Patents by Inventor Bhuma Rajagopalan

Bhuma Rajagopalan 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: 20230235486
    Abstract: Disclosed herein are polyesters and fibers made therefrom. The fiber comprises a polymer, poly(trimethylene furandicarboxylate) (PTF), and PTF based copolymers.
    Type: Application
    Filed: March 31, 2023
    Publication date: July 27, 2023
    Inventors: Fredrik NEDERBERG, Bhuma RAJAGOPALAN
  • Publication number: 20220275538
    Abstract: Disclosed herein are polyesters and fibers made therefrom. The fiber comprises a polymer, poly(trimethylene furandicarboxylate) (PTF), and PTF based copolymers.
    Type: Application
    Filed: May 6, 2022
    Publication date: September 1, 2022
    Inventors: FREDRIK NEDERBERG, BHUMA RAJAGOPALAN
  • Publication number: 20220259168
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 18, 2022
    Inventors: Pranit S. METKAR, Ronnie OZER, Bhuma RAJAGOPALAN
  • Publication number: 20210309795
    Abstract: Disclosed herein are polyesters and articles made therefrom. The article comprising a substrate comprising a first surface and a second surface, the second surface in contact with an outside environment, wherein the substrate comprises a polymer comprising poly(trimethylene furandicarboxylate) (PTF), and wherein the polymer provides an improvement in gas barrier properties of the substrate as compared to a substrate comprising nascent poly(ethylene terephthalate) (PET).
    Type: Application
    Filed: June 18, 2021
    Publication date: October 7, 2021
    Inventors: FREDRIK NEDERBERG, BHUMA RAJAGOPALAN, JULIUS URADNISHECK
  • Patent number: 11028063
    Abstract: An integrated process is useful for producing 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof from a six-carbon sugar-containing feed. The process includes a) dehydrating a feed containing a six-carbon sugar unit, in the presence of a bromine source and of a solvent, to generate an oxidation feed that contains at least one of 5-hydroxymethylfurfural (HMF) and/or a derivative or derivatives of HMF in the solvent, together with at least one bromine containing species; b) contacting the oxidation feed from step (a) with a metal catalyst and with an oxygen source under oxidation conditions to produce an oxidation product mixture of at least FDCA and/or a derivative thereof, the solvent, and a residual catalyst; c) purifying and separating the mixture obtained in step (b) to obtain FDCA and/or a derivative thereof and the solvent; and d) recycling at least a portion of the solvent obtained in step (c) to step (a).
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: June 8, 2021
    Assignees: DUPONT INDUSTRIAL BIOSCIENCES USA, LLC, ARCHER-DANIELS-MIDLAND COMPANY
    Inventors: Stephen J. Howard, Kristina A. Kreutzer, Bhuma Rajagopalan, Eric R. Sacia, Alexandra Sanborn, Brennan Smith
  • Publication number: 20210024480
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: October 12, 2020
    Publication date: January 28, 2021
    Inventors: PRANIT S METKAR, RONNIE OZER, BHUMA RAJAGOPALAN
  • Patent number: 10865190
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: December 15, 2020
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Pranit S Metkar, Ronnie Ozer, Bhuma Rajagopalan
  • Publication number: 20200339527
    Abstract: An integrated process is useful for producing 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof from a six-carbon sugar-containing feed. The process includes a) dehydrating a feed containing a six-carbon sugar unit, in the presence of a bromine source and of a solvent, to generate an oxidation feed that contains at least one of 5-hydroxymethylfurfural (HMF) and/or a derivative or derivatives of HMF in the solvent, together with at least one bromine containing species; b) contacting the oxidation feed from step (a) with a metal catalyst and with an oxygen source under oxidation conditions to produce an oxidation product mixture of at least FDCA and/or a derivative thereof, the solvent, and a residual catalyst; c) purifying and separating the mixture obtained in step (b) to obtain FDCA and/or a derivative thereof and the solvent; and d) recycling at least a portion of the solvent obtained in step (c) to step (a).
    Type: Application
    Filed: July 9, 2020
    Publication date: October 29, 2020
    Inventors: Stephen J. HOWARD, Kristina A. Kreutzer, Bhuma Rajagopalan, Eric R. Sacia, Alexandra Sanborn, Brennan Smith
  • Patent number: 10745369
    Abstract: An integrated process is useful for producing 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof from a six-carbon sugar-containing feed. The process includes a) dehydrating a feed containing a six-carbon sugar unit, in the presence of a bromine source and of a solvent, to generate an oxidation feed that contains at least one of 5-hydroxymethylfurfural (HMF) and/or a derivative or derivatives of HMF in the solvent, together with at least one bromine containing species; b) contacting the oxidation feed from step (a) with a metal catalyst and with an oxygen source under oxidation conditions to produce an oxidation product mixture of at least FDCA and/or a derivative thereof, the solvent, and a residual catalyst: c) purifying and separating the mixture obtained in step (b) to obtain FDCA and/or a derivative thereof and the solvent; and d) recycling at least a portion of the solvent obtained in step (c) to step (a).
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: August 18, 2020
    Assignees: DUPONT INDUSTRIAL BIOSCIENCES USA, LLC, ARCHER DANIELS MIDLAND COMPANY
    Inventors: Stephen J. Howard, Kristina A. Kreutzer, Bhuma Rajagopalan, Eric R. Sacia, Alexandra Sanborn, Brennan Smith
  • Publication number: 20200231557
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: April 3, 2020
    Publication date: July 23, 2020
    Inventors: Pranit S. METKAR, Ronnie OZER, Bhuma RAJAGOPALAN
  • Publication number: 20200095218
    Abstract: An integrated process is useful for producing 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof from a six-carbon sugar-containing feed. The process includes a) dehydrating a feed containing a six-carbon sugar unit, in the presence of a bromine source and of a solvent, to generate an oxidation feed that contains at least one of 5-hydroxymethylfurfural (HMF) and/or a derivative or derivatives of HMF in the solvent, together with at least one bromine containing species; b) contacting the oxidation feed from step (a) with a metal catalyst and with an oxygen source under oxidation conditions to produce an oxidation product mixture of at least FDCA and/or a derivative thereof, the solvent, and a residual catalyst: c) purifying and separating the mixture obtained in step (b) to obtain FDCA and/or a derivative thereof and the solvent; and d) recycling at least a portion of the solvent obtained in step (c) to step (a).
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Inventors: Stephen J. HOWARD, Kristina A. Kreutzer, Bhuma Rajagopalan, Eric R. Sacia, Alexandra Sanborn, Brennan Smith
  • Patent number: 10538499
    Abstract: An integrated process is described for producing 2,5-furandicarboxylic acid and/or a derivative thereof from a six carbon sugar-containing feed, comprising: a) dehydrating a feed comprising a six-carbon sugar unit, in the presence of a bromine source and of a solvent, to generate an oxidation feed comprised of at least one of 5-hydroxymethylfurfural and/or a derivative or derivatives of 5-hydroxymethylfurfural in the solvent, together with at least one bromine containing species; b) contacting the oxidation feed from step (a) with a metal catalyst and with an oxygen source under oxidation conditions to produce an oxidation product mixture comprising 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof, the solvent, and a residual catalyst; c) purifying and separating the mixture obtained in step (b) to obtain FDCA and/or a derivative thereof and the solvent; and d) recycling at least a portion of the solvent obtained in step (c) to step (a).
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: January 21, 2020
    Assignees: DUPONT INDUSTRIAL BIOSCIENCES USA, LLC, ARCHER DANIELS MIDLAND COMPANY
    Inventors: Stephen J. Howard, Kristina A. Kreutzer, Bhuma Rajagopalan, Eric R. Sacia, Alexandra Sanborn, Brennan Smith
  • Publication number: 20190389826
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 26, 2019
    Inventors: Pranit S. METKAR, Ronnie OZER, Bhuma RAJAGOPALAN
  • Patent number: 10457657
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: October 29, 2019
    Assignees: DUPONT INDUSTRIAL BIOSCIENCES USA, LLC, ARCHER DANIELS MIDLAND COMPANY
    Inventors: Pranit S. Metkar, Ronnie Ozer, Bhuma Rajagopalan
  • Publication number: 20190300494
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: June 20, 2019
    Publication date: October 3, 2019
    Inventors: PRANIT S METKAR, Ronnie Ozer, Bhuma Rajagopalan
  • Publication number: 20190248954
    Abstract: Disclosed herein are polyesters and articles made therefrom. The article comprising a substrate comprising a first surface and a second surface, the second surface in contact with an outside environment, wherein the substrate comprises a polymer comprising poly(trimethylene furandicarboxylate) (PTF), and wherein the polymer provides an improvement in gas barrier properties of the substrate as compared to a substrate comprising nascent poly(ethylene terephthalate) (PET).
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: FREDRIK NEDERBERG, BHUMA RAJAGOPALAN, JULIUS URADNISHECK
  • Publication number: 20190249338
    Abstract: Disclosed herein are polyesters and fibers made therefrom. The fiber comprises a polymer, poly(trimethylene furandicarboxylate) (PTF), and PTF based copolymers.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Inventors: Fredrik Nederberg, Bhuma Rajagopalan
  • Publication number: 20190119238
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: December 21, 2018
    Publication date: April 25, 2019
    Inventors: PRANIT S. METKAR, Ronnie Ozer, Bhuma Rajagopalan
  • Publication number: 20190047973
    Abstract: A process for producing furan dicarboxylic acid or an ester thereof from a feedstock comprising hydroxymethyl furfural (HMF) and humins is disclosed. Humins are a byproduct from reactions forming HMF from sugars and are typically removed from the HMF prior to any further processing. A humins-containing HMF feedstock is utilized to produce furan dicarboxylic acids and ester substantially free from humins.
    Type: Application
    Filed: October 15, 2018
    Publication date: February 14, 2019
    Inventors: Pranit S. METKAR, Ronnie Ozer, Bhuma Rajagopalan
  • Patent number: 10087305
    Abstract: Disclosed herein are compositions and articles made therefrom, the compositions comprising poly(trimethylene-2,5-furandicarboxylate) and one or more of a plasticizer, a neutralized carboxylic acid salt or trisodium phosphate as a nucleating agent, and a copolyester derived from furandicarboxylic acid, 1,3 propanediol and at least one poly(alkylene ether) glycol (PAEG), the copolyester comprising a Furan-PAEG soft segment and a PTF hard segment.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 2, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Gordon Mark Cohen, Fredrik Nederberg, Bhuma Rajagopalan