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1.发明授权
公开(公告)号：US5875385A
公开(公告)日：1999-02-23
申请号：US783264
申请日：1997-01-15
IPC分类号： C01G43/01 , C01G43/025
CPC分类号： C01G43/01 , C01G43/025 , Y02P20/129
摘要： The present invention provides a method for varying and controlling the chemical composition and physical properties of the uranium oxide solids produced by the thermal conversion of UF.sub.6. The method allows the production of predominantly UO.sub.2, U.sub.3 O.sub.8, or UO.sub.3 interchangeably from the same reactor simply by controlling the hydrogen and oxygen contents of the feed relative to uranium. The temperature profile of the thermal reactor is established by specifying the preheat of the feed prior to mixing, the feed composition, and the reactor wall temperature to thus vary and control the physical properties of the resulting solids according to the end use of the uranium product.
摘要翻译： 本发明提供了一种用于改变和控制由UF6的热转化产生的氧化铀固体的化学组成和物理性质的方法。 该方法允许主要通过相对于铀控制进料的氢和氧含量从相同的反应器互换地生产UO2，U3O8或UO3。 热反应器的温度曲线是通过在混合之前指定进料的预热，进料组成和反应器壁温度来确定的，从而根据铀产物的最终用途改变和控制所得固体的物理性能 。
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公开(公告)号：US4546611A
公开(公告)日：1985-10-15
申请号：US564113
申请日：1983-12-21
CPC分类号： B01D7/02
摘要： The invention is a UF.sub.6 -recovery process of the kind in which a stream of substantially pure gaseous UF.sub.6 is directed through an externally chilled desublimer to convert the UF.sub.6 directly to an annular solid ring adhering to the interior wall of the desublimer. After accumulation of a desired amount of solid UF.sub.6, the desublimer is heated to liquefy the solid. Subsequently, the liquid is recovered from the desublimer. It has been found that during the heating operation the desublimer is subjected to excessive mechanical stresses. In addition, it has been found that the incorporation of a very small percentage of relatively noncondensable, nonreactive gas (e.g., nitrogen) in the UF.sub.6 input to the desublimer effects significant decreases in the stresses generated during the subsequent melting operation. This modification to the process provides valuable advantages in terms of reduced hazard, lower operating costs for the desublimer, and increased service life for the desublimer and its auxiliaries. The new process is especially suitable for the recovery of enriched UF.sub.6 from high-speed UF.sub.6 gas-centrifuge cascades.
摘要翻译： 本发明是一种UF6回收方法，其中基本上纯的气态UF6流被引导通过外部冷却的均质器，以将UF6直接转换成附着在均质器内壁的环形固体环。 在堆积所需量的固体UF6之后，将均质化合物加热以使固体液化。 随后，从均质器中回收液体。 已经发现，在加热操作期间，均质器受到过大的机械应力。 此外，已经发现，将非常少百分比的相对不可缩短的非反应性气体（例如氮）引入到均质合子的UF6输入中，在随后的熔融操作期间产生的应力的作用显着降低。 对该方法的这种修改在减少危害，降低发行人的运营成本以及延长其分配器及其辅助设备的使用寿命方面提供了宝贵的优势。 新工艺特别适用于从高速UF6气体离心机级联回收富集的UF6。
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公开(公告)号：US4129425A
公开(公告)日：1978-12-12
申请号：US816575
申请日：1977-07-18
CPC分类号： B01D53/1418 , B01D3/322 , B01D53/14 , B01D53/1406
摘要： This invention is an improved gas-absorption process for the recovery of a desired component from a feed-gas mixture containing the same. In the preferred form of the invention, the process operations are conducted in a closed-loop system including a gas-liquid contacting column having upper, intermediate, and lower contacting zones. A liquid absorbent for the desired component is circulated through the loop, being passed downwardly through the column, regenerated, withdrawn from a reboiler, and then recycled to the column.A novel technique is employed to concentrate the desired component in a narrow section of the intermediate zone. This technique comprises maintaining the temperature of the liquid-phase input to the intermediate zone at a sufficiently lower value than that of the gas-phase input to the zone to effect condensation of a major part of the absorbent-vapor upflow to the section. This establishes a steep temperature gradient in the section. The stripping factors below this section are selected to ensure that virtually all of the gases in the downflowing absorbent from the section are desorbed. The stripping factors above the section are selected to ensure re-dissolution of the desired component but not the less-soluble diluent gases. As a result, a peak concentration of the desired component is established in the section, and gas rich in that component can be withdrawn therefrom.The new process provides important advantages. The chief advantage is that the process operations can be conducted in a single column in which the contacting zones operate at essentially the same pressure.
摘要翻译： 本发明是一种改进的气体吸收方法，用于从含有该组分的原料 - 气体混合物回收所需组分。 在本发明的优选形式中，工艺操作在包括具有上，中，下接触区的气 - 液接触塔的闭环系统中进行。 用于所需组分的液体吸收剂循环通过循环，向下通过柱，再生，从再沸器中取出，然后再循环至塔中。
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