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    Method of treating gas based on electrolytic fluorine containing uranium compounds
    6.
    发明授权
    Method of treating gas based on electrolytic fluorine containing uranium compounds 失效
    基于电解氟铀化合物处理气体的方法

    公开(公告)号：US5284605A

    公开(公告)日：1994-02-08

    申请号：US850883

    申请日：1992-03-13

    申请人： Francois Nicolas

    发明人： Francois Nicolas

    IPC分类号： C01B7/19 ,  B01D53/00 ,  B01D53/68 ,  C01G43/00 ,  C01G43/06 ,  G21F9/02

    CPC分类号： B01D53/68 ,  B01D53/002 ,  C01G43/066 ,  Y02C20/30 ,  Y10S62/918

    摘要： A method of treating a gas based on fluorine and containing hydrofluoric acid, and which may optionally contain condensable gaseous compounds, especially uranium compounds, and non-condensable gases. The gas is refrigerated to obtain a gaseous component containing fluorine and any non-condensable gases present, and a liquid phase containing liquid HF and condensable compounds in solution and/or suspension. The liquid phase is filtered to recover the compounds in suspension.

    摘要翻译： 一种处理基于氟并含有氢氟酸的气体的方法，其可任选地包含可冷凝气态化合物，特别是铀化合物和不可冷凝气体。 将气体冷却以获得含有氟和存在的任何不可冷凝气体的气态组分，以及在溶液和/或悬浮液中含有液体HF和可冷凝化合物的液相。 过滤液相以回收悬浮液中的化合物。

    Purification of solutions of sodium aluminate in the Bayer cycle by the removal of sodium oxalate
    8.
    发明授权
    Purification of solutions of sodium aluminate in the Bayer cycle by the removal of sodium oxalate 失效
    通过去除草酸钠在拜耳循环中纯化铝酸钠溶液

    公开(公告)号：US4597952A

    公开(公告)日：1986-07-01

    申请号：US747955

    申请日：1985-06-24

    申请人： Jean Fabre ,  Eric Lavalou ,  Francois Nicolas

    发明人： Jean Fabre ,  Eric Lavalou ,  Francois Nicolas

    IPC分类号： C01F7/02 ,  C01F7/47 ,  C01F7/06

    CPC分类号： C01F7/473

    摘要： A process for purifying at least a fraction of a solution in the Bayer cycle, which is preferably taken off after decomposition of the sodium aluminate, before or after concentration thereof, by causing the precipitation of the sodium oxalate in solution by the introduction of an agent for destabilization of the state of supersaturation of the sodium oxalate, which is characterized in that the supersaturation destabilization agent introduced into the Bayer solution to cause precipitation of the sodium oxalate is selected from the group comprising calcium oxalate and barium oxalate and that, in the case of solutions charged with degraded organic materials which generally result from high-temperature attack on bauxites with high proportions of humic materials, an anionic synthetic polyelectrolyte of high molecular mass is previously introduced into said solutions in order to increase the efficiency of the purification effect.

    摘要翻译： 一种纯化至少一部分拜耳循环中的溶液的方法，该方法优选在其浓缩之前或之后在铝酸钠分解之后，通过引入试剂使草酸钠沉淀在溶液中 用于使草酸钠过饱和状态不稳定，其特征在于引入Bayer溶液中的过饱和不稳定剂引起草酸钠的沉淀，其选自草酸钙和草酸钡，并且在这种情况下 通常由具有高比例腐殖质的铝土矿的高温侵蚀引起的降解有机材料的溶液，预先将高分子量的阴离子合成聚电解质引入所述溶液中，以提高净化效果。

    Carbonate, sulphate and hydroxide or hydrogen carbonate
    9.
    发明授权
    Carbonate, sulphate and hydroxide or hydrogen carbonate 失效
    碳酸盐，硫酸盐和氢氧化物或碳酸氢盐

    公开(公告)号：US4423009A

    公开(公告)日：1983-12-27

    申请号：US246398

    申请日：1981-03-23

    申请人： Pierre Maurel ,  Francois Nicolas

    发明人： Pierre Maurel ,  Francois Nicolas

    IPC分类号： C01D1/32 ,  C01F7/06 ,  C22B3/44 ,  C01G56/00 ,  C01G31/00 ,  C01G39/00

    CPC分类号： C01D1/32 ,  C01F7/06 ,  C22B3/44 ,  Y02P10/234

    摘要： Process for the purification of an aqueous solution containing alkali metal carbonate, sulphate, and hydroxide or hydrogen carbonate and primarily one at least of the metals belonging to the group formed by vanadium, uranium and molybdenum, in the form of alkali metal salts, and mineral and/or organic impurities, said solutions resulting from an ore attack cycle and being taken off after extraction of the metal being sought, which comprises treating said solutions by means of lime at a temperature which is at most equal to the boiling temperature, to convert the carbonate and hydrogen carbonate present into alkali metal hydroxide, then effecting separation and washing of a first precipitate of calcium carbonate and a liquor which is enriched in respect of alkali metal hydroxide, concentrating it by evaporation to cause production of a second precipitate which essentially comprises alkali metal sulphate, separating it from the hydroxide-rich liquid phase, re-dissolving it in an aqueous medium and treating the resulting alkali metal sulphate solution by means of barium aluminate and then carbon dioxide, and separating the resulting precipitate which is subjected to a heat treatment to regenerate the barium aluminate which is recycled.

    摘要翻译： 用于纯化碱金属碳酸盐，硫酸盐和氢氧化物或碳酸氢盐的水溶液的净化方法，以及主要由属于由钒，铀和钼形成的基团中的至少一种金属以碱金属盐和矿物质的形式 和/或有机杂质，所述溶液由矿石侵蚀循环产生并在萃取所述金属之后取出，其包括在至多等于沸点温度的温度下用石灰处理所述溶液以转化 碳酸盐和碳酸氢盐存在于碱金属氢氧化物中，然后分离和洗涤碳酸钙的第一沉淀物和相对于碱金属氢氧化物富集的液体，通过蒸发浓缩以产生第二沉淀物，其基本上包含 碱金属硫酸盐，将其与富含氢氧化物的液相分离，将其再溶解在水溶液中 并通过铝酸钡和二氧化碳处理得到的碱金属硫酸盐溶液，并分离所得到的沉淀物进行热处理以再生再生的铝酸钡。

    Process for the hot oxidized attack on a uraniferous ore by a concentrated alkaline liquor with simultaneous uranium precipitation
    10.
    发明授权
    Process for the hot oxidized attack on a uraniferous ore by a concentrated alkaline liquor with simultaneous uranium precipitation 失效
    通过浓缩的碱性液体同时进行铀沉淀，对含铀矿石进行热氧化攻击的过程

    公开(公告)号：US4400359A

    公开(公告)日：1983-08-23

    申请号：US172140

    申请日：1980-07-25

    申请人： Pierre Maurel ,  Francois Nicolas

    发明人： Pierre Maurel ,  Francois Nicolas

    IPC分类号： C22B60/02

    CPC分类号： C22B60/0247 ,  Y02P10/212

    摘要： The present invention concerns a continuous process for the oxidizing attack of a uraniferous ore by means of an aqueous recycling liquor which contains in a dissolved state alkaline carbonate and bicarbonate and uranium at a concentration close to the limit of solubility thereof at the temperature of the attack operation. The uranium which is precipitated in the course of the attack operation is collected within the solid phase which remains after attack. By redissolution in a suitable aqueous liquor and separation from the sterile materials, a uraniferous liquor is obtained.

    摘要翻译： 本发明涉及通过含水循环液的含水矿石的氧化侵蚀的连续方法，其在溶解状态下含有碱性碳酸盐和碳酸氢盐和铀，其浓度接近其在攻击温度下的溶解度极限 操作。 在攻击过程中沉淀的铀被收集在攻击后保持的固相中。 通过在合适的含水液体中再溶解并与无菌材料分离，得到尿素液体。