Patents by Inventor P. Christian Hulteberg

P. Christian Hulteberg 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).

  • Removal of ammonia in urea finishing
    Patent number: 9493408
    Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: November 15, 2016
    Assignee: STAMICARBON B.V.
    Inventors: Johanna Eliasson, Ylva Eriksson, David Holmström, P. Christian Hulteberg, Hans T. Karlsson, Filip Nilsson, Frida Ojala, Johan Albert Arno Van Den Tillaart
  • REMOVAL OF AMMONIA IN UREA FINISHING
    Publication number: 20120330060
    Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.
    Type: Application
    Filed: February 12, 2010
    Publication date: December 27, 2012
    Applicant: Stamicarbon B.V.
    Inventors: Johanna Eliasson, Ylva Eriksson, David Holmström, P. Christian Hulteberg, Hans T. Karlsson, Filip Nilsson, Frida Ojala, Johan Albert Arno Van Den Tillaart