Sep 06, 2007· A method for separating germanium-68 from gallium-68 using an anion exchange resin and a chelating/complexing agent containing a plurality of carboxylic acid groups and at least three carbon atoms to the first solution is disclosed together with a generator apparatus for providing a source of gallium …
THE DEVELOPMENT AND IMPLEMENTATION OF INDUSTRIAL HYDROMETALLURGICAL GALLIUM RECOVERY OF THE CLARKSVILLE REFINERY WASTE RESIDUE by ... Gallium, Germanium, Clarksville Residue, Clarksville Refinery, Ion Exchange, Electro-refining, ... Recovery of the gallium with a solvent extraction approach using, OPAP (Octyl Phenyl Acid Phosphate, C 14 H 23 O 4
ofcrudegallium,containing5percentofindium,0.1percentoflead, and smaller amounts of silver,tin, and zinc, was carefullypurified. Inorderthatthe method ofpurification devised might be of general
Le gallium pur a un aspect argenté et il se brise sous forme solide de la même manière que le verre. Le volume du gallium augmente de 3,1 % lorsqu'il se solidifie [a] et pour cette raison ne doit pas être stocké dans un récipient en verre ou en métal. Le gallium corrode la plupart des autres métaux en diffusant dans le réseau métallique.
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, ... Germanium and Gallium Extraction from Gasification Fly Ash: Optimisation for the Up-Scaling of a Recovery Process ...
Germanium and Gallium Extraction from . Germanium and Gallium Extraction from Gasification Fly Ash: Optimisation for the Up- ... Camino de los Descubrimientos, ... Avoir Plus. Germanium (Ge) - Chemical properties, Health and ... chemical properties, health and environmental effects of germanium.
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.
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,]
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.
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 …
This paper presents the results obtained from the study on the recovery of indium, germanium and gallium from zinc leaching residues in zinc hydrometallurgy plant. The proposed process flowsheet consists of counter-current acid leaching-P204 extraction of indium—P204 and C5-9 hydroxamic acid synergetic extraction of germanium and gallium.
Le germanium est l'élément chimique de numéro atomique 32, de symbole Ge. Il appartient au groupe 14 du tableau périodique.. Ce métalloïde est semi-conducteur et cristallise avec la même structure que le diamant, tout comme le silicium.Il possède cinq isotopes naturels, dont le 76 Ge, qui est faiblement radioactif.Au moins 27 radioisotopes ont été synthétisés.
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%
Gallium is a chemical element with the symbol Ga and atomic number 31. Elemental gallium is a soft, silvery blue 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 ...
Germanium Gallium Ore Leaching with Sulfuric Acid &#; Table of ContentsMaterial and EquipmentGermanium ExtractionAvoiding Germanium PrecipitationTwo-Stage Counter-Current LeachingIncreasing Germanium Extraction A sulfuric acid leach technique for extracting gallium and germanium from Apex ore without the use of a reducing agent, such as SO2, was investigated.
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 pct.
Feb 15, 2007· 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.
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 ...
Table of ContentsMaterial and EquipmentGermanium ExtractionAvoiding Germanium PrecipitationTwo-Stage Counter-Current LeachingIncreasing Germanium Extraction A sulfuric acid leach technique for extracting gallium and germanium from Apex ore without the use of a reducing agent, such as SO2, was investigated. Leaching studies showed that with increasing sulfuric acid concentrations, gallium ...
A germanium--gallium generator producing EDTA-free /sup 68/Ga would permit the synthesis of a broad range of /sup 68/Ga radiopharmaceuticals and thus facilitate the widespread application of positron tomography. We have investigated a solvent-extraction generator system producing the weak complex of ...
National Isotope Development Center Online Catalog. Half Life / Daughter: 270.95 days to gallium-68: Major Radiation: Positron: 511 keV
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.
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 ...
Recovery and separation of gallium(III) and germanium(IV) from zinc refinery residues : Part II: Solvent extraction. Author links open overlay panel Fupeng Liu a Zhihong Liu a Yuhu Li a Benjamin P. Wilson b Zhiyong Liu a Li Zeng a Mari Lundström b. Show more. https: ... when compared to the extraction of gallium and germanium in the sulfuric ...
U.S. Pat. No. 4,666,686 (1987, Krajewski, et al) discloses extraction of gallium, germanium or indium from basic or acidic solution with an organic phase containing at least Kelex 100 and LIX 26. The organic phase may also contain tri-n-octylphosphine oxide.
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
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 ...
Now that we understand the importance of the relationship between primary metal production and the extraction of minor metal by-products, we can discuss some of the effects that this relationship has on the supply of gallium.. Driven by demand for electronics, particularly flat panel displays (FPDs) and smart phones, consumption of gallium has grown by an estimated 5 to 10 percent per annum ...
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