fe titanium uranium thorium separation of zirconium

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CN103014333A - Separation and recovery method of uranium

According to the invention, the uranium, thorium and rare earth are leached out by weak acid at a low temperature, and the liquid phase and solid phase are easy to separate; the secondary slag is subjected to beneficiation and alkaline decomposition by a beneficiation technology, and closed-loop circular recovery of uranium, thorium and rare

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Study on uranium recovery from tungsten residue: separation of U from Fe

Selectivity between uranium and tetravalent or some trivalent metal elements, such as thorium(IV), zirconium(IV), titanium(IV), and scandium(III), is low if just using an organophosphorus acid only. In fact, acidic organophosphorus is adopted to separate uranium(VI), tetravalent and some trivalent metal elements from monovalent, divalent and some other trivalent metal elements.

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International Symposium on Uranium Raw Material for the

zirconium, uranium and titanium. Iron (III) chloride is removed firstly by TBP solvent extraction Typical composition of Iron free solution 7 R. Uzmen IAEA-International Symposium on Uranium Raw Material for the Nuclear Fuel Cycle, 23-27 June 2014 Ti 3126

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Simultaneous Determination of Thorium and Uranium in Mineral

An emission spectrum and the vicinity of uranium at the same analytical ionic line for NIST SRM 694 containing Fe in the concentration of 0.47 ± 0.02% m/m with the addition of 125.0 mg kg-1 (or 1.0 mg L-1) of Th and U were also obtained, as shown in Figure S2.

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Preparation and characterization of three different phases of

The preparation and characterization of three different phases of zirconium phosphate (ZrP) have been carried out using XRD, SEM, EDX, and FTIR spectroscopy. The phases exchange and sorption properties with three different radioisotope 234Th, 238U, and 134Cs were investigated.

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Separation of uranium and thorium from rare earths for rare earth

2015/6/1 · The separation of uranium(VI), thorium and rare earths in a series of acidic solutions with Cyanex 923 (a mixture of tri-alkylphosphine oxides) was investigated (Gupta et al., 2002). It was found that uranium could be separated well from rare earths in HCl and possibly H 2 SO 4 solutions ( Fig. 7 ).

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Solvent extraction and spectrophotometric determination of

It has been found that 11.75 to 47.00 mg of uranium can be extracted from a binary mixture containing 4.78 to 19.04 mg of titanium, 9.12 to 36.48 mg of zirconium, 116.0 to 460.0 mg of thorium, 6.95 to 27.8 mg of lanthanum or 7.06 to 28.24 mg of cerium at pH 3.0.

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Direct determination of uranium and thorium in minerals by

A direct method of uranium and thorium determination in non-conducting geological samples using time-of-flight mass spectrometry with pulsed glow discharge was proposed. The following rock specimens were analysed: metamict zircon, metamict rinkite, metamict samarskite (Y–Fe-niobate), pyrochlore and jacinth.

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SEPARATION OF TITANIUM FROM ZIRCONIUM, HAFNIUM, THORIUM

Abstract Titanium(IV) was extracted at pH 4.5 from 0.01 M ascorbic acid with 0.1 M Aliquat 336S in xylene and was stripped with 1 M hydrochloric acid and determined spectrophotometrically as its complex with tiron at 380 nm. The group separation of Ti, Zr, Hf and

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ANALYSIS OF URANIUM, THORIUM AND ZIRCONIUM (Technical Report

article{osti_4269778, title = {ANALYSIS OF URANIUM, THORIUM AND ZIRCONIUM}, author = {Almassy, Gy and Ordogh, M and Schneer, A}, abstractNote = {Considering the physico-chemical conditions for tributyl phosphate uranium extraction, the optimum nitrate concentration of the aqueous phase in which uranium separation by single extraction amounted virtually to 100% was determined.

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Ion-exchange separation and spectrophotometric determination

The adsorbed thorium, zirconium and uranium are separated by elution with acid ammonium sulfate solution, hydrochloric acid and perchloric acid, respectively.

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PDF Determination of traces of uranium and thorium in

other for chemical separation of uranium and tho-rium from an acid-decomposed solution as in the case of chemical analysis, tion of Uranium, Thorium, and Zirconium with Arsenazo Il1 without Chemical Separation, Zavodsk. Lab. (U.S.S.R.) Element Cd Cu Fe Pb Zn Level ng/L 3 10 60 10 too

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Separation of Thorium from Rare Earths, Zirconium, and Other Elements by Cation Exchange Chromatography

2002/5/1 · Selective separation of thorium from rare earths, zirconium and other elements by cation-exchange chromatography in hydrobromic acid media. Analytica Chimica Acta 1972, 62 (2) , 351-359. DOI: 10.1016/0003-2670(72)80043

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PART 110—EXPORT AND IMPORT OF NUCLEAR EQUIPMENT AND MATERIAL

3) Thorium-227, thorium-228, uranium-230, and uranium-232 when contained in a device, or a source for use in a device, in quantities of less than 3.7 × 10 –3 TBq (100 millicuries) of alpha activity (3.12 micrograms thorium-227, 122 micrograms thorium-228, 3.7 micrograms uranium-230, 4.7 milligrams uranium-232) per device or source.

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Froth flotation of ores - PETROVICH; VOJISLAV

Titanium, zirconium, thorium, chromium, wolfram ores were mostly beneficiated by gravity concentration followed by electrostatic or magnetic separation of main or accessory minerals. Aside from that practice, which in some instances was successful, the electrostatic and magnetic separation equipments are expensive investment especially when they represent supplementary investments.

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Development and Screening of Resins to Recover Rare Earth Elements (REE) and Scandium from Different Sources

Zhaowu Zhu, et al. (2015), Separation of uranium and thorium from rare earths for rare earth production – A review, Minerals Engineering. 77, 185–196. John J. Barghusen, M. Smutz., (1957) Processing of Monazite Sands, Volume 947 of Ames Laboratory, Iowa State University (ISC) series , United States Atomic Energy Commission, Technical Information Service, and also Ind. Eng. Chem., 1958, 50

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Formation of Zirconium Hydrophosphate Nanoparticles and

Zhuravlev I, Zakutevsky O, Psareva T, Kanibolotsky V, Strelko V, Taffet M, Gallios G. Uranium sorption on amorphous titanium and zirconium phosphates modified by Al 3+ or Fe 3+ ions. J Radioanal Nucl Chem. 2002; 254 (1):85-89. doi: 10.1023/A:1020893515049. [Google Scholar]

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CN104263930A - Method for extraction separation of uranium

According to the method, the extraction rate of uranium is higher than 99%, the extraction rates of thorium, scandium, zirconium and titanium are lower than 0.5%, and the separation effect is good.

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Ultratrace analysis of uranium and thorium in glass

Back-extraction is carried out with HCl/KMnO4. For the separation of titanium- and zirconium-cotraces an extra separation method had to be developed: they are extracted with TTFA/hexanol/CCl4 before the separation of uranium- and thorium-traces from the matrix. The glasses were digested with HF/HX.

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Zirconium | chemical element | Britannica

Zirconium (Zr), chemical element, metal of Group 4 (IVb) of the periodic table, used as a structural material for nuclear reactors. atomic number 40 atomic weight 91.22 melting point 1,852 °C (3,366 °F) boiling point 3,578 °C (6,472 °F) specific gravity 6.49 at 20 °C (68 °F) oxidation state +4

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Study on uranium recovery from tungsten residue: separation of U

Selectivity between uranium and tetravalent or some trivalent metal elements, such as thorium(IV), zirconium(IV), titanium(IV), and scandium(III), is low if just using an organophosphorus acid only. In fact, acidic organophosphorus is adopted to separate uranium(VI), tetravalent and some trivalent metal elements from monovalent, divalent and some other trivalent metal elements.

Learn More