Patents by Inventor Antonius J. C. Van Seters

Antonius J. C. Van Seters 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 the preparation of 3,5-xylenol
    Patent number: 4453025
    Abstract: Isophorone is converted to 3,5-xylenol in the vapor phase in the presence of a heterogeneous catalyst comprising a particular combination of multiple rare earth metals on an alumina support or one or more rare earth metals in combination with one or more transition metals and/or one or more alkali or alkaline earth metals. Particularly good results are obtained with a catalyst comprising a naturally-occurring mixture of rare earth metals known as didymium in combination with potassium and cobalt promoters.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: June 5, 1984
    Assignee: Shell Oil Company
    Inventors: Antonius J. C. Van Seters, Freddy Wattimena