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    Process for treatment of sodium hydroxide waste liquor containing aluminum
    11.
    发明授权
    Process for treatment of sodium hydroxide waste liquor containing aluminum 失效
    处理含铝的氢氧化钠废液的方法

    公开(公告)号：US5531906A

    公开(公告)日：1996-07-02

    申请号：US283532

    申请日：1994-08-01

    申请人： Susumu Takayama ,  Yasuie Mikami ,  Nobuyoshi Iyatomi ,  Minoru Orikasa

    发明人： Susumu Takayama ,  Yasuie Mikami ,  Nobuyoshi Iyatomi ,  Minoru Orikasa

    IPC分类号： C01D1/28 ,  C01D1/32 ,  C01F7/00 ,  C02F1/58 ,  C23G1/36 ,  C02F1/62

    CPC分类号： C01F7/005 ,  C01D1/32 ,  C23G1/36 ,  C01P2002/22 ,  C01P2002/72 ,  C01P2002/88 ,  C01P2004/03 ,  Y10S210/912

    摘要： A process for treating sodium hydroxide waste liquor containing aluminum, comprising the steps of: adding, to aluminum-containing sodium hydroxide waste liquor, at least one of MgO and Mg(OH).sub.2 in an amount of 0.5 to 3 moles with respect to 1 mole of aluminum to cause a reaction at 70.degree. C. or more; and separating and removing a precipitated magnesium-aluminum compound is disclosed. The present invention makes it possible to recover recyclable sodium hydroxide from an aluminum-containing sodium hydroxide waste liquor. Even if the recovering procedure is repeated, no carbonate ions are accumulated. Therefore, it is possible to prevent degradation of the treating solution containing sodium hydroxide. Further, the by-product is a useful compound, and thus, there is no problem in the reprocessing or disposal of the by-product.

    摘要翻译： 一种用于处理含有铝的氢氧化钠废液的方法，包括以下步骤：向含铝氢氧化钠废液中加入相对于1的0.5-3摩尔的MgO和Mg（OH）2中的至少一种 摩尔的铝在70℃以上引起反应; 并且公开了分离和除去沉淀的镁 - 铝化合物。 本发明使得可以从含铝氢氧化钠废液中回收可回收的氢氧化钠。 即使重复回收步骤，也不会积聚碳酸根离子。 因此，可以防止含有氢氧化钠的处理液的劣化。 此外，副产物是有用的化合物，因此副产物的后处理或处理没有问题。

    Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum
    12.
    发明授权
    Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum 失效
    用于纯化含有碳酸钠或碳酸钾，硫酸盐和可能的氢氧化物的溶液以及至少一种金属钒，铀和钼的方法

    公开(公告)号：US4451439A

    公开(公告)日：1984-05-29

    申请号：US324060

    申请日：1981-11-23

    申请人： Pierre Maurel ,  Bernard Bosca ,  Francois Nicolas

    发明人： Pierre Maurel ,  Bernard Bosca ,  Francois Nicolas

    IPC分类号： C01D1/20 ,  C01D1/28 ,  C01D1/32 ,  C01D7/00 ,  C01D7/07 ,  C01F7/47 ,  C22B34/22 ,  C22B34/34 ,  C22B60/02 ,  C01G39/06 ,  C01D5/00 ,  C01F11/18

    CPC分类号： C01D1/20 ,  C01D1/28 ,  C01D1/32 ,  C01D7/00 ,  C01D7/07 ,  C01F7/473 ,  C22B34/22 ,  C22B34/34 ,  C22B60/0247 ,  C22B60/0278

    摘要： A process for the purification of solutions containing sodium or potassium carbonate, sulphate, hydroxide or hydrogen carbonate, and mainly at least one of the metals belonging to the group formed by vanadium, uranium or molybdenum, in the form of sodium or potassium salts, and inorganic and/or organic impurities, wherein the above-mentioned solutions are completely or partially caustified by the addition of an adequate amount of lime, whereby a first precipitate essentially containing calcium carbonate is separated, and the separated liquor is concentrated by evaporation until the hydroxide content is at most equal to 50%, to cause the production of a second precipitate which essentially comprises sodium or potassium sulphate, then, after separation thereof, a hydroxide-rich liquor is collected.This process is more particularly adapted for treatments of liquors resulting from the alkaline attach of vanadiferous and uraniferous ores.

    摘要翻译： 用于纯化含有碳酸钠或碳酸钾，硫酸盐，氢氧化物或碳酸氢盐的溶液的方法，以及主要是属于由钒或铀或钼形成的钒，铀或钼形成的基团中的至少一种金属，其为钠盐或钾盐， 无机和/或有机杂质，其中通过加入足够量的石灰将上述溶液完全或部分地除去，由此分离出基本上含有碳酸钙的第一沉淀物，通过蒸发浓缩分离的液体直到氢氧化物 含量最多等于50％，导致产生基本上包含硫酸钠或硫酸钾的第二沉淀物，然后在分离之后，收集富含氢氧化物的液体。 该方法更特别适用于由含钒和含铀矿石的碱性附着产生的液体的处理。