Patents by Inventor James A. Dumesic

James A. Dumesic 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).

  • Publication number: 20210130269
    Abstract: A method of making of 1,2,5,6-hexanetetrol (“tetrol”). The method includes the steps of contacting a reaction solution containing water as well as levoglucosenone, dihydrolevoglucosenone, and/or levoglucosanol, with a catalyst containing metal and acid functionalities, at temperature of from about 100° C. to about 175° C., and a hydrogen partial pressure of from about 1 bar to about 50 bar (about 0.1 MPa to about 5 MPa), and for a time wherein at least a portion of the reactant is converted into 1,2,5,6-hexanetetrol.
    Type: Application
    Filed: April 19, 2019
    Publication date: May 6, 2021
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Siddarth H. Krishna, George W. Huber, James A. Dumesic
  • Patent number: 10781195
    Abstract: A method to produce 5-hydroxymethylfurfural (HMF) from C6 carbohydrates. The method includes the steps of reacting a reactant comprising at least one C6 carbohydrate, in a reaction mixture comprising at least about 5% (v/v) water, a polar, aprotic solvent, and an acid, for a time, at a temperature, and at a hydrogen ion concentration wherein at least a portion of the C6 carbohydrate present in the reactant is converted to 5-hydroxymethyl furfural (“HMF”).
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: September 22, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Ali Hussain Motagamwala
  • Publication number: 20200039947
    Abstract: A method to produce 5-hydroxymethylfurfural (HMF) from C6 carbohydrates. The method includes the steps of reacting a reactant comprising at least one C6 carbohydrate, in a reaction mixture comprising at least about 5% (v/v) water, a polar, aprotic solvent, and an acid, for a time, at a temperature, and at a hydrogen ion concentration wherein at least a portion of the C6 carbohydrate present in the reactant is converted to 5-hydroxymethyl furfural (“HMF”).
    Type: Application
    Filed: July 31, 2018
    Publication date: February 6, 2020
    Inventors: James A. Dumesic, Ali Hussain Motagamwala
  • Patent number: 10428397
    Abstract: A process to produce an aqueous solution of carbohydrates that contains C6-sugar-containing oligomers, C6 sugar monomers, C5-sugar-containing oligomers, C5 sugar monomers, or any combination thereof is presented. The process includes the steps of reacting biomass or a biomass-derived reactant with a solvent system including a lactone and water, and an acid catalyst. The reaction yields a product mixture containing water-soluble C6-sugar-containing oligomers, C6-sugar monomers, C5-sugar-containing oligomers, C5-sugar monomers, or any combination thereof.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 1, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Jeremy S. Luterbacher
  • Patent number: 10183904
    Abstract: A method of making 1,5-pentanediol from tetrahydrofurfural alcohol. The method includes the steps of dehydrating tetrahydrofurfural alcohol (THFA) to dihydropyran (DHP); hydrating at least a portion of the DHP to 2-hydroxy-tetrahydropyran (2-HY-THP) in the absence of homogeneous acid; and hydrogenating at least a portion of the 2-HY-THP to 1,5-pentanediol. The method can be conducted entirely in the absence of noble metal catalysts.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: January 22, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: George Willis Huber, James A. Dumesic, Kevin J. Barnett, Zach J. Brentzel
  • Patent number: 10137434
    Abstract: A method for stabilizing a metal or metal-containing particle supported on a surface is described, along with the resulting composition of matter. The method includes the steps of depositing upon the surface a protective thin film of a material of sufficient thickness to overcoat the metal or metal-containing particle and the surface, thereby yielding an armored surface; and then calcining the armored surface for a time and at a temperature sufficient to form channels in the protective thin film, wherein the channels so formed expose a portion of the metal- or metal-containing particle to the surrounding environment. Also described is a method of performing a heterogeneous catalytic reaction using the stabilized, supported catalyst.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 27, 2018
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Brandon J. O'Neill
  • Publication number: 20180273896
    Abstract: A method of growing a microorganism by culturing the microorganism in a an aqueous solution of carbohydrates containing C6-sugar monomers or C5-sugar monomers, wherein the aqueous solution of carbohydrates is made by reacting biomass or a biomass-derived reactant with a solvent system including a lactone and water, and an acid catalyst. The reaction yields a product mixture containing water-soluble C6-sugar-containing oligomers, C6-sugar monomers, C5-sugar-containing oligomers, C5-sugar monomers, or any combination thereof. The product mixture is then partitioned or extracted to yield an aqueous layer containing the carbohydrates and a substantially immiscible organic layer containing the lactone. The aqueous layer is used for growing the microorganisms.
    Type: Application
    Filed: May 29, 2018
    Publication date: September 27, 2018
    Inventors: James A. Dumesic, Brian Pfleger, Jeremy S. Luterbacher, Jacqueline Rand
  • Patent number: 10077224
    Abstract: A method of making 1,5-pentanediol from tetrahydrofurfural alcohol. The method includes the steps of dehydrating tetrahydrofurfural alcohol (THFA) to dihydropyran (DHP); hydrating at least a portion of the DHP to 2-hydroxy-tetrahydropyran (2-HY-THP) in the presence of a solid acid catalyst; and hydrogenating at least a portion of the 2-HY-THP to 1,5-pentanediol. The method can be conducted entirely in the absence of noble metal catalysts.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: September 18, 2018
    Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: George Willis Huber, James A. Dumesic, Kevin J. Barnett
  • Patent number: 9937490
    Abstract: A high surface area catalyst with a mesoporous support structure and a thin conformal coating over the surface of the support structure. The high surface area catalyst support is adapted for carrying out a reaction in a reaction environment where the thin conformal coating protects the support structure within the reaction environment. In various embodiments, the support structure is a mesoporous silica catalytic support and the thin conformal coating comprises a layer of metal oxide resistant to the reaction environment which may be a hydrothermal environment.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: April 10, 2018
    Assignee: UChicago Argonne, LLC
    Inventors: Jeffrey W. Elam, Christopher L. Marshall, Joseph A. Libera, James A. Dumesic, Yomaira J. Pagan-Torres
  • Publication number: 20170298458
    Abstract: A process to produce an aqueous solution of carbohydrates that contains C6-sugar-containing oligomers, C6 sugar monomers, C5-sugar-containing oligomers, C5 sugar monomers, or any combination thereof is presented. The process includes the steps of reacting biomass or a biomass-derived reactant with a solvent system including a lactone and water, and an acid catalyst. The reaction yields a product mixture containing water-soluble C6-sugar-containing oligomers, C6-sugar monomers, C5-sugar-containing oligomers, C5-sugar monomers, or any combination thereof.
    Type: Application
    Filed: June 28, 2017
    Publication date: October 19, 2017
    Inventors: James A. Dumesic, Jeremy S. Luterbacher
  • Patent number: 9725776
    Abstract: A process to produce an aqueous solution of carbohydrates that contains C6-sugar-containing oligomers, C6 sugar monomers, C5-sugar-containing oligomers, C5 sugar monomers, or any combination thereof is presented. The process includes the steps of reacting biomass or a biomass-derived reactant with a solvent system including a lactone and water, and an acid catalyst. The reaction yields a product mixture containing water-soluble C6-sugar-containing oligomers, C6-sugar monomers, C5-sugar-containing oligomers, C5-sugar monomers, or any combination thereof. A solute is added to the product mixture to cause partitioning of the product mixture into an aqueous layer containing the carbohydrates and a substantially immiscible organic layer containing the lactone.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: August 8, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Jeremy S. Luterbacher
  • Publication number: 20170210688
    Abstract: A method of making 1,5-pentanediol from tetrahydrofurfural alcohol. The method includes the steps of dehydrating tetrahydrofurfural alcohol (THFA) to dihydropyran (DHP); hydrating at least a portion of the DHP to 2-hydroxy-tetrahydropyran (2-HY-THP) in the absence of homogeneous acid; and hydrogenating at least a portion of the 2-HY-THP to 1,5-pentanediol. The method can be conducted entirely in the absence of noble metal catalysts.
    Type: Application
    Filed: January 22, 2016
    Publication date: July 27, 2017
    Inventors: George Willis Huber, James A. Dumesic, Kevin J. Barnett, Zach J. Brentzel
  • Patent number: 9688845
    Abstract: A method to produce an aqueous solution of carbohydrates containing C5- and/or C6-sugar-containing oligomers and/or C5- and/or C6-sugar monomers in which biomass or a biomass-derived reactant is reacted with a solvent system having an organic solvent, and organic co-solvent, and water, in the presence of an acid. The method produces the desired product, while a substantial portion of any lignin present in the reactant appears as a precipitate in the product mixture.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: June 27, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Ali Hussain Motagamwala
  • Patent number: 9617234
    Abstract: A process to produce furandicarboxylic acid (FDCA). The process includes the steps of reacting a C6 sugar-containing reactant in a reaction solution comprising a first organic solvent selected from the group consisting of beta-, gamma-, and delta-lactones, hydrofurans, hydropyrans, and combinations thereof, in the presence of an acid catalyst for a time and under conditions wherein at least a portion of the C6 sugar present in the reactant is converted to 5-(hydroxymethyl)furfural (HMF); oxidizing the HMF into FDCA with or without separating the HMF from the reaction solution; and extracting the FDCA by adding an aprotic organic solvent having a dipole moment of about 1.0 D or less to the reaction solution.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: April 11, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Ali Hussain Motagamwala
  • Publication number: 20160361708
    Abstract: A method for stabilizing a metal or metal-containing particle supported on a surface is described, along with the resulting composition of matter. The method includes the steps of depositing upon the surface a protective thin film of a material of sufficient thickness to overcoat the metal or metal-containing particle and the surface, thereby yielding an armored surface; and then calcining the armored surface for a time and at a temperature sufficient to form channels in the protective thin film, wherein the channels so formed expose a portion of the metal- or metal-containing particle to the surrounding environment. Also described is a method of performing a heterogeneous catalytic reaction using the stabilized, supported catalyst.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 15, 2016
    Inventors: James A. Dumesic, Brandon J. O'Neill
  • Publication number: 20160304704
    Abstract: A method to produce an aqueous solution of carbohydrates containing C5- and/or C6-sugar-containing oligomers and/or C5- and/or C6-sugar monomers in which biomass or a biomass-derived reactant is reacted with a solvent system having an organic solvent, and organic co-solvent, and water, in the presence of an acid. The method produces the desired product, while a substantial portion of any lignin present in the reactant appears as a precipitate in the product mixture.
    Type: Application
    Filed: April 14, 2015
    Publication date: October 20, 2016
    Inventors: James A. Dumesic, Ali Hussain Motagamwala
  • Publication number: 20160185794
    Abstract: A method to produce 5-hydroxymethylfurfural (HMF) is described in which a reactant including cellulose, lignocellulose, or a combination thereof, in a reaction mixture of a polar, aprotic solvent and an acid is reacted for a time, at a temperature, and at a hydrogen ion concentration wherein at least a portion of the cellulose or lignocellulose present in the reactant is converted to HMF. The reaction mixture is initially substantially devoid of water. As the reaction proceeds, dehydration of intermediates causes the water concentration in the reaction mixture to rise to no more than about 2.0 wt % water.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Inventors: George W. Huber, Fei Cao, James A. Dumesic, Thomas J. Schwartz
  • Patent number: 9376451
    Abstract: A method to produce 5-hydroxymethylfurfural (HMF) is described in which a reactant including cellulose, lignocellulose, or a combination thereof, in a reaction mixture of a polar, aprotic solvent and an acid is reacted for a time, at a temperature, and at a hydrogen ion concentration wherein at least a portion of the cellulose or lignocellulose present in the reactant is converted to HMF. The reaction mixture is initially substantially devoid of water. As the reaction proceeds, dehydration of intermediates causes the water concentration in the reaction mixture to rise to no more than about 2.0 wt % water.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: June 28, 2016
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: George W. Huber, Fei Cao, James A. Dumesic, Thomas J. Schwartz
  • Patent number: 9376411
    Abstract: A method to produce levulinic acid (LA) and gamma-valerolactone (GVL) from biomass-derived cellulose or lignocellulose by selective extraction of LA using GVL and optionally converting the LA so isolated into GVL, with no purifications steps required to yield the GVL.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: June 28, 2016
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: James A. Dumesic, Stephanie G. Wettstein, David Martin Alonso, Elif Ispir Gurbuz
  • Patent number: 9359650
    Abstract: Described is a method of processing biomass to separate it into a liquid fraction enriched in solubilized C5-sugar-containing oligomers and C-5 sugar monomers and a solid fraction enriched in substantially insoluble cellulose and C6-sugar-containing oligomers. The method includes the steps of reacting biomass with a solvent system comprising water, at least one lactone, or at least one furan, or at least one cyclic ether, and at least one acid, for a time and at a temperature to yield the liquid and solid fractions. The liquid and solid fractions may then be separated. Gamma-valeroloactone is a preferred lactone for use in the solvent system. Tetrahydrofuran is a preferred furan species for use in the solvent system.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: June 7, 2016
    Assignees: Wisconsin Alumni Research Foundation, Glucan Biorenewables LLC
    Inventors: James A. Dumesic, David Martin Alonso, Jeremy Scott Luterbacher