Patents Assigned to Institut fur Chemische Verfahrenstechnik
  • Acid-base polymer blends and their use in membrane processes
    Patent number: 6759441
    Abstract: The present invention relates to polymer blends and polymer blend membranes which consist of a polymeric sulfonic acid and of a polymer which contains primary, secondary or tertiary amino groups, which are prepared via mixing of a salt of the polymeric sulfonic acid with the polymer which contains primary, secondary or tertiary amino groups. The invention further relates to the use of polymer blend membranes in membrane fuel cells, polymer electrolyte membrane fuel cells (PEM fuel cells) or direct methanol fuel cells (DMFC), in membrane electrolysis, in aqueous or non-aqueous electrodialysis, in diffusion dialysis, in the perstractive separation of alkenes from alkene/alkane mixtures (here the membranes are in the SO3Ag form, where the Ag+ forms a reversible complex with the alkene (→facilitated transport)), in pervaporative separation of water from water/organics mixtures, or in gas separation.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: July 6, 2004
    Assignee: Universitat Stuttgart Lehrstuhl und Institut fur Chemische Verfahrenstechnik
    Inventors: Jochen Kerres, Wei Cui
  • Engineering ionomeric blends and engineering ionomeric blend membranes
    Patent number: 6723757
    Abstract: The present invention relates to novel compatible binary and ternary cation-exchanger polymer and anion-exchanger polymer blend membranes.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: April 20, 2004
    Assignees: Universitat Stuttgart Lehrstuhl, Institut fur Chemische Verfahrenstechnik
    Inventors: Jochen Kerres, Andreas Ullrich, Thomas Häring