Patents Examined by D. D. Cam
  • Process for the production of aromatic anhydrides and aromatic esters with superior color properties
    Patent number: 5101050
    Abstract: A process for the production of aromatic esters or aromatic anhydrides with improved color properties is disclosed. This process comprises treating the aromatic ester or aromatic anhydride with an activated boric acid followed by fractionation.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: March 31, 1992
    Assignee: Amoco Corporation
    Inventors: Chang M. Park, Ronald Coates, Juergen K. Holzhauer, John V. Peterson