Patents by Inventor Martin De Boer

Martin De Boer 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).

  • Polycarboxylic acid production system employing hot liquor removal downstream of oxidative digestion
    Publication number: 20070208192
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes an optimized post-digestion cooling stage that provides a TPA product having enhanced purity, while minimizing costs associated with removing impurities from recycled solvent.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Alan Wonders, Ronald Sheppard, Martin De Boer
  • Polycarboxylic acid production system employing enhanced multistage oxidative digestion
    Publication number: 20070208191
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes a multi-stage oxidative digestion system for processing an improved initial slurry from primary oxidation. The multi-stage digestion system is capable of adequately purifying the improved initial slurry without requiring significant liquor exchange between primary oxidation and oxidative digestion.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Alan Wonders, Ronald Sheppard, Thomas Woodruff, Martin De Boer, Raymond Fogle
  • Polycarboxylic acid production system employing cooled mother liquor from oxidative digestion as feed to impurity purge system
    Publication number: 20070208193
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. A solvent purification system is employed to remove of at least one aromatic impurity present in a solvent purification feed. At least about 20 weight percent of the solvent purification feed originates from a cooled, post-digestion, TPA-containing slurry.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Alan Wonders, Ronald Sheppard, Martin De Boer, Lee Partin, Raymond Fogle
  • Polycarboxylic acid production system employing oxidative digestion with reduced or eliminated upstream liquor exchange
    Publication number: 20070208190
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system minimizes or eliminates the need for liquor exchange upstream of oxidative digestion and/or upstream of substantial cooling of the TPA-containing slurry.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Alan Wonders, Ronald Sheppard, Martin De Boer, Raymond Fogle, Marcel de Vreede
  • Method for oxidizing a slurry composition in a post oxidation zone in the presence of added steam
    Publication number: 20060084824
    Abstract: The present invention relates to a process for oxidizing a slurry composition in a post oxidation zone in the presence of added steam. More specifically, the present invention relates to a process for oxidizing a crude terephthalic acid composition in a post oxidation zone in the presence of added steam in a process for the production of a crystallized post oxidation composition.
    Type: Application
    Filed: October 20, 2005
    Publication date: April 20, 2006
    Inventors: Robert Lin, Marcel de Vreede, Johannes Sluijmers, Martin De Boer, Thomas Woodruff
  • Method for heating a crude carboxylic acid slurry in a post oxidation zone by the addition of steam
    Publication number: 20040215036
    Abstract: The present invention relates to a process for heating a secondary oxidizer with steam. More specifically, the present invention relates to a process for heating a secondary oxidizer with steam in a process for the production of a crystallized product.
    Type: Application
    Filed: April 25, 2003
    Publication date: October 28, 2004
    Inventors: Robert Lin, Marcel de Vreede, John Sluijmers, Martin de Boer, Thomas Earl Woodruff