Patents by Inventor Maarten P. ter Weeme

Maarten P. ter Weeme 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).

  • Color stabilization of amines
    Patent number: 7169268
    Abstract: The present invention concerns a process for providing tertiary amine products which are color-stable, and have a greatly reduced tendency to take on color during their storage. According to the invention, an ethyleneamine derivative is added to the distillation pot prior to or during the distillation of the tertiary amine product. Preferably, the ethyleneamine derivative has a higher boiling point than the desired tertiary amine product so as to preclude the ethyleneamine from distilling over with the tertiary amine.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: January 30, 2007
    Assignee: Huntsman Petrochemical Corporation
    Inventors: Wei-Yang Su, Mark L. Posey, Maarten P. ter Weeme
  • Color stabilization of amines
    Publication number: 20040000471
    Abstract: The present invention concerns a process for providing tertiary amine products which are color-stable, and have a greatly reduced tendency to take on color during their storage. According to the invention, an ethyleneamine derivative is added to the distillation pot prior to or during the distillation of the tertiary amine product. Preferably, the ethyleneamine derivative has a higher boiling point than the desired tertiary amine product so as to preclude the ethyleneamine from distilling over with the tertiary amine.
    Type: Application
    Filed: June 6, 2003
    Publication date: January 1, 2004
    Applicant: Huntsman Petrochemical Corporation
    Inventors: Wei-Yang Su, Mark L. Posey, Maarten P. ter Weeme