Patents by Inventor Stabel Uwe

Stabel Uwe 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).

  • Isolation of tetrahydrofuran from mixtures which contain tetrahydrofuran, 1,4-butanediol, gamma-butyro-lactone and succinic acid esters
    Patent number: 5128490
    Abstract: A process is described for isolating tetrahydrofuran from mixtures containing tetrahydrofuran, 1,4-butanediol, -butyrolactone and succinic acid esters, in which the mixtures are heated to from 150.degree. to 250.degree. C. in the presence of phyllosilicates, the resultant tetrahydrofuran and water of reaction are removed from the reaction mixture by distillation, and the tetrahydrofuran is separated from the distillate.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: July 7, 1992
    Assignee: Basf Aktiengesellschaft
    Inventors: Stabel Uwe, Hans-Juergen Gosch, Rolf Fischer, Wolfgang Harder, Claus Hechler