Recovery of germanium from leach solutions of fly ash ...
In each extraction system, germanium was only extracted from a solution containing nickel, cadmium, cobalt, and zinc, which had a composition similar to gasification coal fly ash aqueous leach solutions.
germanium extraction from the coal fly ash by Arman ...
The first stage of the extraction of germanium - getting rich germanium concentrate (sometimes technical oxide or germanium tetrachloride). The concentrates obtained by various methods. Relevant shops usually have on metallurgical, coke, and so on Plants. The second stage - the production of high purity germanium.
Non-dispersive selective extraction of germanium from fly ...
Non-dispersive selective extraction of germanium from fly ash leachates using membrane-based processes Hossein Kamran Haghighi Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran , Mehdi Irannajad Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran Correspondence [email protected]
Business Chemistry | PhytoGerm: Extraction of germanium ...
Within the PhytoGerm project, a germanium extraction process based on the combination of leaching and distilling germanium with hydrochloric acid was developed. At the initial stage, fly ash is mixed with a hydrochloric acid (HCl) solution and germanium is extracted in the form of germanium tetrachloride (GeCl4) by distillation.
Recovery of Germanium from Coal Fly Ash Leachate by ...
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.
Ion flotation of germanium from fly ash aqueous leachates ...
Germanium is usually extracted with a pyrometallurgical route, this being followed by a separation process, such as distillation of germanium tetrachloride from 6 N HCl solution…
Non-dispersive selective extraction of germanium from fly ...
O/A =1/8, mass ratio of complexing agent to germanium 12-16, and at normal temperature,3-5 min.The optimum back extraction conditions are NaOH concentration 30%, O/A=2, and at normal temperature ...
Hydrometallurgical Recovery of Germanium from Coal ...
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 method.
Recovery of germanium from real fly ash leachates by ion ...
The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in the solution by ...
Commercial Recovery of Metals From Coal Fly Ash ...
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 coal-fired power plants.
Germanium separation and purification by leaching and ...
Sep 30, 2016 · 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.
Germanium and Gallium Extraction from Gasification Fly Ash ...
Germanium and gallium extraction tests To achieve a high and regular Ge and/or Ga extractable yield, regardless of the operational conditions of the IGCC plant , 8 extractants were sele cted: H 2 O, NaOH, HCl, ... Germanium and Gallium Extraction from Gasification Fly Ash: Optimisation for the Up-Scaling of a Recovery Process ...
Minerals | Free Full-Text | Demonstration Plant Equipment ...
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 and a consequent Ge separation from the other elements present in …
Germanium - Wikipedia
Germanium is a stone element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.
Germanium: Current and Novel Recovery Processes | IntechOpen
Germanium from coal combustion and gasification fly ashes Coal plays an essential role in our global energy scheme for power generation. There are 1,139,331 million tons of proven coal reserves worldwide, sufficient to meet 153 years of global production which makes coal a reliable source [ 59 , 60 ].
[PDF] Demonstration Plant Equipment Design and Scale-Up ...
The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in the solution by solvent extraction procedures.
Characterization and treatment of wastewater produced ...
The present work dealt with the characterization and treatment of liquid wastes produced during the hydrometallurgical recovery of germanium (Ge) from fly ash. The main metals causing reasons for environmental concern were arsenic (As), nickel (Ni) and... yielded a 97.5% removal of metals.
Hydrometallurgical recovery of germanium from coal ...
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.
Minerals 2015 OPEN ACCESS minerals
The solvent extraction (SX) method for the recovery of germanium from fly ash is based on the germanium-1, 2-dihydroxybenzene (catechol, CAT) (C 6 O 2 H 6 ) chelate and the subsequent extraction of the complex using tri- n -octylamine (TOA) ((C 8 H 17 ) 3 N) and stripping with alkaline solutions.