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  • Gallium Solvent Extraction

    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 ...

  • Extraction Processes for Gallium and Germanium: Mineral ...

    Gallium is conventionally obtained as a byproduct of aluminum, and germanium as byproduct of zinc processing. An exception to this rule is the Apex Mine ore which has served as the only primary source in the world for direct production of gallium and germanium.

  • Cited by: 18
  • Germanium Gallium Ore Leaching with Sulfuric Acid

    For optimum gallium and germanium extraction, a two-stage counter-current leach system was devised to adequately control the solution acidity. At operating conditions of 1,000 kg H2SO4/mt ore, 20 % solids, and 90 °C, 96% of the gallium and 85% of the germanium in the ore were extracted.

  • Extraction of gallium and germanium from zinc refinery ...

    The gallium and germanium in the zinc refinery residue mainly exist as dissociative or combined oxides that correlate with iron and silica. (2) The leaching of both gallium and germanium increase with increasing sulfuric acid concentration up to 156 g L − 1 with ratios of 90.83% and 65.06%, respectively. Further increases in the sulfuric acid ...

  • Cited by: 25
  • Gallium Price, Occurrence, Extraction, Use Institute for ...

    Gallium is a rare element on Earth, with a content of 19 ppm in the continental crust, its abundance is comparable to that of lithium and lead. It does not occur elementarily, but only bound, predominantly in aluminum, zinc or Germanium ores. The gallium richest

  • 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, H 2 SO 4, H 2 O 2, lime, oxalic acid (H 2 C 2 O 4) and catechol (C 6

  • Gallium - Wikipedia

    OverviewPhysical propertiesChemical propertiesHistoryOccurrenceProduction and availabilityApplicationsPrecautions

    Gallium is a chemical element with the symbol Ga and atomic number 31. Elemental gallium is a soft, silvery metal at standard temperature and pressure; however in its liquid state it becomes silvery white. If too much force is applied, the gallium may fracture conchoidally. It is in group 13 of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and thallium. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. E

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  • Heavy metals - Wikipedia

    Heavy metals are generally defined as metals with relatively high densities, atomic weights, or atomic numbers.The criteria used, and whether metalloids are included, vary depending on the author and context. In metallurgy, for example, a heavy metal may be defined on the basis of density, whereas in physics the distinguishing criterion might be atomic number, while a chemist would likely be ...

  • Processing to obtain high-purity gallium SpringerLink

    H. Jiang et al., “Kinetics of Gallium and Germanium Extraction from a Complex Ore by H 2 SO 4-Na 2 S 2 O 3 Leachants,” Precious and Rare Metal Technologies, ed. A.E. Torma and I.H. Gundiler (New York: Elsevier, 1989), pp. 547–565. Google Scholar

  • CADMIUM, GALLIUM, GERMANIUM RESOURCES VIRGINIA

    extraction of gallium increased to over 95 percent while ger- manium extraction reached a peak of 71 percent after which it decreased to less then 50 percent. The percentage of in- crease of germanium extraction is low because some of the ore is locked in quartz, where it can not be attacked and leached by the acid. The mine has not reopened.

  • CADMIUM, GALLIUM, GERMANIUM RESOURCES VIRGINIA

    extraction of gallium increased to over 95 percent while ger- manium extraction reached a peak of 71 percent after which it decreased to less then 50 percent. The percentage of in- crease of germanium extraction is low because some of the ore is locked in quartz, where it can not be attacked and leached by the acid. The mine has not reopened.

  • Recovery and separation of gallium(III) and germanium(IV ...

    In this research, gallium and germanium were separated and recovered from zinc refinery residues by a two-stage leaching. In the first leaching stage with sulfuric acid media, 92% of zinc and 94% of copper were leached resulting in significant gallium and germanium enrichment up to ca. 300%.

  • Extraction of gallium and germanium from zinc refinery ...

    Request PDF Extraction of gallium and germanium from zinc refinery residues by pressure acid leaching Pressure acid leaching of zinc refinery residues containing 0.266 wt.% Ga and 0.363 wt ...

  • The development and implementation of T industrial ...

    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

  • EP0046437B1 - Procédé d'extraction sélective du germanium ...

    germanium extraction elution extractant solution Prior art date 1980-08-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Application number EP81401313A Other languages German (de) English (en)

  • 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.

  • Recovering in, Ge and Ga from zinc residues SpringerLink

    A novel solvent extraction process has been developed to selectively recover indium, germanium and gallium from the cement residue sulfuric acid leach solutions in a hydrometallurgical zinc plant. The key work was to determine a special organic molecule for gallium and germanium extraction. Continuous countercurrent tests on the mini-pilot plant level were performed successfully with 90.7%, 94 ...

  • RI 9419 REPORT OF INVESTIGATIONS/1992 r--------

    Effect of H2S04 concentration on metal extraction from gallium-germanium ore ..... . Effect of leach temperature on metal extraction from gallium-germanium ore ..... . Effect of leach time at various acid concentrations on metal extraction from gallium-germanium ore .. .

  • 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 characterised method according Prior art date 1986-10-24 Legal

  • Global Substance Flow Analysis of Gallium, Germanium, and ...

    Apr 22, 2015  Summary This study provides a global substance flow analysis for gallium (Ga), germanium (Ge), and indium (In) for 2011, quantifying the amount of metal lost during extraction, beneficiation/smelti...

  • 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.

  • In ...

  • Mining And Processing Gallium

    Mining - Kazakhstan - For Australian Exporters - The mining industry in kazakhstan is focused mainly on extraction and export of raw materials and base metals, with further high-value processing abroad. about 80 per cent of mining products are exported representing 20 per cent of the country’s total exports. kazakhstan will remain an important center for iron ore mining in the near term.

  • A new germanium-63/gallium-68 generator.

    A germanium-gallium generator producing EDTA-free Ga-68 would permit the synthesis of a broad range of Ga-68 radiopharmaceuticals and thus facilitate the widespread application of positron tomography. We have investigated a solvent-extraction generator system producing the weak complex of Ga-68 with 8-hydroxyquinoline (Ga-68 oxine), free of EDTA.

  • germanium gallium extraction - menuiseriefreson.be

    Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust. [Roy F Waters; Heine Kenworthy; United States. Bureau of Mines,] Get Price [Gallex] Germanium extraction and conversion. Sep 03, 2006 At the end of desorption all the germanium is contained in a volume of ab out 30 liters in the first scrubber. A series of ...

  • Global Substance Flow Analysis of Gallium, Germanium, and ...

    Apr 22, 2015  Summary This study provides a global substance flow analysis for gallium (Ga), germanium (Ge), and indium (In) for 2011, quantifying the amount of metal lost during extraction, beneficiation/smelti...

  • 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.

  • In ...

  • Mining And Processing Gallium

    Mining - Kazakhstan - For Australian Exporters - The mining industry in kazakhstan is focused mainly on extraction and export of raw materials and base metals, with further high-value processing abroad. about 80 per cent of mining products are exported representing 20 per cent of the country’s total exports. kazakhstan will remain an important center for iron ore mining in the near term.

  • A new germanium-63/gallium-68 generator.

    A germanium-gallium generator producing EDTA-free Ga-68 would permit the synthesis of a broad range of Ga-68 radiopharmaceuticals and thus facilitate the widespread application of positron tomography. We have investigated a solvent-extraction generator system producing the weak complex of Ga-68 with 8-hydroxyquinoline (Ga-68 oxine), free of EDTA.

  • germanium gallium extraction - menuiseriefreson.be

    Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust. [Roy F Waters; Heine Kenworthy; United States. Bureau of Mines,] Get Price [Gallex] Germanium extraction and conversion. Sep 03, 2006 At the end of desorption all the germanium is contained in a volume of ab out 30 liters in the first scrubber. A series of ...

  • Gallium — Wikipédia

    Zinc ← Gallium → Germanium: Al ... La solution basique surnageante de l'étape de précipitation étant réutilisée pour une nouvelle extraction d'ions aluminium, le gallium subit un phénomène de concentration. Quand les ions gallate sont suffisamment concentrés, ...

  • Recovery of Gallium from Bayer Liquor Using Chelating ...

    gallium are scarce, the general strategy has been to recover gallium from intermediate industrial products. Gallium is commonly found in bauxite ores to the extent of 0.002-0.008%.8 In the Bayer process, about 70% of the gallium content of Bauxite is leached along with the aluminum and about 30% is retained in the red mud.

  • NIOSHTIC-2 Publications Search - 10011080 - Germanium ...

    A continuous solvent extraction circuit was operated for over 150 h, extracting over 90 pct of the germanium from 0.30-G/l ge filtrates containing 40 to 60 g/l free acid. Over 90 pct of the loaded germanium was stripped from the organic phase with water at 75 deg c. A section on germanium and gallium co-extraction is also presented.

  • Gallium, Germanium, Indium, Vanadium, Or Molybdenum ...

    Nov 30, 2016  Gallium, Germanium, Indium, Vanadium, Or Molybdenum Produced Patents (Class 205/564) ... The method simplifies the process and improves extraction efficiency of gallium. Type: Grant Filed: April 27, 2011 Date of Patent: May 20, 2014 ...

  • Gallium-68: Radiolabeling of Radiopharmaceuticals for PET ...

    After the reaction, the reaction mixture can be purified using, for example, solid phase extraction from, for example, free gallium-68 and residual germanium-68 impurities. In the final step, the 68 Ga-radiopharmaceutical is sterile filtrated and formulated in the product vial ( Table 2 ).

  • Gallium: The Slippery Metal Seeking Alpha

    Feb 02, 2009  One of company's first projects is the planned extraction, if it proves viable, of germanium, gallium and zinc from the slag produced by, and

  • Gallium: A Slippery Metal ETF

    One of company's first projects is the planned extraction, if it proves viable, of germanium, gallium and zinc from the slag produced by, and stockpiled from, the Tsumeb Smelter in the Oshikoto ...

  • Extraction of germanium and gallium from coal fly ash and ...

    Get this from a library! Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust. [Roy F Waters; Heine Kenworthy; United States. Bureau of Mines,]

  • Process for the recovery of gallium and germanium from ...

    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.

  • Extraction of germanium and gallium from coal fly ash and ...

    Get this from a library! Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust. [Roy F Waters; Heine Kenworthy; United States. Bureau of Mines,]

  • Gallium — Wikipédia

    Zinc ← Gallium → Germanium: Al ... La solution basique surnageante de l'étape de précipitation étant réutilisée pour une nouvelle extraction d'ions aluminium, le gallium subit un phénomène de concentration. Quand les ions gallate sont suffisamment concentrés, ...

  • Recovering In, Ge and Ga from zinc residues (Journal ...

    A novel solvent extraction process has been developed to selectively recover indium, germanium and gallium from the cement residue sulfuric acid leach solutions in a hydrometallurgical zinc plant. The key work was to determine a special organic molecule for gallium and germanium extraction.

  • (PDF) Germanium: Current and Novel Recovery Processes

    [70] Waters RF, Kenworthy H. Extraction of germanium and gallium from coal y ash and . phosphorus furnace ue dust. Report 6940. US Bureau of Mines, 1967.

  • Gallium: The Slippery Metal Seeking Alpha

    Feb 02, 2009  One of company's first projects is the planned extraction, if it proves viable, of germanium, gallium and zinc from the slag produced by, and

  • Biomining of gallium and germanium containing ores ...

    Jul 09, 1991  The invention is more particularly directed to the extraction of gallium or germanium from gallium or germanium containing ores. State of the Art In the United States, gallium is generally produced as a byproduct of the Bayer process for producing alumina from bauxite and from zinc processing residues.

  • RI 9419 REPORT OF INVESTIGATIONS/1992 r--------

    Effect of H2S04 concentration on metal extraction from gallium-germanium ore ..... . Effect of leach temperature on metal extraction from gallium-germanium ore ..... . Effect of leach time at various acid concentrations on metal extraction from gallium-germanium ore .. .

  • Lanthanum Prices, Occurrence, Extraction and Use ...

    Lanthanum is a chemical element with the element symbol La and the atomic number 57. Lanthanum price, occurrence, extraction and use.

  • Process for the recovery of gallium and germanium from ...

    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.

  • Chemistry for Kids: Elements - Gallium

    Gallium has two stable isotopes that are found in nature: Gallium-69 and Gallium-71. Interesting Facts about Gallium. Large amounts of gallium are used at the Neutrino Observatory in Italy where it is used to study solar neutrinos produced inside the Sun. It is considered non-toxic and is

  • Gallium: A Slippery Metal ETF

    One of company's first projects is the planned extraction, if it proves viable, of germanium, gallium and zinc from the slag produced by, and stockpiled from, the Tsumeb Smelter in the Oshikoto ...

  • separation gallium extraction - ristorantelascialuppa.it

    Resources and extraction of gallium: A review ScienceDirect. 1. Introduction. Gallium (Ga), a soft and silvery-blue metal, was discovered in 1875 by the French chemist Paul-émile Lecoq de Boisbaudran (Moskalyk, 2003).With an average crustal abundance of 17 ppm, Ga is considered a trace metal (Redlinger et al., 2015).This element exhibits an extraordinarily wide temperature range in the liquid ...

  • Global Substance Flow Analysis of Gallium, Germanium, and ...

    Apr 22, 2015  Summary This study provides a global substance flow analysis for gallium (Ga), germanium (Ge), and indium (In) for 2011, quantifying the amount of metal lost during extraction, beneficiation/smelti...

  • The Element Gallium -- Gallium Atom

    Germanium is a hard, grayish-white element that has a metallic luster and the same crystal structure as diamond. In addition, it is important to note that germanium is a semiconductor, with electrical properties between those of a metal and an insulator.