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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction & Processing
Presentation Title Recovery of Germanium from Waste Optical Fibers by Solvent Extraction
Author(s) Bi-Cheng Chang, Wei-Sheng Chen
On-Site Speaker (Planned) Bi-Cheng Chang
Abstract Scope Germanium as main raw materials of optical fiber cables become more important in recent years. Due to the scarcity and importance of germanium, we developing an effective recycling processes of recovering germanium metal from waste fiber optic cables. The process was arranged to do pre-treatment, leach the fiber and extract the germanium from silicon. In the leaching step, we dissolve fiber by alkali fusion using sodium hydroxide. At the solvent extraction process, the pH value, concentration of extractant and stripping agents, organic-aqueous ratio and reaction time were considered. After leaching, germanium was extracted by trioctylamine to the organic phase and silicon was remained in the aqueous by controlling the conditions. After then, Germanium was then stripped by ammonia. With the optimal conditions, the recovery of germanium could be up to 99%. After separation, germanium could be recycled to back to the industrial effectively.
Proceedings Inclusion? Planned:

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Batch Studies for Removing Vanadium(V) and Chromium(VI) from Aqueous Solution Using Anion Exchange Resin
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Commercial Processes for the Extraction of Platinum Group Metals (PGMs)
Cyclone Electrowinning of Amtimony from Antimonic Gold Concentrate Ores
Effect of CaO Additive on the Interfacial Reaction between the BaZrO3 Refractory and Titanium Enrichment Melt
Effects of Preoxidation on the Kinetics of Iron Leaching from Ilmenite in Hydrochloric Acid Solution
Electrochemical and Spectroscopic Study of Eu(III)/Eu(II) Couple in the Ehtylmethylimidazolium Bis(trifluromethanesulfonyl)imide Ionic Liquid
Electrochemical Formation of Tb Alloys in Molten LiCl-KCl Eutectic Melts and Separation of Tb
Electrodeposition of γ-MnO2 from Manganese Nodule Leach Liquor: Surface Modification and Electrochemical Applications
Experimental Modeling of Nodulation in Copper Electrorefining
Extracting Uranium and Molybdenum from Refractory U-Mo Associated Ore
Extraction of Vanadium and Chromium from the Material Containing Chromium, Titanium and Vanadium
Extraction of Vanadium from Vanadium-containing APV-precipitated Wastewater by W/O Microemulsion System
Extraction Separation of V and Fe in High Acid and High Iron Solution
FEM Simulation of Nodulation in Copper Electrorefining
Microfluidic Solvent Extraction of Zinc from Low Concentration Sulfate Solution Using D2EHPA
Present Status and Development of Preparation Technologies of Titanium-rich Materials
Purification of a Nigerian Wolframite Ore for Improved Industrial Applications
Recovery of Lithium from Brine with MnO2 Nanowire Ion Sieve Composite
Recovery of Manganese from Scrap Batteries of Mobile Phones
Recovery of Valuable Metals from Waste Printed Circuit Boards by Using Iodine-Iodide Leaching and Precipitation
Review on the Processes for the Recovery of Rare Earth Metals (REMs) from Secondary Resources
Selective Oxidation of Cerium in Rare Earth Solutions, a Comparison of Four Oxidants
Selective Reduction and Separation of Europium from Mixed Rare-earth Oxides Recovered from Waste Fluorescent Lamp Phosphors
Study of the Mechanochemical Calcification for Mixed Rare Earth Concentrate
The Demonstration Pilot Plant Results for the Search Minerals Direction Extraction Process for Rare Earth Recovery
The Electrolytic Production of Rare Earths from their Oxides
The Management of Lead Concentrate Acquisition in “Trepca”
The Recovery of Cesium Salts from the Taron Deposit
Thermodynamic Study of Ga Extraction for Trace Element Analysis by ICP-MS
Thermodynamics Analysis on the Process of Decarburization and Vanadium Protection by CO2

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