Patents Assigned to Sulzcr Chemtech AG
  • Method of purifying ionic liquids
    Patent number: 8333809
    Abstract: The present invention relates to a method for the purification of an ionic liquid by means of fractional crystallization in which a part of the ionic liquid is crystallized and the crystallizate formed is separated from the liquid remainder. In this respect the ionic liquid is charged with a certain amount of at least one entrainer substance.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: December 18, 2012
    Assignee: Sulzcr Chemtech AG
    Inventors: Axel König, Manfred Stepanski, Andrzej Kuszlik