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.
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]
Hydrometallurgical Recovery of Germanium from Coal ...
Mar 22, 2008 · 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, antimony, vanadium, and zinc. Hydrometallurgical Recovery of Germanium from Coal Gasification Fly Ash.
germanium fly flotation
germanium ore extraction plant Arsenic and antimony removal by oxidative aqueous leaching of IGCC fly ash during germanium extraction. Previous research on the extraction of Ge from Puertollano IGCC plant fly ash demonstrated that high Ge extraction yields (up to …
PhytoGerm: Extraction of germanium from biomass - An ...
Most of the germanium is recovered as a by-product during zinc extraction. In a few instances, the metalloid has been extracted in copper smelters and from the fly ash of coal burning power plants (Melcher et al., 2014). Over the past six years, the worldwide production of germanium increased from 118 t to 153 t in 2013 (figure 1).
(PDF) Recovery of germanium from leach solutions of fly ...
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
Recovery of germanium from real fly ash leachates by ion ...
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 Coal ...
The solvent extraction method was based on germanium complexation with catechol (CAT) in an aqueous solution followed by the extraction of the Ge−CAT complex with an extracting organic reagent diluted in an organic solvent.
Ge extraction from gasification fly ash | Request PDF
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 ...
Characterization and treatment of wastewater produced ...
Hydrometallurgical extraction (1) 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.
germanium extraction from the coal fly ash by Arman ...
Monday, December 7, 2015 Germanium in the coal fly ash In recent years its practiced a new way of producing germanium Methods of Germanium extraction Germanium is a semiconductor, hard, and crystalline element. Germanium is found in the earths crust in an abundance of 1-7 ppm
Germanium and Gallium Extraction from Gasification Fly Ash ...
Puertollano IGCC fly ash, a sequential extraction procedure based on a starting water leach ing step for the extraction of Ge and subsequent alkaline leaching ( NaOH -based extractant) of the resulting solid residue for the extraction of Ga, was designed.
Industrial Equipment Design for the Recovery of Germanium ...
Germanium recovery from coal fly ash (FA) leachates by solvent extraction procedures was studied. Tests at pilot plant scale were performed in order to design industrial equipment. Based on the experimental results, mass balances and McCabe-Thiele diagrams were applied to determine the number of steps of the SX stage.
Non-dispersive selective extraction of germanium from fly ...
Gasification coal fly ashes (GCFAs) containing germanium can be leached with water to dissolve germanium as water-soluble species.
Demonstration Plant Equipment Design and Scale-Up from ...
The pilot plant comprised two main stages: germanium extraction from FA (leaching with water) and separation of germanium from other elements dissolved in the leachate (L) (interferences). After water leaching, wet fly ash and leachate are separated in a vacuum filter.
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.
Minerals | Free Full-Text | Demonstration Plant Equipment ...
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.
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.