Patents by Inventor Karl-Heinz Robeta

Karl-Heinz Robeta 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 preparation of alkanolamines having improved color quality
    Publication number: 20010031897
    Abstract: Preparation of alkanolamines having improved color quality by treating the alkanolamine with an effective amount of phosphorous acid or hypophosphorous acid or compounds thereof initially at elevated temperature over a period of at least 5 min (step a), and then distilling it in the presence of an effective amount of one of these phosphorus compounds (step b).
    Type: Application
    Filed: March 7, 2001
    Publication date: October 18, 2001
    Inventors: Gunther Ruider, Karl-Heinz Robeta, Johann-Peter Melder, Gerhard Schulz, Frank Gutschoven, Philip Buskens