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    • 10. 发明公开
    • Solid polycrystalline potassium ion conductor having a Beta
    • 固定POLYCRYSTALLINE钾离子导体与β-全铝结构,生产和金属钾与此钾离子导体范围内。
    • EP1672098A2
    • 2006-06-21
    • EP05026059.5
    • 2005-11-30
    • BASF Aktiengesellschaft
    • Schierle-Arndt, Kerstin, Dr.Huber, GüntherHeavens, Dr. Stephen NicholasBlackburn, Dr. John StuartJones, Dr. Ivor Wynn
    • C25C3/02C04B35/113
    • C25C3/02C04B35/113C04B2235/3201C04B2235/3203C04B2235/3206C04B2235/3217C04B2235/3244C04B2235/94C04B2235/96
    • A solid polycrystalline potassium ion conductor having a β"-Al 2 O 3 structure is obtainable by means of ion exchange of the alkali metal ions of a polycrystalline alkali metal β"-Al 2 O 3 moulding, in which the alkali metal ions are sodium ions or a mixture of sodium and potassium ions and the molar ratio M 2 O (M = alkali metal) to Al 2 O 3 is 1 : x, x being an integer or non-integer number within the range 5 to 11, for potassium ions, the ion exchange being effected by a method wherein neither chloride-containing nor liquid potassium ion sources are used, the method comprising the steps of:

      embedding the polycrystalline alkali metal β"-Al 2 O 3 moulding in an oxidic powder containing potassium and aluminium of a molar K 2 O : Al 2 O 3 ratio within the range of 1 : (x-1) to 1 : (x+1), the weight of oxidic powder amounting to at least two times the weight of the moulding;
      heating the embedded moulding at a rate of at least 100°C per hour to at least 1100°C; and
      further heating to at least 1300°C, this temperature being maintained for at least one hour prior to cooling.

      Potassium metal is obtained, starting from potassium amalgam, by electrolysis using an anode containing potassium amalgam, liquid potassium metal as a cathode and this solid potassium ion conductor as a membrane separating cathode and anode spaces.
    • 具有²的固体多晶钾离子导体“-Al 2 O 3结构是由多晶碱金属²的碱金属离子的离子交换的手段获得的A” -Al 2 O 3成型,其中,所述碱金属离子是钠 离子或钠和钾离子的混合物的摩尔比M 2 O(M =碱金属)与Al 2 O 3为1,则x是所述范围内的整数或非整数5至11,对于钾 离子,该离子交换由一个方法实现worin使用既不含氯也不液体钾离子源,所述方法包括如下步骤:嵌入所述多晶碱金属²“-Al 2 O 3成型在氧化物粉末含有钾和 摩尔的K铝2 O:的Al 2 O 3比1的范围内:(X-1)〜1:(X + 1),氧化物粉末的总计模塑的至少两倍重量的重量; 以每小时至少100℃至至少1100℃的速率加热该嵌入成型;和进一步加热到 至少1300℃,此温度保持为至少一小时冷却之前进行。 钾金属获得,使用到阳极含有钾汞合金,液体金属钾作为阴极,该固体钾离子导体作为膜分离的阴极和阳极空间从钾汞合金出发,通过电解。