Patents by Inventor Byung-Hwan Um

Byung-Hwan Um 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).

  • Recovery of acetic acid from wood extracts
    Patent number: 8785688
    Abstract: In a process for recovering acetic acid from a wood extract, an aqueous wood extract is provided that contains acetic acid and dissolved hemicellulose containing uronic acid. A water insoluble solvent containing an extractant for the acetic acid is also provided. In a preferred embodiment, the solvent is undecane and the extractant is trioctylphosphine oxide. The wood extract is contacted with the solvent and extractant in order to extract the acetic acid from the wood extract. The acetic acid is then recovered from the solvent and extractant.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: July 22, 2014
    Assignee: University of Maine System Board of Trustees
    Inventors: Adriaan van Heiningen, Herbert Sixta, Byung-Hwan Um, Peter van Walsum
  • RECOVERY OF ACETIC ACID FROM WOOD EXTRACTS
    Publication number: 20110263895
    Abstract: In a process for recovering acetic acid from a wood extract, an aqueous wood extract is provided that contains acetic acid and dissolved hemicellulose containing uronic acid. A water insoluble solvent containing an extractant for the acetic acid is also provided. In a preferred embodiment, the solvent is undecane and the extractant is trioctylphosphine oxide. The wood extract is contacted with the solvent and extractant in order to extract the acetic acid from the wood extract. The acetic acid is then recovered from the solvent and extractant.
    Type: Application
    Filed: October 31, 2008
    Publication date: October 27, 2011
    Inventors: Adriaan Van Heiningen, Herbert Sixta, Byung-Hwan Um, Peter Van Walsum