Abstract:
The present invention relates to a process for the electrochemical purification of aluminium, which comprises the steps (a) provision of an electrolysis apparatus having at least one anode and at least one cathode in an electrolysis space, where the at least one anode and the at least one cathode are connected by an electrolyte and the electrolyte is present in the form of an electrolyte stream; (b) oxidation at the at least one anode which contains aluminium and at least one of the additional metals antimony, lead, iron, bismuth, tin, zinc or copper, where aluminium and the at least one additional metal go at least partly into the electrolyte in the form of their ions; (c) discharge of part of the electrolyte stream from the electrolysis space, where the substream contains at least part of the ions of aluminium and of the at least one additional metal ion; (d) removal of at least part of the at least one additional metal ion from the substream; (e) introduction of the substream which has been depleted in additional metal ions in step (d) into the electrolysis space and (f) deposition of the aluminium from the substream fed in in step (e) on the at least one cathode, where the electric current density at the at least one cathode is at least 50 A/m2.
Abstract translation:本发明涉及一种用于铝的电化学清洗力,包括以下步骤:(a)提供具有至少一个阳极和在电解室中,其中所述至少一个阳极和至少一个阴极通过电解质连接的至少一个阴极,和电解质的电解装置 是在电解质流的形式; (B)在含有铝的至少一个阳极和外来金属锑,铅,铁,铋,锡,锌或铜,铝和过渡至少一种异质金属至少部分地进入在它们的离子形式的电解质中的至少一种氧化; (C)排出从电解室中的电解质流的一部分,含有至少部分的铝离子和至少一种异质金属离子的部分流; (D)在部分流的至少一个外来金属离子的耗尽; (E)在步骤(d)馈送到Fremdmetallion耗尽的电流部分,以电解腔和(f)从在步骤(e)中铝的分离提供的至少一个阴极的部分流,所述至少一个阴极的电流密度至少 50 A /平方米施加。
Abstract:
The invention relates to a device for receiving hot, corrosive liquids (7), comprising a chamber enclosed by a wall (21) for receiving the liquid (7), wherein the chamber comprises an interior insulation (19). The invention further relates to a use of the device for storing corrosive liquids for storing a heat storage medium comprising sulfur.
Abstract:
Electrode unit for an electrochemical device, comprising a solid electrolyte (3) and a porous electrode (7), wherein the solid electrolyte (3) separates a space for cathode material and a space for anode material and the porous electrode (7) is connected in surface-area contact to the solid electrolyte (3), wherein a displacer (23) is accommodated in the space for anode material, wherein the displacer (23) is produced from a high-grade steel or from graphite foil and comes to lie against the inner geometry of the solid electrolyte (3) in a resilient manner such that the displacer (23) does not contact the solid electrolyte over the full surface area, or wherein the displacer comprises an outer shell (62) made of high-grade steel or graphite and a core (64) made of a nonferrous metal, wherein the nonferrous metal is thermoplastically deformable at a temperature that is lower than the temperature at which the high-grade steel is thermoplastically deformable, and wherein, for production, the high-grade steel or graphite shell (62) is pressed against the solid electrolyte (3) by introducing and heating the nonferrous metal and, during cooling down, a gap forms between the solid electrolyte (3) and the high-grade steel shell (62).
Abstract:
A thermoelectric material in a shape for forming part of a thermoelectric module, the thermoelectric material is coated with a protective layer to prevent degradation by humidity, oxygen, chemicals or thermal stress.
Abstract:
17AbstractImproved industrial apparatus for the large-scale storage of electric energyThe invention relates to an improved industrial apparatus for the large-scale storage of energy and a process for storing and transporting electric energy by means of this apparatus. Figure 1