Patents by Inventor Jukka Hietala

Jukka Hietala 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).

  • Catalyst for metathesis reactions of olefines and a method for preparing it as well as the metathesis reaction concerned
    Patent number: 5296437
    Abstract: The invention relates to a catalyst to be utilized in the metathesis reactions of olefines, the catalyst comprising an after-treated tungsten complex containing diol ligands and hydrocarbon ligands, which are benzenes substituted with a lower alkyl group. The invention also relates to a method for preparing a heterogenous catalyst to be used in the metathesis reaction of olefines as well as to a metathesis process for the conversion of olefines.
    Type: Grant
    Filed: July 16, 1992
    Date of Patent: March 22, 1994
    Assignee: Neste OY
    Inventors: Jukka Hietala, Pekka Knuuttila, Markku Leskela, Reijo Sillanpaa, Ari Lehtonen
  • Metathesis process for olefines and a catalyst to be applied therein
    Patent number: 5177291
    Abstract: A metathesis process of the conversion of olefines, in which at least one olefine is brought into contact with a solid catalyst system comprising on a solid silica carrier 0.1-40% by weight of a tungsten compound under reaction conditions such that the catalyst system converts the olefine into olefines having a different molecular weight. In the process a magnesium oxide or titanium oxide containing co-gel prepared by means of a co-gelling system is used as the silica carrier.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 5, 1993
    Assignee: Neste Oy
    Inventors: Pekka Knuuttila, Jukka Hietala, Anja Linna