Patents by Inventor Helmut Striegler

Helmut Striegler 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).

  • Process for skeletal isomerization of n-alkenes
    Patent number: 5396015
    Abstract: Skeletal isomerization of n-alkenes into isoalkenes and enrichment of isoalkenes in alkene-containing hydrocarbon mixtures is effected in the presence of an isomerization catalyst containing a microporous silicon-containing alumophosphate.A goal of the method for skeletal isomerization is to provide a running time in one operating period of over 100 hours. This goal is achieved by using, as isomerization catalysts, microporous alumophosphates with a molecular sieve structure whose pore inlet openings have a diameter of 0.4 to 0.6 nm which are mixed with a binder and activated at temperatures of 623 to 873K.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: March 7, 1995
    Assignee: Veba Oel AG
    Inventors: Rolf Fricke, Gerhard Ohlmann, Udo Roost, Heide L. Zubowa, Dieter Timm, Karl Becker, Helmut Striegler