Results 251 to 260 of about 16,298 (289)

Recovery of thorium from sulphate solutions by anion exchange

Journal of Applied Chemistry, 1959
AbstractThe passage of solutions containing uranyl and thorium sulphate through columns of De‐Acidite FF strongly basic anion‐exchange resin results in the initial absorption of both metals as complex anions, followed by the qualitative displacement of thorium by uranium.
T. V. Arden, J. D. Nolan, B. J. Gower, V. A. Wright   +3 more
openaire   +1 more source

Recovery of uranium, thorium and rare earth from industrial residues

Hydrometallurgy, 2018
Abstract This paper addresses the development of a process to recovery uranium, thorium and rare earth elements from an industrial residue, with a subsequent removal of U and Th from the liquor generated. Sulfuric acid digestion followed by water leaching was found to be the best method to solubilise the metals.
Janúbia C.B.S. Amaral, Michelle L.C.G. Sá, Carlos A. Morais   +2 more
openaire   +1 more source

The Recovery of Trace Thorium from Large Quantities of Uranium

Solvent Extraction and Ion Exchange, 2009
This work describes the chromatographic separation of trace amounts of Thorium (mg or less) from large quantities of Uranium (g or kg). The separation method employs extraction chromatographic materials containing tetra(n‐octyl)diglycolamide (TODGA) and quaternary amine extractants.
E. Philip Horwitz, Daniel R. McAlister
openaire   +1 more source

Recovery of thorium from uranium solutions

JOM, 1966
At Elliot Lake, Ontario, thorium has been recovered from uranium ore leach solutions, after removal of the uranium by ion exchange resin, since 1959. A solvent extraction process is used, and the thorium is recovered as thorium sulfate by stripping the loaded solvent with moderately strong sulfuric acid.
openaire   +1 more source

Recovery of Thorium(IV) and Radium(II) from Chloride Solutions

Russian Journal of Applied Chemistry, 2005
Recovery of thorium(IV) and radium(II) by precipitation methods in the chloride technology of perovskite processing was studied.
V. G. Maiorov, Kh. B. Avsaragov, V. K. Kopkov, T. V. Popova, D. V. Maiorov, A. I. Nikolaev   +5 more
openaire   +1 more source

Recovery of Ra-223 from natural thorium irradiated by protons

Radiochimica Acta, 2016
AbstractIrradiation of natural thorium with medium-energy protons is considered to be a prospective approach to large-scale production of225Ac and223Ra. In addition to the earlier-developed method of225Ac isolation, the present work focuses on the simultaneous recovery of.223Ra from the same thorium target.
Aleksandr N. Vasiliev, Valentina S. Ostapenko, Elena V. Lapshina, Stanislav V. Ermolaev, Sergey S. Danilov, Boris L. Zhuikov, Stepan N. Kalmykov   +6 more
openaire   +1 more source

Recovery of uranium and thorium from zirconium oxychloride by solvent extraction

Journal of Radioanalytical and Nuclear Chemistry, 2011
A solvent extraction process is proposed to recover uranium and thorium from the crystal waste solutions of zirconium oxychloride. The extraction of iron from hydrochloride medium with P350, the extraction of uranium from hydrochloride with N235, and the extraction of thorium from the mixture solutions of nitric acid and the hydrochloric acid with P350
Xueming Zhong, Yuehui Wu
openaire   +1 more source

Recovery of Uranium, Thorium and Cerium from Egyptian monazite sands. I

Zeitschrift für anorganische und allgemeine Chemie, 1970
AbstractA process is described for the recovery of uranium, thorium and cerium from Egyptian monazite sands. The process consisted of: 1. Treatment of fine ground monazite sands with hot 50% caustic soda solution with a caustic soda to monazite sand ratio of 1:1. 2.
F. A. Saleh, A. K. Farag
openaire   +1 more source

Recovery of Protactinium from Irradiated Thorium Nitrate by Solvent Extraction

Radiochemistry
Recovery of protactinium from irradiated thorium nitrate by solvent extraction is studied in relation to the blanket conditions of a fusion neutron source (FNS) using -octanol and diisobutylcarbinol (DIBC) as extractants. The degree of extraction of Pa from a solution of irradiated thorium nitrate (600 g/dm) in 3 M nitric acid in one contact exceeded ...
M. L. Khokhlov, A. P. Yakushin, Yu. S. Fedorov, V. V. Samonin, V. D. Davidenko, A. A. Kovalishin, K. V. Pavlov, Yu. E. Titarenko, A. S. Kirsanov, A. A. Arkhipov, M. V. Kotel’nyi   +10 more
openaire   +2 more sources

Assessment of the Potential of By-Product Recovery of Thorium to Satisfy Demands of a Future Thorium Fuel Cycle

Nuclear Technology, 2015
A long-standing concern about the future implementation of thorium fuel cycles has been the availability of a thorium fuel cycle infrastructure, including thorium mineral recovery.
Timothy Ault, Steven Krahn, Allen Croff
openaire   +1 more source