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Uranium(VI), Thorium(IV) and Scandium(III) Complexes of ...

2016-6-22 · scandium(III) complex from aqueous methanol medium 24 2. Thermal Studies 25 a. Thermogravimetry 25 b. Thermal reactions 25 3. Interaction of the Tris (Tropolonato) Scandium (III) Complex With Bidentate Ligands 26 IV. RESULTS AND DISCUSSION 27 A. Uranium(VI) Tropolonate Complexes 27 B. Thorium(IV) Tropolonate Complexes 41

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Separation of Scandium and Thorium in the Processing of ...

2020-10-26 · The extraction of scandium, uranium, and thorium with tributyl phosphate, trioctyl phosphine oxide (TOPO), Cyanex 923, and others was studied in sufficient detail [10, 11]. Extensive experience in the isolation of radioactive impurities from nitric acid solutions was accumulated in the preparation of rare-earth concentrates.

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Anion-exchange behavior of scandium, rare earths,

1. J Chromatogr. 1965 Jun;18(3):556-63. Anion-exchange behavior of scandium, rare earths, thorium and uranium in magnesium nitrate solution. Hamaguchi H, Hikawa I, Kuroda R.

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DIRECT QUANTIFICATION OF THORIUM, URANIUM AND

2012-6-5 · elements (REEs), thorium, uranium, scandium and yttrium. The measurements were carried out for each of the following analytical isotopes: 139 La, 140 Ce, 141 Pr, 143Nd, 147 Sm, 151Eu, 160 Gd, 159 Tb, 163 Dy, 165 Ho, 167Er, 169 Tm, 174 Yb, 175 Lu, 45 Sc, 89 Y, 232 Th and 238 U. Recovery percentage values found in these certified samples varied

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Positions of Thorium and Uranium in the Periodic Table ...

ELEMENT 90 of the Periodic Table, thorium, ordinarily appears as the first element of the actinide series, appended below cerium at the bottom of Table 1. This construction gives the impression ...

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The Recovery and Separation of Scandium, Yttrium,

The paper outlines the development of a solvent extraction process for the recovery of scandium, yttrium, thorium, and heavy lanthanides from waste sulphate liquor at the Port Pirie uranium treatment plant. A summary is given of known solvents for these elements, including the recently developed alkyl-phosphoric acid esters which are applicable to sulphate solutions.A kerosene solution of di ...

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Separation of thorium from uranium ore | SpringerLink

2019-12-7 · Thorium-230 has many research applications, but there is not a commercial source of this isotope. However, since 230 Th is part of the 238 U decay chain, it can be separated from naturally occurring uranium. In this work, a novel procedure was developed to separate thorium from uranium ore, consisting of leaching, liquid–liquid extraction, precipitations and ion exchange chromatography.

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Analytical applications of arsenazo III—II: Determination ...

THE reagent arsenazo III, produced1 in 1959, is widely used at the present time for determining thorium,1-10 uranium,1'2'11"13 zirconium,2'"-16 hafnium,17 pro- tactinium,18 scandium,19'20 neptunium,21'22 and the rare earth elements.19 Some of the papers mentioned,3'*'6'8'13'14 having been considered in a previous review2 are not discussed in ...

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"Extraction conductometric determination of scandium

A method for extraction - conductometric determination of scandium and thorium with tributyl phosphate and trioctyl phosphine oxide in kaolin was developed. The equivalent electrical conductivity of the complex of scandium and thorium with 2,7-dinitrozo-1,8-dihydroxynaphthalene-3,6-disulfonic acid was found. A scheme for the separation and determination of kaolin content is proposed.

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Study of scandium and thorium sorption from uranium

Keywords Scandium/thorium separation Uranium leach liquors Ion exchange Desorption Introduction A high diversity of scandium applications results in a high demand of this metal in the global ...

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Uranium(VI), Thorium(IV) and Scandium(III) Complexes of ...

2016-6-22 · scandium(III) complex from aqueous methanol medium 24 2. Thermal Studies 25 a. Thermogravimetry 25 b. Thermal reactions 25 3. Interaction of the Tris (Tropolonato) Scandium (III) Complex With Bidentate Ligands 26 IV. RESULTS AND DISCUSSION 27 A. Uranium(VI) Tropolonate Complexes 27 B. Thorium(IV) Tropolonate Complexes 41

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Addition of 8-Hydroxyquinoline by Thorium and Uranium

2019-5-26 · X-ray and differential thermal analysis studies on the 8-quinolinol and substituted 8-quinolinol metal chelates of thorium (IV), uranium (VI) and scandium (III). Journal of Inorganic and Nuclear Chemistry 1963 , 25 (3) , 247-252.

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Anion-exchange behavior of scandium, rare earths,

1. J Chromatogr. 1965 Jun;18(3):556-63. Anion-exchange behavior of scandium, rare earths, thorium and uranium in magnesium nitrate solution. Hamaguchi H, Hikawa I, Kuroda R.

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DIRECT QUANTIFICATION OF THORIUM, URANIUM AND

2012-6-5 · elements (REEs), thorium, uranium, scandium and yttrium. The measurements were carried out for each of the following analytical isotopes: 139 La, 140 Ce, 141 Pr, 143Nd, 147 Sm, 151Eu, 160 Gd, 159 Tb, 163 Dy, 165 Ho, 167Er, 169 Tm, 174 Yb, 175 Lu, 45 Sc, 89 Y, 232 Th and 238 U. Recovery percentage values found in these certified samples varied

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The Recovery and Separation of Scandium, Yttrium,

The paper outlines the development of a solvent extraction process for the recovery of scandium, yttrium, thorium, and heavy lanthanides from waste sulphate liquor at the Port Pirie uranium treatment plant. A summary is given of known solvents for these elements, including the recently developed alkyl-phosphoric acid esters which are applicable to sulphate solutions.A kerosene solution of di ...

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Positions of Thorium and Uranium in the Periodic Table ...

ELEMENT 90 of the Periodic Table, thorium, ordinarily appears as the first element of the actinide series, appended below cerium at the bottom of Table 1. This construction gives the impression that thorium is the second member of a series starting with actinium in the scandium group, just as cerium is the second member of a series starting with lanthanum in the scandium group.

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Development and Screening of Resins to Recover Rare

A significant amount of natural uranium is recovered by in situ leaching (ISL) technology. Uranium is extracted from the pregnant solution as uranyl sulfate anionic complexes while all elements in cationic form pass in to the sorption filtrate solution. Scandium, thorium and REE remain as cations under these conditions and these metals can be ...

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"Extraction conductometric determination of scandium

A method for extraction - conductometric determination of scandium and thorium with tributyl phosphate and trioctyl phosphine oxide in kaolin was developed. The equivalent electrical conductivity of the complex of scandium and thorium with 2,7-dinitrozo-1,8-dihydroxynaphthalene-3,6-disulfonic acid was found. A scheme for the separation and determination of kaolin content is proposed.

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元素之歌_百度百科

2021-9-25 · 元素之歌(The Element Song),又作元素周期表之歌。是由哈佛大学数学教授Tom Lehrer创作并演唱的一首化学知识歌曲。歌词包含了元素周期表中的绝大多数元素,按韵脚编排。以轻快活泼的钢琴曲为背景音乐,对学习背诵元素周期表大有益处。

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Uranium(VI), Thorium(IV) and Scandium(III) Complexes of ...

2016-6-22 · scandium(III) complex from aqueous methanol medium 24 2. Thermal Studies 25 a. Thermogravimetry 25 b. Thermal reactions 25 3. Interaction of the Tris (Tropolonato) Scandium (III) Complex With Bidentate Ligands 26 IV. RESULTS AND DISCUSSION 27 A. Uranium(VI) Tropolonate Complexes 27 B. Thorium(IV) Tropolonate Complexes 41

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Addition of 8-Hydroxyquinoline by Thorium and Uranium

2019-5-26 · X-ray and differential thermal analysis studies on the 8-quinolinol and substituted 8-quinolinol metal chelates of thorium (IV), uranium (VI) and scandium (III). Journal of Inorganic and Nuclear Chemistry 1963 , 25 (3) , 247-252.

Read More
Anion-exchange behavior of scandium, rare earths,

1. J Chromatogr. 1965 Jun;18(3):556-63. Anion-exchange behavior of scandium, rare earths, thorium and uranium in magnesium nitrate solution. Hamaguchi H, Hikawa I, Kuroda R.

Read More
DIRECT QUANTIFICATION OF THORIUM, URANIUM AND

2012-6-5 · elements (REEs), thorium, uranium, scandium and yttrium. The measurements were carried out for each of the following analytical isotopes: 139 La, 140 Ce, 141 Pr, 143Nd, 147 Sm, 151Eu, 160 Gd, 159 Tb, 163 Dy, 165 Ho, 167Er, 169 Tm, 174 Yb, 175 Lu, 45 Sc, 89 Y, 232 Th and 238 U. Recovery percentage values found in these certified samples varied

Read More
Positions of Thorium and Uranium in the Periodic Table ...

ELEMENT 90 of the Periodic Table, thorium, ordinarily appears as the first element of the actinide series, appended below cerium at the bottom of Table 1. This construction gives the impression that thorium is the second member of a series starting with actinium in the scandium group, just as cerium is the second member of a series starting with lanthanum in the scandium group.

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A PROCESS FOR THE RECOVERY OF URANIUM AND

@article{osti_4166466, title = {A PROCESS FOR THE RECOVERY OF URANIUM AND SCANDIUM FROM URANIUM REFINERY RAFFINATES}, author = {Lang, G P and Kuhlman, C W and Ruehle, A E}, abstractNote = {A process for the removal of the residual uranium amd scandium from refinery raffinates based on an extraction with 100% TBP, was developed. More than 99% of the uranium and 80% of

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Isolation: Scandium

2019-1-22 · It is also found in residues that remain after tungsten is extracted from wolframite, and from ores after uranium and thorium have been extracted. Scandium is more common in the sun and certain stars than on Earth. Scandium is only the 50th most common element on earth (35th most abundant in the Earth's crust), but it is the 23rd most common ...

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"Extraction conductometric determination of scandium

A method for extraction - conductometric determination of scandium and thorium with tributyl phosphate and trioctyl phosphine oxide in kaolin was developed. The equivalent electrical conductivity of the complex of scandium and thorium with 2,7-dinitrozo-1,8-dihydroxynaphthalene-3,6-disulfonic acid was found. A scheme for the separation and determination of kaolin content is proposed.

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Australian Uranium - Thorium

Australia's Thorium Reserves - Resources. Large thorium resources are found in Australia, Brazil, Canada, Greenland (Denmark), India, South Africa, and the United States. The primary sources of the world’s thorium are the rare-earth and thorium phosphate mineral monazite deposits. In the United States, thorium has been a byproduct of refining ...

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材料与化学研究所----中国科学院赣江创新研究院资源库

Removal of thorium and uranium from leach solutions of ion-adsorption rare earth ores by solvent extraction with Cextrant 230. Hydrometallurgy , 2020, 194: 105343. 13.

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