The Extraction of Gallium from Zinc Ores - CaltechTHESIS
The discovery of small amounts of gallium in zinc ores showed the possibility of its presence in a small quantity of zinc ore residues on hand at the Institute. Germanium had been previously extracted from the ore, and later, part of the zinc was recovered. During this work, the presence of gallium was shown by spectroscopic tests, and indium was at the same time shown to be absent.

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Solvent Extraction and Ion Exchange - tandfonline.com
Mar 30, 2007· A continuous solvent extraction circuit was operated for over 150 hr, extracting over 90% of the germanium from 0.30 g/L Ge filtrates containing 40 to 60 g/L free acid. Over 90% of the loaded germanium was stripped from the organic phase with water at 75 °C. A section on germanium and gallium co-extraction is also presented.
Extraction of Glycyrrhizic Acid and Glabridin from Licorice
Apr 16, 2008· The extraction and separation conditions of glycyrrhizic acid and glabridin from licorice were investigated. By changing the different extraction solvents, procedures, times and temperature, the optimum extraction condition was established: the used of ethanol/water (30:70, v/v) as an extraction solvent, and 60 min dipping time under 50°C.
Selective Separation and Preconcentration of trace Amounts ...
Selective Separation and Preconcentration of trace Amounts of Gallium in Water and Rice Samples using Cloud Point Extraction and Determination by Inductively Coupled Plasma-Atomic Emission Spectrometry Asadollah Beiraghi* and Mina Roshdi Faculty of Chemistry, Kharazmi University, Mofatteh Avenue, No. 49, P.O. Box 15614, Tehran, Iran
Liquid–liquid extraction and recovery of gallium(III) from ...
1 Liquid–liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore SANDIP V. MAHAMUNI1, PRAKASH P. WADGAONKAR2 and MANSING A. ANUSE1* 1 Analytical Chemistry Laboratory, Department of Chemistry, Shivaji University, Kolhapur – 416 004, India and 2 Polymer Science and Engineering Division, National
Extraction chromatography of aluminium (III) and mutual ...
A selective method has been developed for the extraction chromatography of aluminium (III) and its separation from several metal ions with a chromatographic column containing N-n-octylaniline (a liquid anion exchanger) coated on silanized silica gel as a stationary phase.
Homogeneous Liquid–Liquid Extraction of Metal Ions with a ...
The system is efficient for the extraction of trivalent rare-earth, indium and gallium ions. This new type of metal extraction system avoids problems associated with the use of viscous ionic liquids, namely, the difficulty of intense mixing of the aqueous and ionic liquid phases by stirring.
Resources and extraction of gallium: A review - ScienceDirect
Eight fly ash samples were collected for Ga extraction tests, in which the Ga content ranged from 149 to 320 ppm. The optimal Ga extraction conditions were as follows: 25 °C, 0.7–1 M of NaOH, L/S ratio of 5 L/kg and 6 h. A Ga leaching rate of approximately 60–86% was obtained.
(PDF) ExtractionAndSeparationOfGaIII
PDF | Abstract Solvent extraction of Ga(III) from hydrochloric acid solution using CYANEX 921 in sulfonated kerosene as a modified diluent has been discussed. The factors affecting the extraction ...
Extraction and separation studies of Ga(III), In(III) and ...
dure for the separation of Ga(III), In(III) and Tl(III) from each other was developed. Keywords: solvent extraction, Cyanex-923, Ga(III), In(III), Tl(III), stripping, separation. INTRODUCTION Gallium is mainly used in the electronic industry for the manufacturing of gallium ar -
US4759917A - Oxidative dissolution of gallium arsenide and ...
Gallium is recovered from gallium arsenide by reacting and dissolving the gallium arsenide with an oxidant and a complexing agent, especially with water insoluble hydroxamic acids with mild conditions, e.g. with aqueous hydrogen peroxide and mild temperature, to effect separation of gallium hydroxamic acid chelates from water soluble arsenic compounds.
Solid phase extraction, preconcentration and separation of ...
Extraction and separation of gallium, indium and Portanova, R., Lajunen, L.H.J., Tolazzi, M., Piispanen, J., 2003. Evaluation of stability thallium with several carboxylic acids from chloride media. Talanta 59, constants for hydroxycarboxylic acid complexes with protons and metal Ions 905–912. Related Papers. Adsorption, preconcentration and ...
Application of ultrasound in solvent extraction of nickel ...
The effects of ultrasound on the rate of solvent extraction of nickel with Lix 65N and Lix 70, and gallium with Kelex 100 were investigated. These solvent extraction systems are noted by their sluggish nature. Low frequency (20 kHz) ultrasound increased the rates of extraction of nickel by factors of four to seven. The ultrasound had no effect on the final chemical equilibrium.
Oxidative dissolution of gallium arsenide and separation ...
Sep 28, 1988· Gallium is recovered from gallium arsenide by reacting and dissolving the gallium arsenide with an oxidant and a complexing agent, especially with water insoluble hydroxamic acids with mild conditions, e.g. with aqueous hydrogen peroxide and mild temperature, to effect separation of gallium hydroxamic acid chelates from water soluble arsenic compounds.
Extraction of gallium, indium and thallium ... - SpringerLink
Nishihama S, Hirai T, Komasawa I (1999) Separation and recovery of gallium and indium from simulated zinc refinery residue by liquid–liquid extraction. Ind Eng …
Extraction of gallium(III) and aluminium(III) with O,O ...
The extraction of Ga 3+ and Al 3+ with the liquid cation-exchangers di-n-butyldithiophosphoric acid (DBTPA) and di-(2-ethylhexyl)dithiophosphoric acid (DETPA) in kerosene, in the presence and absence of alcohols and tri-n-butyl phosphate (TBP) has been studied. Both Ga 3+ and Al 3+ can be extracted in the form of a neutral complex, MA 3, but the distribution coefficient of Ga 3+ is the higher ...
Evaluation of Materials for the Separation of Germanium ...
Evaluation of Materials for the Separation of Germanium from Gallium, Zinc and Cobalt 465 volume) and the fractionated (6 × 2 mL) 0.1 M HCl elutions. In the five methods the mass of each metal was determined in each 2 mL HCl fraction, the masses summed for the HCl fractions, and the concentration determined for the entire HCl elution (12 mL). 3.
Separation and Recovery of Gallium and Indium from ...
The separation and recovery of gallium and indium from zinc refinery residue, using liquid−liquid extraction, has been investigated. The major components with the exception of zinc can be removed by extraction with tri-n-butyl phosphate at low aqueous acidity, and gallium and indium can be separated from the remaining major component, zinc, by extraction with bis(2-ethylhexyl)phosphoric acid ...
Extraction and separation of Ga(III) from hydrochloric ...
The factors affecting the extraction of gallium have been investigated. The sulfonation of kerosene was found to enhance the separation of gallium from the interfering ions …
Extraction and Separation of Gallium and Indium from ...
Extraction and Separation of Gallium and Indium from Aqueous Chloride Solution Using Several Organophosphorus Compounds as Extradants Article in Journal of …
Separation and recovery of gallium(III) ions from aqueous ...
concentration of H+, Cl , metal, and extractant on the extraction of Ga(III) was investigated. In addition to this, separation studies were carried out in the presence of metal ions commonly associated with gallium, tested with leach liquors of waste photodiodes. 2. Results and discussion 2.1. Liquid{liquid extraction of Ga(III) using Cyphos IL 101
EP0283740A2 - Oxidative dissolution of gallium arsenide ...
Gallium is recovered from gallium arsenide by reacting and dissolving the gallium arsenide with an oxidant and a com­plexing agent, especially with water insoluble hydroxamic acids with mild conditions, e.g. with aqueous hydrogen peroxide and mild temperature, to effect separation of gallium hydroxamic acid chelates from water soluble arsenic compounds.
Preferential extraction of gallium from Bayer liquor using ...
Vanadium extraction kinetics were slower than those of gallium. The gallium and vanadium separation efficiency increased with decreasing contact time with extractions of 64% and 32% respectively after 1 min. Gallium extraction was independent of alkali concentration up to 250 g dm −3 and thereafter decreased with increasing alkali ...
Solvent extraction separation of gallium, indium and ...
A novel method is proposed for the solvent extraction separation of aluminium, gallium, indium, thallium(I) and thallium(III). Gallium was quantitatively extracted from 0.01 citric acid between pH 2.0 and 3.5 with 0.1 Amberlite LA-2 in xylene, stripped with 0.5 hydrochloric acid and determined spectrophotometric
Gallium Solvent Extraction - 911metallurgist.com
Recently, details of a study optimizing gallium and germanium extraction from zinc residues using H2SO4 leaches was published. In the process, filtrates containing gallium and germanium along with other impurities such as iron, copper, zinc, and cadmium are produced. The focus of this paper is the recovery of gallium from these solutions. It has been reported that in an H2SO4 system, di(2 ...
Processing to obtain high-purity gallium | SpringerLink
A. Leveque and J. Helgorsky, “The Recovery of Gallium from Bayer Process Aluminate Solutions by Liquid-Liquid Extraction,” Proceedings of the International Solvent Extraction Conference 77, Volume 21 (Montreal, Canada: Canadian Institute of Mining and Metallurgy, 1979), pp. 439–442. Google Scholar
Liquid–liquid extraction and recovery of gallium(III) from ...
1100 MAHAMUNI, WADGAONKAR and ANUSE material.1–3 Hence, the separation of gallium from aluminium is of practical importance. The earliest applications of solvent extraction of gallium were in analytical procedures established before a significant commercial demand for this metal
THE extraction and refining of germanium and gallium ...
Gallium is recovered from the acid liquor in the first still by treatment with aluminium to remove heavy metals and to reduce the iron to ferrous chloride, followed by extraction of the gallium chloride in a continuous process with isopropyl ether, removal of the ether by distillation, purification of the aqueous phase with hydrogen sulphide ...
Extraction and separation of gallium, indium and thallium ...
Apr 10, 2003· In this paper, we compared the extraction of gallium (III), indium (III) and thallium (III) with CA-12, CA-100 and NA. Studied the effects of initial pH, concentrations of extractants, stripping agents and foreign ions. Proposed a method for the extraction and individual separation of trivalent gallium, indium and thallium with CA-12.
Extraction Processes for Gallium and Germanium: Mineral ...
Apr 27, 2007· The present article provides information on uses, mineral resources and production methods of gallium and germanium. Both of these metals are used in advanced technology. Gallium is mainly used in the production of high-speed computer chips (integrated circuits) and optoelectronic devices. Germanium is employed as semiconductor in electronics and infrared optic industries.
Extraction and separation studies of Ga(III), In(III) and ...
The neutral extractant, Cyanes-923 has been used for the extraction and separation of gallium(III), indium(III) and thallium(III) from acidic solution. These metal ions were found to be quantitatively extracted with Cyanex-923 in toluene in the pH range 4.55.5, 5.06.5 and 1.53.0, respectively, and from the organic phase they can be stripped ...
Photometric determination of gallium in silicate rocks ...
A procedure was developed for the determination of gallium in silicate rocks. It is based on the extraction of gallium by a chloroform solution of a crown ether, 18-crown-6, followed by photometric determination using an improved Rhodamine B method. Gallium was determined in many Geological Survey of Japan rock ref
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