Patents Assigned to Hillyard Chemical Company
  • Process for producing caprolactam
    Patent number: 3939153
    Abstract: A non-catalytic method is provided for depolymerizing nylon-6 to produce e-caprolactam. The nylon, as a melt is continuously fed to a reaction zone together with superheated steam and undecomposed polymer melt is continuously withdrawn from the reaction zone together with steam and polymer decomposition products. Caprolactam is recovered from the polymer decomposition products.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: February 17, 1976
    Assignee: Hillyard Chemical Company
    Inventor: Frank C. Fowler