Patents by Inventor Liane Deusser

Liane Deusser 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 acetone-cyanhydrin
    Patent number: 6417385
    Abstract: Acetone-cyanhydrin can be produced in a gas-liquid reactor from a hydrogen cyanide-containing gas, especially the crude gas originating from a methane-ammonia (BMA) or Andrussow process, and acetone in the presence of a base. The aim of the invention is to overcome the disadvantages of the methods for producing acetone-cyanhydrin known from the art. To this end, the gaseous phase removed from the reactor is liberated from the unreacted acetone and hydrogen cyanide in a gas purifier that is operated with a high-boiling solvent, especially with stabilized acetone-cyanhydrin, and the washed phase is fed to the gas-liquid reactor.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: July 9, 2002
    Assignee: Degussa AG
    Inventors: Walter Börner, Liane Deusser, Ralph Marquardt, Rudolf Vanheertum, Karl-Heinz Vieweg
  • Process for the preparation of 3-hydroxypropanal
    Patent number: 6284930
    Abstract: 3-Hydroxypropanal is prepared by reacting acrolein with water under pressure and in the presence of an ion exchange resin while adding a carboxylic acid to the reaction mixture.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: September 4, 2001
    Assignee: E.I. Du Pont de Nemours and Company
    Inventors: Thomas Haas, Liane Deusser, Torsten Hahm, Willi Hofen, Rudolf Vanheertum