Patents by Inventor Hairong Guan

Hairong Guan 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).

  • Production of terephthalic acid via reductive coupling of propiolic acid or propiolic acid derivatives
    Patent number: 9809525
    Abstract: A method of making terephthalic acid via reductive coupling of two molecules of propiolic acid or propiolic acid derivatives is presented. The reductive coupling can be catalyzed by compounds comprising metals, and propiolic acid or propiolic acid derivatives can be produced from acetylene and carbon dioxide. At least 4 of the 8 carbons in the terephthalic acid are non-fossil-derived.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: November 7, 2017
    Assignee: The Procter & Gamble Company
    Inventors: Jeffrey Charles Hayes, Hairong Guan, Dimitris Ioannis Collias
  • Production Of Terephthalic Acid Via Reductive Coupling Of Propiolic Acid Or Propiolic Acid Derivatives
    Publication number: 20160264506
    Abstract: A method of making terephthalic acid via reductive coupling of two molecules of propiolic acid or propiolic acid derivatives is presented. The reductive coupling can be catalyzed by compounds comprising metals, and propiolic acid or propiolic acid derivatives can be produced from acetylene and carbon dioxide. At least 4 of the 8 carbons in the terephthalic acid are non-fossil-derived.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 15, 2016
    Inventors: Jeffrey Charles Hayes, Hairong Guan, Dimitris Ioannis Collias
  • Homogeneous Hydrogenation of Esters Employing a Complex of Iron as Catalyst
    Publication number: 20150274621
    Abstract: The homogeneous hydrogenation of organic carbonyls, especially esters, under relatively mild conditions using iron hydrido-borohydride catalyst complexes having amino-phosphine pincer ligands. The catalyst and process are well-suited for catalyzing the hydrogenation of a wide variety of organic carbonyls, such as hydrogenation of fatty acid esters to alcohols. In particular embodiments, the process can be carried out in the absence of solvent.
    Type: Application
    Filed: March 23, 2015
    Publication date: October 1, 2015
    Inventors: Neil Thomas FAIRWEATHER, Michael Steven GIBSON, Hairong GUAN, Sumit CHAKRABORTY, Huiguang DAI, Papri BHATTACHARYA
  • Ligand iron catalysts for selective hydrogenation
    Patent number: 7834224
    Abstract: Disclosed are iron ligand catalysts for selective hydrogenation of aldehydes, ketones and imines. A catalyst such as dicarbonyl iron hydride hydroxycyclopentadiene) complex uses the OH on the five member ring and hydrogen linked to the iron to facilitate hydrogenation reactions, particularly in the presence of hydrogen gas.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: November 16, 2010
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Charles P. Casey, Hairong Guan
  • Ligand Iron Catalysts For Selective Hydrogenation
    Publication number: 20100286401
    Abstract: Disclosed are iron ligand catalysts for selective hydrogenation of aldehydes, ketones and imines. A catalyst such as dicarbonyl iron hydride hydroxycyclopentadiene) complex uses the OH on the five member ring and hydrogen linked to the iron to facilitate hydrogenation reactions, particularly in the presence of hydrogen gas.
    Type: Application
    Filed: November 20, 2007
    Publication date: November 11, 2010
    Inventors: Charles P. Casey, Hairong Guan