Patents by Inventor Karl-Heinz Schonwalder

Karl-Heinz Schonwalder 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 ether carboxylic acids from carbohydrates and derivatives thereof and their use
    Patent number: 5223642
    Abstract: A process for the preparation of ether carboxylic acids by ethoxylation of carbohydrates followed by catalytic oxidation and the use of the products in detergents or cleaning agents.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: June 29, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Karl-Heinz Schonwalder
  • Process for the preparation of a mixture of sucrose oxidation products and the use thereof
    Patent number: 5082504
    Abstract: A process for the preparation of a mixture of sucrose oxidation products which contains a salt of sucrosetricarboxylic acid and which is obtained by reaction of sucrose with oxygen in an aqueous medium in the presence of a platinum metal/active carbon catalyst at elevated temperatures and neutralization of the reaction product to convert into the salt form, which comprises the reaction being carried out discontinuously, the starting materials being heated stepwise over the course of several hours from room temperature up to 60.degree. to 95.degree. C. and then the reaction product being isolated where appropriate.The oxidation products obtained in this way have, in particular, improved washing properties.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: January 21, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ernst I. Leupold, Karl-Heinz Schonwalder, Wolfram Fritsche-Lang, Merten Schlingmann, Adolf Linkies, Werner Gohla, Franz-Josef Dany
  • Process for the separation of butanol and butoxyacetaldehyde
    Patent number: 4986885
    Abstract: A process for the separation of butanol and butoxyacetaldehyde which involves subjecting a composition which contains these two compounds to a distillation at a pressure of at most 660 mbar. According to a special embodiment the composition to be distilled contains as essential components water, butanol, butoxyacetaldehyde, butylglycol and, if desired, also butyraldehyde.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: January 22, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Robert K. Driscoll, Ingo Leupold, Karl-Heinz Schonwalder