Patents Assigned to Lenzinc Aktiengesellschaft
  • Process for the purification of aqueous solutions of amine-oxides
    Patent number: 5503749
    Abstract: A process for the purification of aqueous solutions of amine-oxides, characterized in that said solutions are contacted with an aqueous purification solution of an alkali hydroxide and/or ion pair reagent by means of an anion active membrane. By means of the process according to the invention, an efficient separation, particularly of anions of lower carboxylic acids and inorganic acids, can be achieved.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: April 2, 1996
    Assignee: Lenzinc Aktiengesellschaft
    Inventors: Johann Manner, Heinrich Firgo, Wolfram Kalt, Werner Richardt