Patents by Inventor Andreas Johannes Biermans

Andreas Johannes Biermans 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 separating NH, and optionally also COand HO, from a mixture containing NH, COand HO
    Patent number: 7407532
    Abstract: The invention relates to a process for separating NH3 from a mixture containing NH3, CO2 and H2O which comprises an NH3 rectification step carried out in a NH3 separation device to which one or more streams containing NH3, CO2 and H2O including the mixture, are supplied, with a stream consisting substantially of gaseous NH3 being formed in the NH3 separation device, separated from the mixture and discharged. In the process according to the invention a condensation step is carried out on at least one of the stream consisting substantially of gaseous NH3 or the one or more streams containing NH3, CO2 and H2O supplied to the NH3 separation device, in which at least a part of the existing CO2 is converted to a liquid phase.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: August 5, 2008
    Assignee: DSM IP Assets B.V.
    Inventors: Andreas Johannes Biermans, Kees Jonckers, Johannes Henricus Mennen, Nora Anna De Wit, Herbert Willem Gerrit Hooijkaas, Bastiaan Renè Agnes Marie Van De Kerkhove
  • Process for the preparation of urea
    Patent number: 6855846
    Abstract: Process for the preparation of urea from ammonia and carbon dioxide in which all or part of the liquid ammonia needed for the process is supplied to the high-pressure scrubber in such a way that it is in direct contact with the other streams supplied to this scrubber. In particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea synthesis reactor. More in particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea reactor and with the carbamate stream, which is transferred from the low-pressure urea recovery section.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: February 15, 2005
    Assignee: DSM IP Assets B.V.
    Inventors: Andreas Johannes Biermans, Kees Jonckers
  • Process for the preparation of urea
    Publication number: 20040054228
    Abstract: Process for the preparation of urea from ammonia and carbon dioxide in which all or part of the liquid ammonia needed for the process is supplied to the high-pressure scrubber in such a way that it is in direct contact with the other streams supplied to this scrubber. In particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea synthesis reactor. More in particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea reactor and with the carbamate stream, which is transferred from the low-pressure urea recovery section.
    Type: Application
    Filed: October 6, 2003
    Publication date: March 18, 2004
    Inventors: Andreas Johannes Biermans, Kees Jonckers