Patents by Inventor Siegmar Maassen

Siegmar Maassen 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 treatment of wastewater from aldolization processes
    Patent number: 7943047
    Abstract: Process for the treatment of wastewater from an aldolization process which is contaminated with water-soluble and/or dispersed organic impurities by means of single-stage or multistage extraction with an organic liquid of the aldolization process wastewater which has been set to a pH of from 0 to 6, in which an organic liquid obtained by stripping of the acidified aldolization process wastewater or of the acidified and extracted aldolization process wastewater, condensation of the stripped compounds and phase separation of the condensate is used as extractant for the extraction of organic impurities from the acidified aldolization process wastewater and wastewater having a lower content of organic impurities than the aldolization process wastewater fed to the extraction is taken off from the stripping apparatus.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: May 17, 2011
    Assignee: BASF SE
    Inventors: Siegmar Maassen, Roland Krokoszinski, Detlef Kratz
  • Process for the Treatment of Wastewater From Aldolization Processes
    Publication number: 20080251458
    Abstract: Process for the treatment of wastewater from an aldolization process which is contaminated with water-soluble and/or dispersed organic impurities by means of single-stage or multistage extraction with an organic liquid of the aldolization process wastewater which has been set to a pH of from 0 to 6, in which an organic liquid obtained by stripping of the acidified aldolization process wastewater or of the acidified and extracted aldolization process wastewater, condensation of the stripped compounds and phase separation of the condensate is used as extractant for the extraction of organic impurities from the acidified aldolization process wastewater and wastewater having a lower content of organic impurities than the aldolization process wastewater fed to the extraction is taken off from the stripping apparatus.
    Type: Application
    Filed: September 25, 2006
    Publication date: October 16, 2008
    Applicant: BASF SE
    Inventors: Siegmar Maassen, Roland Krokoszinski, Detlef Kratz
  • Method of preparing low-sulphur aliphatic compounds
    Patent number: 6207043
    Abstract: Low-sulfur aliphatic compounds are obtained from olefin-rich starting materials contaminated with organic sulfur compounds.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: March 27, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Maximilian Vicari, Ekkehard Schwab, Marc Walter, Siegmar Maassen