Patents by Inventor Ioannis Kirgios

Ioannis Kirgios has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for separating and concentrating gallium from an aqueous solution containing gallium, together with aluminum, zinc and copper
    Patent number: 5326441
    Abstract: Process for separating and concentrating gallium from an aqueous solution containing gallium, together with aluminium, zinc and/or copper, charactrized by the following combination of features: (a) preparation of a water-in-oil emulsion consisting of a neutral or alkaline aqueous phase and an organic phase containing an oil-soluble reactant in a homogenizer in a volume ratio of aqueous phase to organic phase of 2:2 to 3:2; (b) dispersion of the water-in-oil emulsion in the aqueous solution containing gallium, which is adjusted to at least 4 mol/l of HCI, in an extractor in a volume ratio of aqueous phase to water-in-oil emulsion of 30:1 to 10:1 until droplets of the water-in-oil emulsion with a diameter less than or equal to 1 mm are obtained; (c) separation of the water-in-oil emulsion from the aqueous continuum and splitting of the emulsion in a reactor with coaxial, double-insulated electrodes in a high-voltage kV/cm and a frequency greater than 50 Hz, the unsplit portion of the water-in-oil emulsion being
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: July 5, 1994
    Assignee: European Economic Community
    Inventors: Ioannis Kirgios, Karl Schugerl, Wolfgang Degener