METHOD OF IMPROVING THE PURITY OF ALKALI-METAL HYDROXIDES
    1.
    发明公开
    METHOD OF IMPROVING THE PURITY OF ALKALI-METAL HYDROXIDES 失效
    用于改善的碱金属氢氧化物的纯度。

    公开(公告)号:EP0165945A1

    公开(公告)日:1986-01-02

    申请号:EP85900029.0

    申请日:1984-12-24

    IPC分类号: C01G49 C01D1 D21C11

    摘要: Dans un procédé pour améliorer la pureté d'hydroxydes de métal alcalin, on utilise des composés de métal alcalino-terreux pour rendre les impuretés insolubles, diminuant ainsi la pénétration d'impuretés dans une solution d'hydroxyde de métal alcalin ou favorisant le retrait d'impuretés d'une solution contaminée d'hydroxydes de métal alcalin. La présente invention peut être appliquée en particulier pour augmenter la pureté d'hydroxydes de métal alcalin régénéré à partir de liqueur épuisée résultant de la pulpation alcaline exempte de soufre du bois ou la pureté d'un autre matériau naturel contenant des fibres cellulosiques.

    A PROCESS FOR RECOVERING ALKALI METAL HYDROXIDE FROM ORGANIC LIQUORS
    2.
    发明公开
    A PROCESS FOR RECOVERING ALKALI METAL HYDROXIDE FROM ORGANIC LIQUORS 失效
    从有机液体回收碱金属氢氧化物的方法

    公开(公告)号:EP0663890A1

    公开(公告)日:1995-07-26

    申请号:EP93921752.0

    申请日:1993-09-30

    IPC分类号: B01J2 C01D1 C01G49 D21C11

    摘要: The specification describes a process for recovering alkali metal hydroxides from an organic liquor such as black liquors derived from pulping wood chips. The organic liquor is burned in a fluidised bed combustion furnace containing fluidised particles of an iron rich mixed oxide of an alkali metal and iron. Particles of alkali metal ferrite are extracted from the furnace and dissolved in a solution of alkali metal hydroxide to form a more concentrated solution of alkali metal hydroxide and a precipitate of the iron rich mixed oxides of alkali metal and iron. A mixed oxide disclosed in the specification has the following formula: - NaFe5O84H2O.

    摘要翻译: 该说明书描述了从有机液体中回收碱金属氢氧化物的方法,所述有机液体例如来自制浆木片的黑液。 有机溶液在流化床燃烧炉中燃烧,该流化床燃烧炉含有碱金属和铁的富含铁的混合氧化物的流化颗粒。 碱金属铁氧体颗粒从炉中提取并溶解在碱金属氢氧化物溶液中以形成更浓的碱金属氢氧化物溶液和富含铁的碱金属和铁的混合氧化物的沉淀物。 说明书中公开的混合氧化物具有下式: - NaFe 5 O 8·8H 2 O.

    A PROCESS FOR PELLETISING PARTICLES OF ALKALI METAL FERRITE
    3.
    发明公开
    A PROCESS FOR PELLETISING PARTICLES OF ALKALI METAL FERRITE 失效
    一种使碱金属铁氧体颗粒化的方法

    公开(公告)号:EP0662860A1

    公开(公告)日:1995-07-19

    申请号:EP93921753.0

    申请日:1993-09-30

    IPC分类号: B01J2 C01D1 C01G49 D21C11

    摘要: The specification describes a process for pelletising particles of an alkali metal ferrite with an aqueous binder such as a black liquor derived from pulping wood chips. The particles are ground and fed to a microgranulator in measured quantities together with measured quantities of aqueous binder. The particles are ground such that they have an even size distribution about a mean in the range from 25 to 50 microns. The particles are mixed with the binder in the microgranulator to form microgranules which are fed to a pelletising pan. The temperature of the microgranules on the pelletising pan is controlled by cooling either or both the alkali metal ferrite or aqueous binder prior to measuring them into the microgranulator. A pan temperature of less than 70 °C is disclosed.

    摘要翻译: 该说明书描述了一种用含水粘合剂(例如源自制浆木片的黑液)使碱金属铁氧体颗粒成粒的方法。 研磨颗粒并将其与测定量的含水粘合剂一起以测量的量输入微型颗粒机。 研磨颗粒使得它们具有约25至50微米范围内平均尺寸的均匀尺寸分布。 颗粒在微粒成形机中与粘合剂混合以形成微粒,将其送入丸粒盘。 通过冷却碱金属铁氧体或水性粘合剂中的一种或两种来控制造粒盘上的微粒的温度,然后将其测量到微粒成形器中。 披露了锅温低于70℃。