Studies on the extraction of zirconium with organophosphorus compounds

Umezawa, Hirokazu; Hara, Reinosuke

doi:10.1016/s0003-2670(01)81577-4

Cited by 14 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also the equilibrium constants for the reaction UOP+ + 2NOr + 2So, «=í U02(NO,)2S2o, (26) vary in the same order: for S = (BuO)3PO log K = 1.08 (437), for S = (BuO)2BuPO log K = 2.78 (324) or 2.98 (437), for S = (BuO)Bu2PO log K = 4.47 and for S = Bu3PO log K = 6.53 (324) or 6.58 (437). Similar observations were made by many workers, studying extraction of uranium (53,54,149,196,402), neptunium (441), plutonium (54) and zirconium (415). Compounds of the type RC(0)CH2P(0)(0R)2 where the R's may be the same or different, show good extraction of scandium and yttrium (439).…”

Section: Neutral Phosphorus Compounds: Other Reagentssupporting

confidence: 82%

Solvent Extraction of Inorganic Species.

Marcus¹

1963

Chem. Rev.

110

View full text Add to dashboard Cite

Section: Neutral Phosphorus Compounds: Other Reagentssupporting

confidence: 82%

Solvent Extraction of Inorganic Species.

Marcus¹

1963

Chem. Rev.

110

View full text Add to dashboard Cite

“…As shown in the equation above, the D-value and amount of extracted Zr significantly depends on the concentration of TBP and HNO 3 . According to the literature 65 K ex for the reaction above is 0.016 at ≈5 mol·L −1 of HNO 3 .…”

Section: Resultsmentioning

confidence: 85%

Production of zirconium-88 via proton irradiation of metallic yttrium and preparation of target for neutron transmission measurements at DICER

Matyskin

Stamatopoulos

O'Brien

et al. 2023

Sci Rep

View full text Add to dashboard Cite

A process for the production of tens to hundreds of GBq amounts of zirconium-88 (88Zr) using proton beams on yttrium was developed. For this purpose, yttrium metal targets (≈20 g) were irradiated in a ~16 to 34 MeV proton beam at a beam current of 100–200 µA at the Los Alamos Isotope Production Facility (IPF). The 88Zr radionuclide was produced and separated from the yttrium targets using hydroxamate resin with an elution yield of 94(5)% (1σ). Liquid DCl solution in D2O was selected as a suitable 88Zr sample matrix due to the high neutron transmission of deuterium compared to hydrogen and an even distribution of 88Zr in the sample matrix. The separated 88Zr was dissolved in DCl and 8 µL of the obtained solution was transferred to a tungsten sample can with a 1.2 mm diameter hole using a syringe and automated filling station inside a hot cell. Neutron transmission of the obtained 88Zr sample was measured at the Device for Indirect Capture Experiments on Radionuclides (DICER).

show abstract

“…(1,7,(36)(37)(38)(39)(40)(41)(42)(43)(44)(45), to separate the matrix and reduce the total dissolved solid concentration to tolerable limits. A number of complexing agents (1,(46)(47)(48) are available for zirconium, but few would qualify for quantitative complexation with zirconium without affecting traces of these elements. Uranium is an important element which has a specification of 3.5 ppm (13-16) in nuclear-grade zirconium alloys as it undergoes fission in nuclear reactors.…”

Section: Introductionmentioning

confidence: 99%