Patents by Inventor Rolf Ramsteiner

Rolf Ramsteiner 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).

  • Patent number: 4728435
    Abstract: An aqueous glyoxal solution is decolorized by a process in which the said solution is passed over granulated active carbon which is arranged in a fixed bed and whose differential pore radius distribution has a maximum of from 10 to 100 A, the Peclet number being from 500 to 5000, the decolorized glyoxal solution is discharged, the active carbon bed is then regenerated by treating it with an aqueous solution of an alkaline agent and then with an aqueous acid, and further glyoxal solution to be decolorized is passed over the active carbon regenerated in this manner.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: March 1, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenther Mueller, Rolf Ramsteiner, Fritz Graf, Leopold Hupfer