Patents by Inventor Brad Zenthoefer

Brad Zenthoefer 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).

  • Methods for producing bioderived propylene glycol
    Patent number: 9533930
    Abstract: In the process of distilling a polyol product mixture including one or both of a biobased propylene glycol and a biobased ethylene glycol from the reaction of hydrogen with a biobased feed, it has been discovered that undesirable epoxides can form, and the present invention provides means for guarding against their formation, for removing epoxides which do form by particular methods of distilling, and for removing the epoxides from a finished, otherwise commercially acceptable biobased glycol product.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: January 3, 2017
    Inventors: Kevin J. Adlaf, Paul D. Bloom, William Chris Hoffman, Chicheng Ma, John G. Soper, Brad Zenthoefer
  • METHODS FOR PRODUCING BIODERIVED PROPYLENE GLYCOL
    Publication number: 20150152031
    Abstract: In the process of distilling a polyol product mixture including one or both of a biobased propylene glycol and a biobased ethylene glycol from the reaction of hydrogen with a biobased feed, it has been discovered that undesirable epoxides can form, and the present invention provides means for guarding against their formation, for removing epoxides which do form by particular methods of distilling, and for removing the epoxides from a finished, otherwise commercially acceptable biobased glycol product.
    Type: Application
    Filed: February 4, 2015
    Publication date: June 4, 2015
    Inventors: Kevin J. Adlaf, Paul D. Bloom, William Chris Hoffman, Chicheng Ma, John G. Soper, Brad Zenthoefer
  • METHODS FOR PRODUCING BIODERIVED PROPYLENE GLYCOL
    Publication number: 20140256991
    Abstract: In the process of distilling a polyol product mixture including one or both of a biobased propylene glycol and a biobased ethylene glycol from the reaction of hydrogen with a biobased feed, it has been discovered that undesirable epoxides can form, and the present invention provides means for guarding against their formation, for removing epoxides which do form by particular methods of distilling, and for removing the epoxides from a finished, otherwise commercially acceptable biobased glycol product.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 11, 2014
    Applicant: ARCHER DANIELS MIDLAND COMPANY
    Inventors: Kevin J. Adlaf, Paul D. Bloom, William Chris Hoffman, Chicheng Ma, John G. Soper, Brad Zenthoefer
  • METHODS FOR PRODUCING BIODERIVED PROPYLENE GLYCOL
    Publication number: 20140039224
    Abstract: In the process of distilling a polyol product mixture including one or both of a biobased propylene glycol and a biobased ethylene glycol from the reaction of hydrogen with a biobased feed, it has been discovered that undesirable epoxides can form, and the present invention provides means for guarding against their formation, for removing epoxides which do form by particular methods of distilling, and for removing the epoxides from a finished, otherwise commercially acceptable biobased glycol product.
    Type: Application
    Filed: February 27, 2012
    Publication date: February 6, 2014
    Applicant: Archer Daniels Midland Company
    Inventors: Kevin J. Adlaf, Paul D. Bloom, William Chris Hoffman, Chicheng Ma, John G. Soper, Brad Zenthoefer
  • Preparation of Derivative of Polyhydric Alcohols
    Publication number: 20080274019
    Abstract: A method for converting a polyhydric alcohol into propylene glycol and butanediols is disclosed. Also disclosed are methods for converting polyhydric alcohols into three-carbon products and four-carbon products. Also disclosed are methods for maximizing conversion of polyhydric alcohols and minimizing formation of reaction products that are difficult to remove from the desired product. In other embodiments, methods are described to optimize use of reactants, including hydrogen, in hydrogenolysis of polyhydric alcohols.
    Type: Application
    Filed: April 23, 2008
    Publication date: November 6, 2008
    Inventors: Joseph Robert Beggin, Thomas P. Binder, Ahmad K. Hilaly, Lawrence P. Karcher, Brad Zenthoefer