Patents by Inventor Maria Louisa Christina Dsinter-De Hondt

Maria Louisa Christina Dsinter-De Hondt 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 recovering and purifying caprolactam from an organic solvent
    Patent number: 6849731
    Abstract: Process for recovering caprolactam from a solution comprising caprolactam dissolved in an organic solvent, said process comprising: a) washing the solution with water or an aqueous alkaline solution, resulting in a washed solution comprising caprolactam and organic solvent and in a washing residue, b) evaporating organic solvent from the washed solution, resulting in caprolactam product, c) optionally, hydrogenating the caprolactam product, d) optionally, evaporating water from the caprolactam product, e) distilling the caprolactam product to recover caprolactam and a distillation residue, f) extracting the distillation residue with an organic solvent in the presence of water to obtain (i) an extract comprising caprolactam dissolved in organic solvent and (ii) an aqueous effluent, and g) recycling the extract to step a) or b).
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: February 1, 2005
    Assignee: DSM IP Assets B.V.
    Inventors: Maria Louisa Christina Dsinter-De Hondt, Joannes Albertus Wilhelmus Lemmens
  • Process for recovering and purifying caprolactam from an organic solvent
    Publication number: 20040110943
    Abstract: Process for recovering caprolactam from a solution comprising caprolactam dissolved in an organic solvent, said process comprising:
    Type: Application
    Filed: January 14, 2004
    Publication date: June 10, 2004
    Inventors: Maria Louisa Christina Dsinter-De Hondt, Joannes Albertus Wilhelmus Lemmens