Patents by Inventor Henk Dirkzwager

Henk Dirkzwager 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).

  • Patent number: 7674940
    Abstract: A process for the preparation of detergents containing a relatively low amount of isoparaffins, involving separating a hydrocarbonaceous product stream from a Fischer-Tropsch process using a cobalt based catalyst and producing normally liquid and normally solid hydrocarbons into a light fraction boiling below an intermediate fraction having detergent hydrocarbons, an intermediate boiling fraction having detergent hydrocarbons and a heavy fraction boiling above the intermediate boiling fraction having detergent hydrocarbons, followed by conversion of the detergent hydrocarbons present in the intermediate boiling fraction into detergents, the Fischer-Tropsch process being carried out at a relatively high pressure.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: March 9, 2010
    Assignee: Shell Oil Company
    Inventors: Henk Dirkzwager, Robert Martijn Van Hardeveld, Arend Hoek, Peter William Lednor, Joannes Ignatius Geijsel
  • Publication number: 20060224028
    Abstract: Systems and methods to produce branched alkyl aromatic hydrocarbons are described. Systems may include an olefin isomerization unit, an olefin dimerization unit, a dehydrogenation-isomerization unit, an alkylation unit, a dehydrogenation unit, a hydrogenation unit and/or combinations thereof. Methods for producing branched alkyl aromatic hydrocarbons may include isomerization of olefins in a process stream. The isomerized olefins may be used to alkylate aromatic hydrocarbons. After alkylation of the aromatic hydrocarbons, unreacted components from the alkylation process may be separated from the alkyl aromatic hydrocarbons. The unreacted components from the alkylation process may be recycled back into a process stream or sent to other processing units.
    Type: Application
    Filed: June 5, 2006
    Publication date: October 5, 2006
    Inventors: Paul Ayoub, Steven Sumrow, Henk Dirkzwager, Brendan Murray
  • Publication number: 20060149117
    Abstract: A process for the preparation of detergents containing a relatively low amount of isoparaffins, involving separating a hydrocarbonaceous product stream from a Fischer-Tropsch process using a cobalt based catalyst and producing normally liquid and normally solid hydrocarbons into a light fraction boiling below an intermediate fraction having detergent hydrocarbons, an intermediate boiling fraction having detergent hydrocarbons and a heavy fraction boiling above the intermediate boiling fraction having detergent hydrocarbons, followed by conversion of the detergent hydrocarbons present in the intermediate boiling fraction into detergents, the Fischer-Tropsch process being carried out at a relatively high pressure.
    Type: Application
    Filed: February 19, 2004
    Publication date: July 6, 2006
    Inventors: Henk Dirkzwager, Robert Van Hardeveld, Arend Hoek, Peter Lednor, Joannes Geijsel
  • Publication number: 20040176655
    Abstract: Systems and methods to produce branched alkyl aromatic hydrocarbons are described. Systems may include an olefin isomerization unit, an olefin dimerization unit, a dehydrogenation-isomerization unit, an alkylation unit, a dehydrogenation unit, a hydrogenation unit and/or combinations thereof. Methods for producing branched alkyl aromatic hydrocarbons may include isomerization of olefins in a process stream. The isomerized olefins may be used to alkylate aromatic hydrocarbons. After alkylation of the aromatic hydrocarbons, unreacted components from the alkylation process may be separated from the alkyl aromatic hydrocarbons. The unreacted components from the alkylation process may be recycled back into a process stream or sent to other processing units.
    Type: Application
    Filed: February 4, 2004
    Publication date: September 9, 2004
    Inventors: Paul Marie Ayoub, Steven C. Sumrow, Henk Dirkzwager