Patents by Inventor Steven A. Donen

Steven A. Donen 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).

  • Nitric acid oxidation processes
    Patent number: 9758462
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: September 12, 2017
    Assignee: RIVERTOP RENEWABLES, INC.
    Inventors: Steven Donen, Kirk Hash, Tyler Smith, Keith Jensen
  • Nitric acid oxidation process
    Patent number: 9670124
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: June 6, 2017
    Assignee: RIVERTOP RENEWABLES, INC.
    Inventors: Steven Donen, Keith Jensen
  • Methods for the manufacture of acetals and ketals, and the acetals and ketals produced thereby
    Patent number: 9593093
    Abstract: A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: March 14, 2017
    Assignee: GFBIOCHEMICALS LIMITED
    Inventors: Brian D. Mullen, Marc D. Scholten, Andrew J. Louwagie, Steven A. Donen, Feng Jing, Vivek Badarinarayana
  • OXIDATION PROCESS
    Publication number: 20160237016
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Application
    Filed: April 21, 2016
    Publication date: August 18, 2016
    Inventors: Steven Donen, Kirk Hash, Tyler Smith
  • Oxidation process
    Patent number: 9346736
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: May 24, 2016
    Assignee: Rivertop Renewables, Inc.
    Inventors: Steven Donen, Kirk Hash, Tyler Smith
  • NITRIC ACID OXIDATION PROCESSES
    Publication number: 20160039735
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Application
    Filed: October 20, 2015
    Publication date: February 11, 2016
    Inventors: Steven Donen, Kirk Hash, Tyler Smith, Keith Jensen
  • Nitric acid oxidation processes
    Patent number: 9187398
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: November 17, 2015
    Assignee: Rivertop Renewables, Inc.
    Inventors: Steven Donen, Kirk Hash, Tyler Smith, Keith Jensen
  • METHODS FOR THE MANUFACTURE OF ACETALS AND KETALS, AND THE ACETALS AND KETALS PRODUCED THEREBY
    Publication number: 20150080585
    Abstract: A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Inventors: BRIAN D. MULLEN, MARC D. SCHOLTEN, ANDREW J. LOUWAGIE, STEVEN A. DONEN, FENG JING, VIVEK BADARINARAYANA
  • OXIDATION PROCESS
    Publication number: 20140275621
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Inventors: Steven Donen, Kirk Hash, Tyler Smith
  • NITRIC ACID OXIDATION PROCESSES
    Publication number: 20140275623
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Inventors: Steven Donen, Kirk Hash, Tyler Smith, Keith Jensen
  • NITRIC ACID OXIDATION PROCESS
    Publication number: 20140275622
    Abstract: A process utilizing nitric acid and oxygen as co-oxidants to oxidize aldehydes, alcohols, polyols, preferably carbohydrates, specifically reducing sugars to produce the corresponding carboxylic acids.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Inventors: Steven Donen, Keith Jensen
  • METHODS FOR THE MANUFACTURE OF ACETALS AND KETALS, AND THE ACETALS AND KETALS PRODUCED THEREBY
    Publication number: 20120035376
    Abstract: A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 9, 2012
    Applicant: SEGETIS, INC.
    Inventors: Brian D. Mullen, Marc D. Scholten, Andrew J. Louwagie, Steven A. Donen, Feng Jing, Vivek Badarinarayana