Patents by Inventor Hilde Odile Jozefine Lemmens

Hilde Odile Jozefine Lemmens 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 production of 2-keto-D-glusonic acid
    Patent number: 6018034
    Abstract: This process for the production of 2-keto-D-gluconic acid starts from D-glucose. D-glucose is catalytically oxidised using molecular oxygen in a one-pot process. The oxidation is performed in the presence of well-known Pt/Pb catalysts. The initial reaction to D-gluconic acid is performed at constant pH between 7 and 10. There after the reaction is continued without pH control. This process results in a high selectivity compared with known processes.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: January 25, 2000
    Assignee: Cerestar Holdings B.V.
    Inventors: Myriam Elseviers, Sonia Marianne Jeannine Coomans, Hilde Odile Jozefine Lemmens, Harald Wilhelm Walter Roper
  • Polyhydroxycarboxylic acid composition derived from maltodextrins by oxidation with an oxygen containing oxidant
    Patent number: 5866533
    Abstract: The present invention a polyhydroxycarboxylic acid composition derived from maltodextrins by oxidation with an oxygen containing oxidant. The invention also relates to a process for the production of oxyacids from carbohydrates by oxidation with an oxygen containing oxidant. More particularly the present invention relates to the oxidation of starch hydrolysates or maltodextrins having a DE of less than 20. The invention further relates to oxidation products and the use thereof.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: February 2, 1999
    Assignee: Cerestar Holding B.V.
    Inventors: Roland Herwig Friedrich Beck, Hilde Odile Jozefine Lemmens
  • Process for the production of arabinitol
    Patent number: 5831078
    Abstract: A method is disclosed for producing a pentitol. The disclosed method more particularly relates to producing arabinitol from hexoses, e.g. galactose and/or glucose, and/or fructose, or lactose hydrolysate, or invert sugar, or starch hydrolysates. The hexose is oxidatively decarboxylated to a C.sub.5 -aldonic acid which is thereafter catalytically hydrogenated to obtain the desired arabinitol.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: November 3, 1998
    Assignee: Cerestar Holding B.V.
    Inventors: Myriam Elseviers, Hilde Odile Jozefine Lemmens, Sonia Marianne Jeannine Coomans, Harald Wilhelm Walter Roper
  • Method for decarbonylation of sugars
    Patent number: 5739303
    Abstract: The present invention discloses a method for direct decarbonylation of sugars. The method is based on the conversion of the sugars in the presence of a phosphine metal complex. These complexes are added in catalytic amounts if at the same time urea or an azide such as DPPA (diphenylphosphorylazide) or sodium azide is added. Through the use of other ligands the decarbonylation reaction can also be performed in water.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: April 14, 1998
    Assignee: Cerestar Holding B.V.
    Inventors: Roland Herwig Friedrich Beck, Myriam Elseviers, Hilde Odile Jozefine Lemmens