Patents by Inventor Johan G.D. Haenen

Johan G.D. Haenen 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 an alkyl benzene
    Patent number: 5744671
    Abstract: The invention relates to a process for the preparation of an alkyl benzene by catalytic dehydrogenation of the corresponding alkenyl cyclohexene in the gas phase in the presence of a diluent. A characteristic feature is that at least a part of the alkyl cyclohexane in the reaction product is used as diluent. Hydrogen can be used as an additional diluent according to the invention.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: April 28, 1998
    Assignee: DSM N.V.
    Inventors: Henri J. H. Beelen, Geert I. V. Bonte, Michiel Cramwinckel, Henricus A. M. Duisters, Johan G. D. Haenen
  • Process for the dimerization of a conjugated diene
    Patent number: 5545789
    Abstract: The invention relates to a process for the dimerization of a conjugated diene using an iron triad metal nitrosyl halide, in combination with a reducing agent, as catalyst. The process is characterized in that the dimerization is carried out in the presence of nitrogen monoxide (NO). The invention is of interest in particular for the dimerization of butadiene to 4-vinyl cyclohexene.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: August 13, 1996
    Assignee: DSM N.V.
    Inventors: Henricus A. M. Duisters, Johan G.D. Haenen