Patents by Inventor Michael Q. de Steenwinkel

Michael Q. de Steenwinkel 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).

  • Zeolite-based ethylabenzene process adaptable to an aluminum chloride-based ethylbenzene plant
    Patent number: 5959168
    Abstract: A zeolite-based ethylbenzene process which is suitable for retrofitting aluminum chloride-based ethylbenzene plants. The process involves alkylating benzene with ethylene in an alkylation zone in the presence of zeolite beta or Y or an MCM zeolite so as to produce an alkylation product mixture containing benzene, ethylbenzene, and polyethylbenzenes which can be separated in the aromatics recovery (distillation) stage of an aluminum chloride-based plant. The polyethylbenzenes are subsequently contacted with benzene in a transalkylation zone using zeolite beta or mordenite or Y so as to produce a transalkylation product mixture which is also separable in the aromatics recovery stage of an aluminum chloride-based plant.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: September 28, 1999
    Assignee: The Dow Chemical Company
    Inventors: Matheus J. M. van der Aalst, Mohammed S. U. Samson, Garmt R. Meima, Michael Q. de Steenwinkel