Patents by Inventor Kwang-Chic Lai

Kwang-Chic Lai 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 preparing caprolactam
    Patent number: 5977356
    Abstract: A simple and single step process for producing caprolactam comprising reacting 5-formylvaleric acid or an ester thereof in a solvent of water and/or an alcohol with hydrogen and ammonia in the presence of a noble metal catalyst supported by a carrier at 80.degree. to 300.degree. C. under a pressure of 10 to 120 atm, whereby amination, acidification, dehydration and cyclization occur to obtain caprolactam.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: November 2, 1999
    Assignees: Industrial Technology Research Institute, Acelon Chemicals & Fiber Corporation
    Inventors: Shiao-Jung Chu, Hsi-Yen Hsu, Ching-Tang Lin, Kwang-Chic Lai, J. H. Tsai