Patents by Inventor Carsten Lau Laursen

Carsten Lau Laursen 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 and process unit for the preparation of ammonia synthesis gas
    Patent number: 6077459
    Abstract: Process and process unit for the preparation of ammonia synthesis gas from a hydrocarbon feedstock comprising sequentially primary and secondary catalytic steam reforming of the feedstock in a primary heat exchange steam reformer and in a subsequent secondary reformer, wherein an effluent stream of primary steam reformed gas is heated by indirect heat exchange with a hot product effluent of secondary reformed gas prior to introduction of the primary steam reformed gas into the secondary reformer.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: June 20, 2000
    Assignee: Haldor Topsoe A/S
    Inventors: Carsten Lau Laursen, Henrik Otto Stahl
  • Steam reforming process
    Patent number: 5925328
    Abstract: A process for the preparation of ammonia synthesis gas includes supplying a feedstock gas, optionally mixed with a flue gas, to at least one pair of reforming reactors. Each reactor has a process and fuel side and a combustion side. Each pair of reactors is arranged in parallel on the process and fuel side, and in series on the combustion side. A flame temperature in each pair of reactors is controlled by supplying an excess of combustion air to a first reactor of the pair, and oxygen-depleted combustion air to a second reactor of the pair.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: July 20, 1999
    Assignee: Haldor Topsoe A/S
    Inventors: Henrk Otto Stahl, Ib Dybkj.ae butted.r, Carsten Lau Laursen