— Semantic Scholar extracted view of "Highly efficient extraction separation of uranium VI and thorium IV from nitric acid solution with di 1 methyl heptyl methyl phosphonate" by Mengling Tan et al Abstract The extraction of uranium VI by triisoamyl phosphate TiAP has been studied to derive the thermodynamic parameters such as
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— Abstract The behavior of uranium and thorium ions in nanofiltration NF from aqueous solutions has been studied It was shown that the retention capacity R of the NF membrane for uranium and thorium depends on their state in aqueous solutions In the case of uranium the smallest values of R 82 83% are observed when uranium is in
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— A new absorbent surface oxidized wrinkled mesoporous carbon WMC O has been prepared for the selective extraction of thorium ions from rare earth ions and shows high selectivity for thorium adsorption due to
— The removal of radioactive elements thorium and uranium from the leach solution of ion adsorption rare earth ores by aluminum sulfate was studied using di 2 ethylhexyl [N 2 ethylhexyl aminomethyl] phosphonate Cextrant 230 L The extraction of thorium uranium rare earths aluminum and other elements was investigated in detail
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Thorium processing preparation of the ore for use in various products Thorium Th is a dense grams per cubic centimetre silvery metal that is softer than steel It has a high melting temperature of approximately 1 750 °C 3 180 °F Below about 1 360 °C 2 480 °F the metal exists in the
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— Owing to their natural radioactivity uranium U and thorium Th play significant roles in environmental sciences for monitoring radiation dose and in geological sciences for understanding sedimentary processes The Odisha coastal area in eastern India is a well known high background radiation area that is rich in monazites and rutile
— Monazite of red sediments source was digested with sulphuric acid and the grey paste was dissolved in water After separating the rare earths aqueous solution bearing uranium and thorium was contacted with activated carbon produced from waste tyres through pyrolysis to adsorb uranium selectively The process is unique as dilute
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— Keywords rare earth elements uranium thorium monazite concentrate supercritical fluid extraction car bon dioxide microwave radiation Monazite concentrate MC which is a mixture whose major components are orthophosphates of rare earth elements REEs and thorium was accumulated in Russia in the course of
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— Semantic Scholar extracted view of "Selective thorium and uranium extraction from monazite I Single stage oxalate leaching" by G Lapidus et al Abstract A short account is given on the extraction of rare earths from monazite sand bastnasite ore and phosphate rock of igneous origin This includes mineral beneficiation leaching
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— • Thorium is 3 to 4 times more abundant than uranium widely distributed in nature as an easily exploitable resource in many countries and has not been exploited commercially so far Thorium fuels therefore complement uranium fuels and ensure long term sustainability of nuclear power
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A flow sheet was developed to recover thorium from Egyptian monazite sands The results of a detailed investigation on the extraction and stripping of thorium in the hydrous oxide are obtained after alkaline dissolution followed by leaching with The results of this experiment indicated that the extraction of thorium and uranium was 87% and
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— To optimize the separation of uranium and thorium from the Yen Phu xenotime leachate counter current simulations of extraction scrubbing and stripping were done in a series of mixer settler units
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— The extraction behavior of uranium thorium and lanthanides represented by cerium and ytterbium by Cyanex 923 has been investigated The effect of different variables like the concentration of
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— The alkaline fusion method with sodium hydroxide NaOH was employed to extract thorium from monazite [29] The advantage of the alkali based decomposition method is that it is a mature process with simple equipment and a high grade of integrated utilization [40] Table 1 presents the chemical composition of the monazite obtained from the
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— Table 6 summaries the optimum parameters of the continuous countercurrent extraction scrubbing and stripping processes that resulted from studies discussed in Study on the extraction of thorium and uranium from control sulfate liquors using the primary amine N1923 and the tertiary amine TOA Study on the stripping of
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A study is made of three processes for the separation of thorium from uranium and rare earth elements in crude thorium nitrate solutions prepared by breakdown of monazite sand Uranium may be separated from thorium and rare earth elements in a preliminary extraction with 5% or 40% v/v tri n butyl phosphate TBP in xylene and the thorium
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— Uranium and Thorium exploration still in progress and continued in some potential places to inventory and increase category of the resources Uranium and Thorium as a by product of tin and zircone mining have significant content and need an intensive data collection Uranium and Thorium processing from uranium ore and
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An economical two cycle solvent extraction process has been developed on a bench scale for the separate recovery of thorium and uranium from monazite sulfate liquors Thorium is extracted in the Expand
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1 10 Radiochim Acta 88 33237 2000 11 by Oldenbourg Wissenschaftsverlag München 12 13 Solvent extraction of uranium VI and thorium IV 14 from nitrate media by Cyanex 923 15 16 By Sushanta K
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— Uranium and thorium are naturally occurring elements that are widespread in the Earth s crust Mining occurs in locations where such elements are naturally concentrated a rare earth phosphate mineral that is a minor constituent of heavy mineral sand HMS deposits On average monazite contains approximately 6 per cent thorium
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