Patents by Inventor Yun-Shan Liu

Yun-Shan Liu 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: 20210340308
    Abstract: A polyurethane insulation foam composition is disclosed herein. The polyurethane insulation foam comprises: (i) an aromatic isocyanate compound; (ii) an isocyanate reactive compound; (iii) water; (iv) a tertiary amine compound; (v) a hydrophilic carboxylic acid compound; (vi) a halogenated olefin compound; (vii) a stabilizing compound, and (vii) optionally, other additives.
    Type: Application
    Filed: August 21, 2019
    Publication date: November 4, 2021
    Inventors: Yangjun CAI, Lifeng WU, Sachchida SINGH, Yun-Shan LIU
  • Patent number: 8513468
    Abstract: A process for removing degradation acids from a catalyst solution comprising a phosphorus-containing hydroformylation ligand used in a hydroformylation reaction is described. The process involves using a supported epoxy compound. Also described is a hydroformylation process that includes the degradation acids removal process.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: August 20, 2013
    Assignee: Eastman Chemical Company
    Inventor: Yun-Shan Liu
  • Publication number: 20120172630
    Abstract: A process for removing degradation acids from a catalyst solution comprising a phosphorus-containing hydroformylation ligand used in a hydroformylation reaction is described. The process involves using a supported epoxy compound. Also described is a hydroformylation process that includes the degradation acids removal process.
    Type: Application
    Filed: December 30, 2010
    Publication date: July 5, 2012
    Applicant: Eastman Chemical Company
    Inventor: Yun-Shan Liu
  • Patent number: 7928267
    Abstract: Novel trivalent organophosphite ligands having the structure of general formula (I): wherein R is an alkyl or aryl group containing 1 to 30 carbon atoms; Ar1 and Ar2 are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these ligands with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: April 19, 2011
    Assignee: Eastman Chemical Company
    Inventors: Thomas Allen Puckette, Yun-Shan Liu
  • Patent number: 7872156
    Abstract: Novel fluorophosphite compounds having the structure of general formula (I): where Ar1 and Ar2 are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these compounds with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: January 18, 2011
    Assignee: Eastman Chemical Company
    Inventors: Yun-Shan Liu, Jody Lee Rodgers
  • Patent number: 7872157
    Abstract: Novel trivalent organophosphonite ligands having the structure of general formula (I): wherein R is an alkyl or aryl group containing 1 to 30 carbon atoms; Ar1 and Ar2 are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these ligands with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: January 18, 2011
    Assignee: Eastman Chemical Company
    Inventors: Yun-Shan Liu, Jody Lee Rodgers
  • Patent number: 7586010
    Abstract: Disclosed are catalyst solutions for preparing aldehydes with variable normal- to iso-aldehyde ratios comprising one or more phosphonite ligands, rhodium, and a hydroformylation solvent. Also disclosed is a process for preparing aldehydes with variable normal- to iso-aldehyde ratios comprising contacting an olefin, hydrogen, and carbon monoxide with one or more phosphonite ligands, rhodium, and a hydroformylation solvent. The phosphonite-based catalyst solutions provide the ability to manipulate the normal- to iso-aldehyde ratio by varying one or more process variables including carbon monoxide partial pressure, temperature, and gram moles ligand to gram atoms rhodium.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: September 8, 2009
    Assignee: Eastman Chemical Company
    Inventors: Yun-Shan Liu, Thomas Allen Puckette
  • Publication number: 20090171122
    Abstract: Novel trivalent organophosphonite ligands having the structure of general formula (I): wherein R is an alkyl or aryl group containing 1 to 30 carbon atoms; Ar1 and Ar2 are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these ligands with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.
    Type: Application
    Filed: December 8, 2008
    Publication date: July 2, 2009
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Yun-Shan Liu, Jody Lee Rodgers
  • Publication number: 20090171121
    Abstract: Novel fluorophosphite compounds having the structure of general formula (I): where Ar1 and Ar2 are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these compounds with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.
    Type: Application
    Filed: December 8, 2008
    Publication date: July 2, 2009
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Yun-Shan Liu, Jody Lee Rodgers
  • Publication number: 20080154067
    Abstract: Disclosed are catalyst solutions for preparing aldehydes with variable normal- to iso-aldehyde ratios comprising one or more phosphonite ligands, rhodium, and a hydroformylation solvent. Also disclosed is a process for preparing aldehydes with variable normal- to iso-aldehyde ratios comprising contacting an olefin, hydrogen, and carbon monoxide with one or more phosphonite ligands, rhodium, and a hydroformylation solvent. The phosphonite-based catalyst solutions provide the ability to manipulate the normal- to iso-aldehyde ratio by varying one or more process variables including carbon monoxide partial pressure, temperature, and gram moles ligand to gram atoms rhodium.
    Type: Application
    Filed: November 16, 2007
    Publication date: June 26, 2008
    Applicant: Eastman Chemical Company
    Inventors: Yun-Shan Liu, Thomas Allen Puckette
  • Patent number: 6429272
    Abstract: There are disclosed novel homopolymers of 5-aryl-2-norbornene, and novel interpolymers of 5-aryl-2-norbornene with at least one other cyclic or acyclic alkene, and hydrogenated hydrocarbon resins resulting from hydrogenation of the homopolymers and interpolymers. The products are particularly useful as tackifiers. Also disclosed is a novel process for preparing the homopolymers and interpolymers of the 5-aryl-2-norbornene, wherein there is used as the polymerization catalyst, a Friedel-Crafts catalyst, such as aluminum chloride or boron trifluoride.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: August 6, 2002
    Assignee: Eastman Chemical Company
    Inventor: Yun-Shan Liu