Patents by Inventor Werner Muench

Werner Muench 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 the neutralization of acid solutions of caprolactam
    Patent number: 3937789
    Abstract: A process is disclosed in which the heat generated, during neutralization, y ammonium sulfate of a solution of .xi.-caprolactam in sulfuric acid, is used to effect evaporation of water present, and the temperature is kept at about 40.degree.C to 50.degree.C, under subatmospheric pressure, so that substantial hydrolysis of the caprolactam is avoided while a substantial portion of the water present in the neutralization mixture is evaporated at the subatmospheric pressure, and the ammonium sulfate is crystallized substantially free from entrained caprolactam. The caprolactam is then separated from the aqueous phase.
    Type: Grant
    Filed: December 14, 1973
    Date of Patent: February 10, 1976
    Assignee: Snia Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Ivo Donati, Werner Muench, Mario Fidecicchi