Patents Examined by Wilbur Basscomb
  • Method of separating .gamma.-butyrolactone from mixtures containing diethyl succinate
    Patent number: 5030328
    Abstract: A method of separating .gamma.-butyrolactone from a mixture containing ethanol, tetrahydrofuran, water, n-butanol, 1,4-butanediol, diethyl succinate and .gamma.-butyrolactone, by distillation in vacuum columns.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: July 9, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fischer, Peter Stops, Erwin Brunner, Rudolf Weigand