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    • 4. 发明授权
    • Method for converting UO3 or U3O8 into hydrated UO4
    • 将UO3或U3O8转化为水合UO4的方法
    • US09045350B2
    • 2015-06-02
    • US13995277
    • 2011-12-16
    • Bertrand MorelDavid AmaraggiMehdi ArabRudy ThomasMurielle RivenetFrancis Abraham
    • Bertrand MorelDavid AmaraggiMehdi ArabRudy ThomasMurielle RivenetFrancis Abraham
    • C01G43/01C01B15/047C01G43/06
    • C01G43/01C01B15/0475C01G43/06C01P2002/72C01P2004/03C01P2004/10C01P2004/54C01P2006/12
    • A method for converting UO3 and/or U3O8 into hydrated UO4 of formula UO4.nH2O wherein n is 2 or 4, comprising the following successive steps: a) preparing an aqueous suspension of a UO3 powder and/or a U3O8 powder; b) adding hydrogen peroxide H2O2 to the aqueous suspension of a UO3 and/or U3O8 powder, converting the UO3 and/or U3O8 into hydrated UO4 and precipitating, crystallizing the hydrated UO4 in the suspension; c) recovering the precipitate, crystals of UO4 hydrate; d) optionally, washing the recovered UO4 hydrate precipitate, crystal(s); e) optionally, repeating step d); f) optionally, drying the precipitate, the crystals; wherein the addition of H2O2 to the aqueous suspension is carried out so that the suspension contains a stoichiometric excess of H2O2 relatively to the stoichiometry of the reaction from UO3: UO3+nH2O+H2O2→UO4.nH2O+H2O  (1) or of the reaction from U3O8 UO2.67+1.33H2O2+nH2O→UO4.nH2O+1.33H2O  (2), and the pH of the suspension is maintained in steps a) and b) at a value comprised between 2 and 3.
    • 将UO 3和/或U 3 O 8转化为式UO·4H 2 O的水合UO 4的方法,其中n为2或4,包括以下连续步骤:a)制备UO 3粉末和/或U 3 O 8粉末的水性悬浮液; b)向UO 3和/或U 3 O 8粉末的水性悬浮液中加入过氧化氢H 2 O 2,将UO 3和/或U 3 O 8转化为水合UO 4并沉淀,使悬浮液中的水合UO4结晶; c)回收沉淀物,UO4水合物晶体; d)任选地,洗涤回收的UO4水合物沉淀物,晶体; e)任选地,重复步骤d); f)任选地,干燥沉淀物,晶体; 其中向含水悬浮液中加入H 2 O 2使得悬浮液相对于来自UO 3 :OO 3 + nH 2 O + H 2 O 2→UO 4·n H 2 O + H 2 O(1)或反应的反应的化学计量比含有化学计量过量的H 2 O 2 从U3O8 UO2.67 + 1.33H2O2 + nH2O→UO4·nH2O + 1.33H2O(2),并且悬浮液的pH在步骤a)和b)中保持在2和3之间的值。
    • 6. 发明授权
    • Photocatalyst sheet
    • 光触媒片
    • US6113861A
    • 2000-09-05
    • US29393
    • 1998-02-27
    • Shiro Ogata
    • Shiro Ogata
    • B32B7/02B01D53/86B01J35/00B32B9/00C01B15/047C01G23/047A61L9/16
    • B01D53/86B01J35/002B01J35/004B01D2255/802Y10T428/2927Y10T428/2949Y10T428/2967
    • A photocatalytic sheet which has a base made of polymeric organic compound, that is not decomposed by a photocatalytic function, and also hardly loses the photocatalytic function after washing and is capable of providing the photocatalytic function even in an environment without sufficient ultraviolet radiation from outside. Using a fiber, a filament, a yarn made of fibers or filaments, a ribbon, a knitted fabric, a woven fabric, a nonwoven fabric, or a film as the base, a base protective layer is formed on a part of the base, which is made of the polymeric organic compound, and a photocatalytic semiconductor layer is formed on the entire surface of the base including the base protective layer.
    • PCT No.PCT / JP97 / 02242 Sec。 371日期1998年2月27日 102(e)1998年2月27日PCT 1997年6月27日PCT公布。 公开号WO98 / 00290 日期1998年1月8日一种具有由聚合有机化合物制成的基底的光催化片,其不被光催化功能分解,并且在洗涤后几乎不失去光催化功能,并且即使在没有足够的环境的环境中也能够提供光催化功能 紫外线辐射从外面。 使用纤维,长丝,由纤维或长丝制成的纱线,丝带,针织物,机织织物,无纺布或膜作为基底,在基底的一部分上形成基底保护层, 其由聚合有机化合物制成,并且在包括基底保护层的基底的整个表面上形成光催化半导体层。
    • 10. 发明授权
    • Production of uranium peroxide
    • 生产过氧化铀
    • US4024215A
    • 1977-05-17
    • US571089
    • 1975-04-24
    • Frank E. CaropresoDonald F. Kreuz
    • Frank E. CaropresoDonald F. Kreuz
    • C01G43/01C01B15/047C22B60/02G21C3/62C01G43/00
    • C22B60/0278C01B15/0475
    • A process of recovering uranium values as uranium peroxide from an aqueous uranyl solution containing dissolved vanadium and sodium impurities by treating the uranyl solution with hydrogen peroxide in an amount sufficient to have an excess of at least 0.5 parts H.sub.2 O.sub.2 per part of vanadium (V.sub.2 O.sub.5) above the stoichiometric amount required to form the uranium peroxide, the hydrogen peroxide treatment being carried out in three sequential phases consisting of I, a precipitation phase in which the hydrogen peroxide is added to the uranyl solution to precipitate the uranium peroxide and the pH of the reaction medium maintained in the range of 2.5 to 5.5 for a period of from about 1 to 60 minutes after the hydrogen peroxide addition; II, a digestion phase in which the pH of the reaction medium is maintained in the range of 3.0 to 7.0 for a period of about 5 to 180 minutes and III, a final phase in which the pH of the reaction medium is maintained in the range of 4.0 to 7.0 for a period of about 1 to 60 minutes during which time the uranium peroxide is separated from the reaction solution containing the dissolved vanadium and sodium impurities. The excess hydrogen peroxide is maintained during the entire treatment up until the uranium peroxide is separated from the reaction medium.
    • 一种从含有溶解的钒和钠杂质的水性铀酰溶液中回收铀值作为过氧化铀的方法,该方法是用足以使上述每部分钒(V 2 O 5)含有至少0.5份H 2 O 2过量的过氧化氢处理铀酰溶液 形成铀过氧化物所需的化学计量量,过氧化氢处理在三个连续的阶段中进行,这三个阶段由I组成,其中过氧化氢加入到铀酰溶液中以沉淀过氧化铀和反应的pH 培养基保持在2.5至5.5的范围内,加入过氧化氢后约1至60分钟; II,消化阶段,其中反应介质的pH保持在3.0至7.0的范围内约5至180分钟的时间和III,其中反应介质的pH保持在该范围内的最后阶段 为4.0〜7.0,时间约为1〜60分钟,在此期间,从含有溶解的钒和钠杂质的反应溶液中分离出铀过氧化物。 在整个处理期间保持过量的过氧化氢直到从反应介质中分离出过氧化二铀。