Patents Examined by Bascomb, Jr. Wilbur L.
  • Method for the separation of indole
    Patent number: 4404063
    Abstract: A method for the separation of indole by distilling an indole-containing reaction fluid obtained by the reaction of aniline with ethylene glycol or by the reaction of N-(.beta.-hydroxyethyl)aniline, which comprises bringing the reaction fluid into contact with a basic substance prior to and/or during the distillation. This method can prevent the deterioration of indole during the distillation procedure.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: September 13, 1983
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventor: Tadatoshi Honda