Patents by Inventor Tonia Kretz

Tonia Kretz 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).

  • Method of producing neopentyl glycol
    Patent number: 8394998
    Abstract: The present invention relates to a method of producing neopentyl glycol by addition of isobutyraldehyde and formaldehyde in the presence of a tertiary alkylamine as catalyst to give the hydroxypivalinaldehyde with subsequent liquid phase hydrogenation in the presence of a nickel catalyst at a temperature of 80 to 180° C. and at a pressure of 6 to 18 MPa in the presence of an aliphatic alcohol and in the presence of water.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: March 12, 2013
    Assignee: Oxea GmbH
    Inventors: Kurt Schalapski, Tonia Kretz, Thorsten Kreickmann, Peter Heymanns, Rainer Lukas, Rolf-Peter Schulz
  • METHOD OF PRODUCING NEOPENTYL GLYCOL
    Publication number: 20110098515
    Abstract: The present invention relates to a method of producing neopentyl glycol by addition of isobutyraldehyde and formaldehyde in the presence of a tertiary alkylamine as catalyst to give the hydroxypivalinaldehyde with subsequent liquid phase hydrogenation in the presence of a nickel catalyst at a temperature of 80 to 180° C. and at a pressure of 6 to 18 MPa in the presence of an aliphatic alcohol and in the presence of water.
    Type: Application
    Filed: June 12, 2009
    Publication date: April 28, 2011
    Inventors: Kurt Schalapski, Tonia Kretz, Thosrten Kreickmann, Peter Heymanns, Rainer Lukas, Rolf-Peter Schulz