Patents by Inventor Silke Simon

Silke Simon 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 continuously preparing N-ethyl-2-pyrrolidone (NEP)
    Patent number: 7994350
    Abstract: Process for the continuous preparation of N-ethyl-2-pyrrolidone (NEP) by reacting gamma-butyrolactone (GBL) with monoethylamine (MEA) in the liquid phase, wherein GBL and MEA are used in a molar ratio in the range from 1:1.08 to 1:2 an the reaction is carried out at a temperature in the range from 320 to 420° C. and an absolute pressure in the range from 70 to 120 bar.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: August 9, 2011
    Assignee: BASF SE
    Inventors: Helmut Schmidtke, Ralph Versch, Silke Simon, Karl Ott, Ronald Drews, Stephanie Mollner
  • PROCESS FOR CONTINUOUSLY PREPARING N-ETHYL-2-PYRROLIDONE (NEP)
    Publication number: 20090187030
    Abstract: Process for the continuous preparation of N-ethyl-2-pyrrolidone (NEP) by reacting gamma-butyrolactone (GBL) with monoethylamine (MEA) in the liquid phase, wherein GBL and MEA are used in a molar ratio in the range from 1:1.08 to 1:2 an the reaction is carried out at a temperature in the range from 320 to 420° C. and an absolute pressure in the range from 70 to 120 bar.
    Type: Application
    Filed: May 10, 2007
    Publication date: July 23, 2009
    Applicant: BASF SE
    Inventors: Helmut Schmidtke, Ralph Versch, Silke Simon, Karl Ott, Ronald Drews, Stephanie Mollner