Sulfates uranium

Chemical Designations - Synonyms Uranium sulfate Uranium sulfate trihydrate Uranyl sulfate trihydrate Chemical Formula U02S04 3H20. 

Uranyl Sulfate Uranium Sulfate Uranium Sulfate Trihydrate Uranyl Sulfate Trihydrate ... 

U02S04 URANIUM SULFATE DIOXIDE 1754 WCI6[g] TUNGSTEN HEXACHLORIDE (GAS) 1796... 

In a classified report from 1942, which was unclassified and published in 1947, the three main analytical methods that were then used to determine uranium in a sample of hydrated UO3 were compared. One method used prolonged ignition in air in three stages (700°C, 820°C, and 930°C) to form UjO the second involved reduction of the product by hydrogen at 900°C to obtain UO2 and the third included titration with ceric sulfate of uranium sulfate produced by the reaction of UO3 with H2SO4. In their summary, the authors conclude The uranium content of a preparation of hydrated UO3 was determined by three independent procedures... The results of these three methods showed an extreme difference of 0.08%. ... 

Undecylethylene Undecylic Alcohol Unslaked Lime Uranium Acetate Uranium Acetate Dihydrate Uranium Nitrate Uranium Oxyacetate Dihydrate Uranium Sulfate Uranium Sulfate Trihydrate Uranyl Acetate Uranyl Acetate Dihydrate Uranyl Nitrate... 

UDMH (Unsymmetrical dimethyl hydrazine) - 219, 303, 306, 309, 312, 315, 366 Ucon products 102, 156, 283, 366, 820 Udylite 61 - 845 Ultraformer feed - 215 Ultrasonic cleaning solutions - 884 Ultraviolet light - 94 Ultrawet detergent - 185, 215 Undecyl alcohol - 93, 226 Undecylenic acid - 629 Undertaker s restorative - 845 Union oils and fluids - 283, 820 Unvis hydraulic fluid - 366 Uran 156, 215 Uranium 732 Uranium chloride - 597, 740 Uranium extraction - 215 Uranium fluoride - 215 Uranium ore - 598, 719 Uranium SX units - 215 Uranium sulfate-sulfuric acid - 384 Uranyl ammonium phosphate - 740 Uranyl nitrate - 598, 740 Uranyl sulfate - 740... 

Hydrogen ion concentration (pH). Orban of Mound Laboratory [48,56] studied the acidity of uranyl sulfate solutions from 25 to 60 C. Orban has also reported the pH values for uranyl sulfate solutions containing excess UO3 at temperatures up to 60°C [49,56]. Secoy has compiled information concerning the effects of uranium sulfate concentration upon pH as reported by a number of investigators [59]. Marshall has utilized the relationship between pH and concentration to determine the solubility of UO3 in sulfuric acid at elevated temperatures [7]. Table 3-13 shows the effect of sulfate concentration on pH at 25.00°C for various ratios of UO3 to sulfate as found by Marshall. 

Phosphate precipitation of uranium (IV) is more selective. It is made from dilute hydrochloric or perchloric acid solutions. Separation is made from manganese, iron, vanadium and most other elements. Zirconium, thorium, and, to a smaller extent, titanium and tin precipitate.-Aluminum Interferes by the formation of soluble complexea with uraniiuii and phosphate lons. With sulfate and aluminum present, uranium is precipitated in a narrow pH-range around one. At higher pH, the soluble alumlnum-uranlum-phosphate complex is formed at lower pH, the soluble uranium-sulfate... 

Is 1 5 Coagulation Is Improved by heating In a water-bath for ten to fifteen minutes after precipitation. Under these conditions separation Is made from V (tti) and (IV), Fe, Cu, and other dl- and trl-valent metals. Incomplete precipitation occurs with Increased or decreased acidity — probably because of enhanced solubility of the compound and complex fomatlon, respectively. Precipitation from sulfuric acid Is Incomplete hhcause of uranium-sulfate complex formation. Under certain conditions both uranlvim (IV) and (Vl) form complexes with hexametaphosphate. 

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