gallium leaching - tambinh.nl

Germanium Gallium Ore Leaching with Sulfuric Acid. For optimum gallium and germanium extraction, a twostage countercurrent leach system was devised to adequately control the solution acidity. At operating conditions of 1,000 kg H2SO4/mt ore, 20 % solids, and 90 °C, 96% of the gallium and 85% of the germanium in the ore were extracted. Get Price

Process for the recovery of gallium and germanium …

A method is disclosed for recovering gallium and/or germanium from fly ash which comprises pelletizing the fly ash, treating the pellets in the presence of an oxidizing gas at a temperature of from about 900.degree. C. to just below the fusion temperature of the pellets, treating the pellets in the presence of a reducing gas at the same ...

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