公开(公告)号：US20140027300A1

公开(公告)日：2014-01-30

申请号：US13951643

申请日：2013-07-26

申请人： BASF SE

发明人： Günther Huber ,  Katrin Freitag ,  Anna Katharina Dürr ,  Jesus Enrique Zerpa Unda ,  Susanna Voges ,  Karolin Geyer

IPC分类号： C25C3/02

CPC分类号： C25C3/02 ,  C25C7/005

摘要： Process for preparing an alkali metal from a salt of the alkali metal which is soluble in a solvent, including a first electrolysis, a concentration, and a second electrolysis. The first electrolysis produces a product mixture. This product mixture is then concentrated to give a largely solvent-free alkali metal (poly)sulfide melt. A second electrolysis at a temperature above the melting point of the alkali metal is then performed in a second electrolysis cell comprising an anode space and a cathode space, separated by a solid electrolyte which conducts alkali metal cations. The alkali metal (poly)sulfide melt from the concentration step is fed to the anode space. Sulfur is removed from the anode space and liquid alkali metal is removed from the cathode space.

摘要翻译： 由可溶于溶剂的碱金属盐制备碱金属的方法，包括第一次电解，浓缩和第二次电解。 第一次电解产生产品混合物。 然后将该产物混合物浓缩，得到大部分无溶剂的碱金属（多）硫化物熔体。 然后在高于碱金属熔点的温度下进行第二次电解，在包含阳极空间和阴极空间的第二电解槽中进行，该阳极空间和阴极空间由导电碱金属阳离子的固体电解质隔开。 来自浓缩步骤的碱金属（多）硫化物熔体被供给到阳极空间。 从阳极空间除去硫，并从阴极空间除去液态碱金属。