Extraction gallium

Fox, C. L., 22 679 Foxing, 11 409 FPAT file, 13 230, 235 Fractal gelation model, 23 63-64 Fractal objects, formation of, 23 63 Fractile distribution, 26 1021 Fractional carbonation, gallium extraction by, 12 345... 

Gallium extraction Proposed for copper extraction Copper extraction from ammoniacal media... 

Isotherms of Ga extraction by TVEX-TBP, TVEX-DIOMP as well as by liquid TBP andDIOMP from 3,5, and 8 mol/L HCl solutions show (Figure 8.25 and Figure 8.26) that extractant equilibrium capacity increases with aqueous phase acidity increase extractant capacity in TVEX matrix is 1.3 to 1.5 times higher as compared with solvent extractant. Enthalpy of gallium extraction from 3 mol/L HCl is -11.7 kJ/mol for TBP and -12.0 kJ/mol for TVEX-TBP. Diffusion coefficient of gallium extraction is 4.210-" mVs for TVEX-TBP (3mol/L HCl) and 5.410-" mVs for TVEX-DIOMP (6 mol/L HCl) [27]. 

Polymers containing 8-hydroxyquinoline appear to be selective adsorbents for tungsten in alkaline brines (95). In the presence of tartrate and citrate, quinaldic acid [93-10-7] allows the separation of zinc from gallium and indium (96). Either of these compounds can selectively separate lead and zinc from oxide ores as complexes (97). It is also possible to separate by extraction micro quantities of rhenium(VII), using quinoline in basic solution (98). The... 

In some cases, a simple solvent extraction is sufficient to remove a particular impurity. For example, traces of gallium can be removed from titanous chloride in hydrochloric acid by extraction with diisopropyl ether. 

Harbuck, D. D. Judd, J. C. Behunin, D. V. Germanium solvent extraction from sulfuric acid solutions (and co-extraction of germanium and gallium). Solvent Extr. Ion Exch. 1991, 9, 383-401. 

Beja A process for extracting gallium from sodium aluminate solution, as used in the Bayer process, by means of successive carbonations. Developed by Pechiney in 1946. 

Phosphorus (P), 19 1-19. See also GaAsP system Gallium phosphide (GaP) semiconductor InGaAsP alloy Organophosphorus extractants Phosphate fertilizers atomized, 18 820... 

Preparation. Gallium is extracted from the circulating liquors of the A1203 process, by fractional precipitation, electrolytic process or extraction with chelating agents. 

The most widely used technique for the separation of large quantities of radioactive material is that of solvent extraction. The principle of the method is that ideally the partition coefficient of a compound between two solvents does not depend on concentration in a given set of conditions. This was shown in an early paper of Graham and Sea-borg (35) who demonstrated that the partition coefficients of gallium and cobalt chlorides between ether and aqueous hydrochloric acid were the same for concentrations of lCTli molar (i. e. no added carrier) as for 1-6xl0 s molar. 

Several other analytical procedures exist in which solvent extraction may be applied. Thus extraction has been used in a limited number of analyses with procedures such as (1) luminescence (fluorimetry), where, for example, the detection limit of rhodamine complexes of gallium or indium can be increased by extraction [28] (2) electron spin resonance using a spin-labelled extractant [29] and (3) mass spectrometry, where an organic extract of the analyte is evaporated onto pure AI2O3 before analysis [30]. 

In applications of TRUEX technology to the removal of actinides from hydrochloric acid media, CMPO will extract vanadium, iron, copper, zinc, gallium, zirconium, molybdenum, tin, and lead under the same conditions under which it will extract targeted actinides. The wastes extracted by the TRUEX process will require additional treatment before they may be safely disposed. 

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