Gallium Solvent Extraction - Metallurgist & Mineral Processing

2021. 2. 9. · 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

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Investigation of an Electrochemical Method for Separation of

The extraction of gallium and germanium from germanite,” Journal of the Chemical Society, pp. 1371–1373, 1937. View at: Google Scholar W. C. Sleppy and R. H. Goheen, “Process for electrolytic recovery of metallic gallium,” 1975.

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Maturation of a key resource - the germanium-68/gallium-68

(68)Ge/(68)Ga radionuclide generators have been investigated for almost fifty years, since the cyclotron-independent availability of positron emitting (68)Ga via the (68)Ge/(68)Ga system had always attracted researches working in basic nuclear chemistry as well as radiopharmaceutical chemistry. Howe

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Purification of production scale amounts of Ge-68 from

102 Objectives Germanium-68 (Ge-68) is produced by proton irradiation of a gallium metal target and purified by organic extraction with toluene or carbon tetrachloride. The Ge-68 is used in a medical isotope generator to produce Gallium-68 for PET imaging agents, such as 68Ga-DOTATOC. The organic solvents used to purify Ge-68 are considered Q3C class 1 & 2 by the FDA and the FDA recommends not

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The Russian-American Gallium Experiment

the germanium atoms produced in the gallium tanks. (See Figure 1.) About once a month, a chemical extraction is performed in which individual germanium-71 (71 Ge) atoms are plucked from among some 5 3 10 29 gallium atoms. (Only 1.2 71 Ge atoms are predicted to be produced per day in 30 tons of gallium, assuming the neutrino fl

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Germanium - Wikipedia

Germanium cluster anions (Zintl ions) such as Ge 42−, Ge 94−, Ge 92−, [ (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.

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Fast Coadsorption and Selective Separation of Gallium(III

In order to selectively separate and fast recover gallium(III) and germanium(IV), 3D hierarchical porous hoya-like α-FeOOH (3D-α-FeOOH) was obtained via a facile one-step synthesis process. Meanwhile, rod-shaped α-FeOOH and β-FeOOH were also prepared for systematically clarifying the excellent adsorption ability of 3D-α-FeOOH. The adsorption experiments indicated that the 3D-α-FeOOH

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Process for the recovery of gallium and germanium from coal

Report of Investigations 6940 of the United States Department of the Interior, Bureau of Mines, entitled "Extraction of Germanium and Gallium from Coal Fly Ash and Phosphorous Furnace Flue Dust" by R. F. Waters and H. Kenworthy (1967) describes the efforts of the Bureau of Mines to recover germanium and gallium.

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GERMANIUM SOLVENT EXTRACTION FROM SULFURIC ACID

2018. 11. 12. · 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.

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A Review on Germanium Resources and its Extraction by

gallium from primary sources such as bauxite, zinc ores and coals was reported by Frenzel, Ketris and Gutzmer (2014). However, information on the extraction/separation of germa- nium and gallium from zinc ores and coals is scarce.

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THE extraction and refining of germanium and gallium

In the 1940s the solvent extraction of gallium was firstly introduced to commercial operations during the recovery of germanium and gallium from the flue dust (Powell, 1954; Powell et al., 1951

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281. Gallium. Part II. The extraction of gallium and germanium

The extraction of gallium and germanium from germanite . F. Sebba and W. Pugh Abstract. The first page of this article is displayed as the abstract.

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NIOSHTIC-2 Publications Search - 10006856 - Optimization

The U.S. Bureau of Mines studied the extraction of gallium and germanium from hydrometallurgical zinc processing residues. Statistically designed experiments showed that the most significant variables were h2so4 concentration for gallium extraction and pulp- solids density for germanium extraction. Leaching the residue with 2,000 lb h2so4/st residue for 4.5 H at 80 deg. C using 20 pct pulp solids

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Gallium, Germanium, Indium, Vanadium, Or Molybdenum Produced

Gallium, Germanium, Indium, Vanadium, Or Molybdenum Produced Patents (Class 205/564) The method simplifies the process and improves extraction efficiency of

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Recovery of Gallium and Germanium from Hydrometallurgical

The occurrence relationship between Fe and Ga and Ge in the reduced iron powder obtained from zinc residue, was analyzed by chemical phase method. The results showed that the gallium and germanium contacted with the metallic iron to form an alloy mainly in a form of solid solution,therefore,physical methods couldn't separate iron from gallium and germanium.

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PDF) Gallium solvent extraction in hydrometallurgy: an

In general, M2EHPA and P2EHPA will extract gallium at much higher acidities than D2EHPA, which is ineffective at pH values below about 1.0.Tian Run-cang et al. [68 ] have described a series of solvent extraction steps, tested in continuous operation, for recovering indium, germanium and gallium from a sulphuric acid solution, containing about 0

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EP0265356B1 - Extraction of gallium from bayer solutions

EP0265356B1 EP87420285A EP87420285A EP0265356B1 EP 0265356 B1 EP0265356 B1 EP 0265356B1 EP 87420285 A EP87420285 A EP 87420285A EP 87420285 A EP87420285 A EP 87420285A EP 0265356 B1 EP0265356 B1 EP 0265356B1 Authority EP European Patent Office Prior art keywords resin gallium impregnated kelex sodium aluminate Prior art date 1986-10-24 Legal status (The legal status is an assumption and is not

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THE DEVELOPMENT AND IMPLEMENTATION OF INDUSTRIAL

cementation, solvent extraction, ion exchange, and electrowinning. Each area of testwork is identified below. The gallium was assumed to be a gallium oxide when testing started. 3.1. Alkaline Leaching Gallium is highly soluble within alkaline solutions and typically forms a gallate in the

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CN103468977A - Method for selectively leaching germanium

The invention relates to a method for selectively leaching germanium and gallium from complex smelting slag with the germanium and the gallium or ore with the germanium and the gallium, and belongs to the field of non-ferrous metal hydrometallurgy and secondary-resource recycling. The method for selectively leaching the germanium and the gallium from the complex smelting slag with the

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The Extraction of Gallium Chloride by Isopropyl Ether

Extraction of gallium from mixed acid solutions by tributyl phosphate and its application to activation analysis. https://doi.org/10.1007/BF02513899 M. Zangen, R. Rafaeloff. Some mixed complexes of gallium—II.

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The development and implementation of T industrial

2015. 5. 4. · gallium/germanium residue1,2. The gallium recovery processes used the following methods: An acid leach circuit to dissolve the gallium and germanium Conversion the leached iron from ferric to ferrous Recovery of the gallium with a solvent extraction approach Strip of the gallium from the solvent extraction chemical

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Gallium and germanium recovery from domestic sources - CORE

To recover gallium and germanium from the leach solutions, the solvent extractants octylphenyl acid phosphate (OPAP) (for gallium) and lix 63-OPAP (for germanium) were identified. These extractants were tested in separate, continuous, solvent- extraction circuits, yielding a gallium recovery of 94 pct and a germanium recovery of more than 90

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Germanium Properties, History and Applications

Jun 25, 2019 · Germanium substrates form one layer in multilayer systems that also use gallium, indium phosphide, and gallium arsenide. Such systems, known as concentrated photovoltaics (CPVs) due to their use of concentrating lenses that magnify the solar light before it is converted to energy, have high-efficiency levels but are more costly to manufacture

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Critical Mineral Commodities in Renewable Energy

GALLIUM Used in gallium-arsenide and copper-indium-gallium-diselenide thin-film solar cells. In 2018, the United States was 100% reliant on foreign sources for gallium. GERMANIUM Germanium-based solar cells are commonly used in satellites. In 2018, the United States was more than 50% reliant on foreign sources for germanium. Image Source: Rob

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Selective extraction of zinc, gallium, and germanium from zinc

2019. 1. 1. · In southern China, zinc sulfide concentrate with high gallium and germanium contents (>100 g/t) is produced from a lead and zinc mine (Liu et al., 2017a). The concentrate is treated by a two-stage countercurrent oxygen pressure leaching process.

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