Preparing Directly By Reducing A Nitrosamine Patents (Class 564/465)
  • Patent number: 11969711
    Abstract: The present invention relates to a carbon-based precious metal-transition metal composite catalyst and a preparation method therefor, and more particularly, to a catalyst synthesis method in which, when preparing a high-content precious metal-transition metal composite catalyst, a catalyst having uniform particles and composition can be prepared, and cyclohexane dimethanol (CHDM) is efficiently produced by the hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) in an aqueous solution.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: April 30, 2024
    Inventors: Jeong Kwon Kim, Sun Woo Yook, Bong Sik Jeon, Wan Jae Myeong
  • Patent number: 4564677
    Abstract: Disclosed is a method of preparing N-amino compounds from corresponding secondary amines by reacting a secondary amine with nitrous acid and zinc in a neutral pH reaction media to form the corresponding N-amine.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: January 14, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventor: Martin L. Kantor