Patents by Inventor Henricus A. M. Duisters

Henricus A. M. Duisters 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 production of an aqueous stream comprising melamine and aldehyde
    Publication number: 20090026414
    Abstract: Process for the production of an aqueous stream comprising melamine and aldehyde in which a melamine comprising aqueous stream is contacted with an aldehyde comprising stream, the melamine comprising aqueous stream originating from a melamine plant, and process for the production of an aqueous stream comprising melamine, urea and aldehyde in which a melamine comprising aqueous stream and a urea comprising stream are being contacted with an aldehyde comprising stream, the melamine comprising aqueous stream originating from a melamine plant.
    Type: Application
    Filed: September 30, 2005
    Publication date: January 29, 2009
    Inventors: Nora A. Wit De, Hendrik D. Hoving, Henricus A.M. Duisters, Hendrinus M. Verschoor
  • 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
  • Process for removing mercury from a non-polar organic medium
    Patent number: 4950408
    Abstract: The invention is concerned with a process for removing mercury from a non-polar organic medium like a liquid hydrocarbon mixture, most preferably a natural gas condensate, by contacting the medium to be treated with a solid adsorbent, preferably an ion-exchange resin, containing active thiol-groups. By this method it is possible to remove mercury from the treated medium in an amount of more than 97%.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: August 21, 1990
    Assignee: Stamicarbon B.V.
    Inventors: Henricus A. M. Duisters, Paul C. Van Geem