Patents Represented by Law Firm Hammond Richard J.
  • Enantiomeric resolution
    Patent number: 5256816
    Abstract: A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. In this process, the aryl-substituted aliphatic carboxylic acid is reacted with an inorganic base in the presence of an organic base to substantially enrich the precipitate in one of the enantiomers and an improved yield. Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: October 26, 1993
    Assignee: Ethyl Corporation
    Inventors: William T. Murray, Robert E. Young, Azfar A. Choudhury, Deepak R. Patil