Purifying The Cathode Patents (Class 205/529)
  • Process for removing water from alkali metal amalgam
    Patent number: 8440067
    Abstract: The invention relates to a process for removing small amounts of water and possible further constituents from alkali metal amalgam, wherein the alkali metal amalgam is brought into contact with an element which is insoluble in mercury and catalyzes the reaction of water with the alkali metal amalgam and the possible further constituents to form hydroxides and hydrogen.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: May 14, 2013
    Assignee: BASF SE
    Inventors: Marc Martin, Günther Huber, Michael Lutz, Wolfgang Kanther, Josef Guth, Holger Friedrich
  • Device for the separation of mercury from caustic soda in chlor-alkali plants
    Patent number: 8216444
    Abstract: The invention relates to a device for breaking the electrical continuity of the stream of caustic soda produced in mercury-cathode chlor-alkali plants. The device is comprised of a vessel internally subdivided into three compartments by two flow-conveying septa, the three compartments being in communication and defining a caustic soda tortuous flow-path allowing the centrifugal deposition of mercury microdroplets released by the upstream amalgam decomposer.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: July 10, 2012
    Assignee: Industrie de Nora S.p.A.
    Inventors: Giovanni Meneghini, Raffaello Bertin