Patents by Inventor Changkun Liu

Changkun 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).

  • Patent number: 7687601
    Abstract: Conductive polymers are purified using a solid scavenger. The solid scavengers include metal-scavenging functional groups linked to the surface of a particle support material. To improve the functionalization of the support material, the support materials are first treated with sulfuric acid or nitric acid before attaching the molecules containing the metal-scavenging functional groups. The solid scavengers used in the purification methods are more efficient at removing impurities in conductive polymers than existing scavengers.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: March 30, 2010
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20100043529
    Abstract: A new type of highly efficient and self-cleaning humidity sensor based on Mg2+/Na+-doped TiO2 nanofiber mats is provided. Examples show the response and recovery characteristic curves for ten circles with the RH changing from 11% to 95%. The nanofibers are manufactured by mixing together a metal salt comprising titanium, a magnesium compound, a sodium compound, and a high molecular weight material to form a mixture, electrospinning the mixture to form composite nanofibers, and calcining the composite nanofibers to yield a TiO2 nanofiber material doped with magnesium and sodium.
    Type: Application
    Filed: August 20, 2009
    Publication date: February 25, 2010
    Inventors: Ce Wang, Hongnan Zhang, Zhenyu Li, Wei Zheng, Wei Wang, Changkun Liu, Bing Zhou
  • Patent number: 7569508
    Abstract: Reforming nanocatalysts are formed using a dispersing agent to increase the activity, selectivity and longevity of the catalyst when used in a reforming process. The nanocatalyst particles are formed using a dispersing agent having at least one functional group selected from the group of a hydroxyl, a carboxyl, a carbonyl, an amide, an amine, a thiol, a sulfonic acid, sulfonyl halide, an acyl halide, an organometallic complex, and combinations of these. The dispersing agent is particularly useful for forming multicomponent catalysts comprising an alloy, combination, mixture, decoration, or interspersion of platinum and one or more of tin, rhenium or iridium. The formation of the nanoparticles may include a heat treating process performed in an inert or oxidative environment to maintain the catalyst atoms in a non-zero oxidation state to thereby maintain a stronger bond between the dispersing agent and the catalyst atoms.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: August 4, 2009
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Bing Zhou, Horacio TreviƱo, Zhihua Wu, Zhenhua Zhou, Changkun Liu
  • Patent number: 7557064
    Abstract: Organic ligands that contain at least one aryl group are immobilized on a solid support. The organic ligands are of the type used to form a catalyst complex suitable for carrying out a catalytic reaction, preferably an asymmetric reaction. To immobilize the organic ligands, a tethering group is bonded to the ligand using, for example, a Friedel-Crafts acylation or alkylation reaction. The immobilization of the organic ligand can be carried out using a single reaction with the organic ligand.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: July 7, 2009
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Bing Zhou, Changkun Liu
  • Patent number: 7547757
    Abstract: Aryl-aryl coupled polymers are manufactured using a water-soluble noble metal catalyst. The hydrophilicity of the catalyst facilitates the separation of the catalyst from the polymer product. The method can be generally carried out by preparing a reaction medium comprising an aqueous phase and an organic phase. A water-soluble noble metal catalyst is dispersed in the aqueous phase. A base is also dispersed in the aqueous phase. An aryl-aryl coupled polymer is formed in the reaction medium by (i) adding at least one polymerizable monomer to the reaction mixture; and (ii) mixing the aqueous phase with the organic phase to cause polymerization of the monomer through an aryl-aryl coupling reaction. The polymer has a greater solubility in the organic phase than the aqueous phase. Allowing the organic phase to separate from the aqueous phase separates the water soluble catalyst from the polymer. The reaction can be used to manufacture high molecular weight polymers (e.g.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: June 16, 2009
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20090149316
    Abstract: Organic ligands that contain at least one aryl group are immobilized on a solid support. The organic ligands are of the type used to form a catalyst complex suitable for carrying out a catalytic reaction, preferably an asymmetric reaction. To immobilize the organic ligands, a tethering group is bonded to the ligand using, for exarnple, a Friedel-Crafts acylation or alkylation reaction. The immobilization of the organic ligand can be carried out using a single reaction with the organic ligand.
    Type: Application
    Filed: February 20, 2009
    Publication date: June 11, 2009
    Applicant: HEADWATERS TECHNOLOGY INNOVATION, LLC
    Inventors: Bing Zhou, Changkun Liu
  • Publication number: 20090048467
    Abstract: Organic ligands that contain at least one aryl group are immobilized on a solid support. The organic ligands are of the type used to form a catalyst complex suitable for carrying out a catalytic reaction, preferably an asymmetric reaction. To immobilize the organic ligands, a tethering group is bonded to the ligand using, for example, a Friedel-Crafts acylation or alkylation reaction. The immobilization of the organic ligand can be carried out using a single reaction with the organic ligand.
    Type: Application
    Filed: August 13, 2007
    Publication date: February 19, 2009
    Applicant: Headwaters Technology Innovation, LLC
    Inventors: Bing Zhou, Changkun Liu
  • Patent number: 7449423
    Abstract: A catalyst manufacturing process includes heat treating an intermediate catalyst composition that includes catalyst nanoparticles having catalyst atoms in a non-zero oxidation state bonded to a dispersing/anchoring agent. The catalyst nanoparticles are formed using a dispersing agent having at least one functional group selected from the group of a hydroxyl, a carboxyl, a carbonyl, an amide, an amine, a thiol, a sulfonic acid, sulfonyl halide, an acyl halide, an organometallic complex, and combinations of these. The dispersing agent can be used to form single- or multicomponent supported nanocatalysts. The dispersing agent also acts as an anchoring agent to firmly bond the nanocatalyst to a support. Performing the heat treating process in an inert or oxidative environment to maintain the catalyst atoms in a non-zero oxidation helps maintains a stronger bonding interaction between the dispersing agent and the catalyst atoms.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: November 11, 2008
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Bing Zhou, Horacio Trevino, Zhihua Wu, Zhenhua Zhou, Changkun Liu
  • Patent number: 7425520
    Abstract: A supported catalyst for hydrogenating nitro groups of halonitro compounds manufactured from a support, a solvent, and one or more types of organometallic complexes. The organometallic complexes have the formula: wherein, R1-R6 are independently an R, OR, OC(?O)R, halogen, or combination thereof, where R stands for an alkyl or aryl group; Y1-Y4 are independently an O, S, N, or P atom; and M is a metal atom. The supported catalysts show much higher selectivity and activity when used to hydrogenate nitro groups on halonitro aromatic compounds than catalyst currently being used for such hydrogenation.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: September 16, 2008
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20080081877
    Abstract: Conductive polymers are purified using a solid scavenger. The solid scavengers include metal-scavenging functional groups linked to the surface of a particle support material. To improve the functionalization of the support material, the support materials are first treated with sulfuric acid or nitric acid before attaching the molecules containing the metal-scavenging functional groups. The solid scavengers used in the purification methods are more efficient at removing impurities in conductive polymers than existing scavengers.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 3, 2008
    Applicant: Headwaters Nanokinetix, Inc.
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20080033193
    Abstract: A supported catalyst for hydrogenating nitro groups of halonitro compounds manufactured from a support, a solvent, and one or more types of organometallic complexes. The organometallic complexes have the formula: wherein, R1-R6 are independently an R, OR, OC(?O)R, halogen, or combination thereof, where R stands for an alkyl or aryl group; Y1-Y4 are independently an O, S, N, or P atom; and M is a metal atom. The supported catalysts show much higher selectivity and activity when used to hydrogenate nitro groups on halonitro aromatic compounds than catalyst currently being used for such hydrogenation.
    Type: Application
    Filed: June 18, 2007
    Publication date: February 7, 2008
    Applicant: Headwaters Technology Innovation, LLC
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20080033146
    Abstract: Aryl-aryl coupled polymers are manufactured using a water-soluble noble metal catalyst. The hydrophilicity of the catalyst facilitates the separation of the catalyst from the polymer product. The method can be generally carried out by preparing a reaction medium comprising an aqueous phase and an organic phase. A water-soluble noble metal catalyst is dispersed in the aqueous phase. A base is also dispersed in the aqueous phase. An aryl-aryl coupled polymer is formed in the reaction medium by (i) adding at least one polymerizable monomer to the reaction mixture; and (ii) mixing the aqueous phase with the organic phase to cause polymerization of the monomer through an aryl-aryl coupling reaction. The polymer has a greater solubility in the organic phase than the aqueous phase. Allowing the organic phase to separate from the aqueous phase separates the water soluble catalyst from the polymer. The reaction can be used to manufacture high molecular weight polymers (e.g.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 7, 2008
    Applicant: Headwaters Nanokinetix, Inc.
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20070265162
    Abstract: Methods for manufacturing carbon nanostructures include: 1) forming a plurality of catalytic templating particles using a plurality of dispersing agent molecules; 2) forming an intermediate carbon nanostructure by polymerizing a carbon precursor in the presence of the plurality of templating nanoparticles; 3) carbonizing the intermediate carbon nanostructure to form a composite nanostructure; and 4) removing the templating nanoparticles from the composite nanostructure to yield the carbon nanostructures. The carbon nanostructures are well-suited for use as a catalyst support. The carbon nanostructures exhibit high surface area, high porosity, and high graphitization. Carbon nanostructures according to the invention can be used as a substitute for more expensive and likely more fragile carbon nanotubes.
    Type: Application
    Filed: October 5, 2006
    Publication date: November 15, 2007
    Applicant: Headwaters Nanokinetix, Inc.
    Inventors: Cheng Zhang, Martin Fransson, Changkun Liu, Bing Zhou
  • Patent number: 7288500
    Abstract: A supported catalyst for hydrogenating nitro groups of halonitro compounds manufactured from a support, a solvent, and a plurality of organometallic complexes. The organometallic complexes have the formula: wherein, R1-R6, are independently an R, OR, OC(?O)R, halogen, or combination thereof, where R stands for an alkyl or aryl group; Y1-Y4 are independently an O, S, N, or P atom; and M is a metal atom. The supported catalysts show much higher selectivity and activity when used to hydrogenate nitro groups on halonitro aromatic compounds than catalyst currently being used for such hydrogenation.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: October 30, 2007
    Assignee: Headwaters Technology Innovation, LLC
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20070167562
    Abstract: Inorganic oxide substrates are functionalized with silicon-free organic functionalizing agents. The organic functionalizing agent has a bonding functional group for bonding to the substrate and a functionalizing moiety that is not bonded to the substrate for imparting a desired functionality to the substrate. The functionalized inorganic oxide substrates are manufactured by selecting a functionalizing agent and reaction conditions that allows the bonding functional group to bond to the inorganic material while leaving the functionalizing moiety available for providing the desired functionality. The functionalized inorganic oxides can be used as filler materials in polymers or to manufacture a supported nanoparticle catalyst.
    Type: Application
    Filed: January 17, 2006
    Publication date: July 19, 2007
    Inventors: Bing Zhou, Changkun Liu, Clementine Reyes
  • Publication number: 20070082255
    Abstract: The fuel cells include electrode membrane assemblies having a nanoparticle catalyst supported on carbon nanorings. The carbon nanorings are formed from one or more carbon layers that form a wall that defines a generally annular nanostructure having a hole. The length of the nanoring is less than or about equal to the outer diameter thereof. The nanorings exhibit high surface area, high porosity, high graphitization, and/or facilitate mass transfer and electron transfer in fuel cell reactions.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Inventors: Gongquan Sun, Shuihua Tang, Shiguo Sun, Qin Xin, Changkun Liu, Bing Zhou
  • Publication number: 20070049772
    Abstract: A supported catalyst for hydrogenating nitro groups of halonitro compounds manufactured from a support, a solvent, and a plurality of organometallic complexes. The organometallic complexes have the formula: wherein, R1-R6, are independently an R, OR, OC(?O)R, halogen, or combination thereof, where R stands for an alkyl or aryl group; Y1-Y4 are independently an O, S, N, or P atom; and M is a metal atom. The supported catalysts show much higher selectivity and activity when used to hydrogenate nitro groups on halonitro aromatic compounds than catalyst currently being used for such hydrogenation.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 1, 2007
    Inventors: Changkun Liu, Bing Zhou
  • Publication number: 20060160695
    Abstract: A catalyst manufacturing process includes heat treating an intermediate catalyst composition that includes catalyst nanoparticles having catalyst atoms in a non-zero oxidation state bonded to a dispersing/anchoring agent. The catalyst nanoparticles are formed using a dispersing agent having at least one functional group selected from the group of a hydroxyl, a carboxyl, a carbonyl, an amide, an amine, a thiol, a sulfonic acid, sulfonyl halide, an acyl halide, an organometallic complex, and combinations of these. The dispersing agent can be used to form single- or multicomponent supported nanocatalysts. The dispersing agent also acts as an anchoring agent to firmly bond the nanocatalyst to a support. Performing the heat treating process in an inert or oxidative environment to maintain the catalyst atoms in a non-zero oxidation helps maintains a stronger bonding interaction between the dispersing agent and the catalyst atoms.
    Type: Application
    Filed: April 7, 2005
    Publication date: July 20, 2006
    Inventors: Bing Zhou, Horacio Trevino, Zhihua Wu, Zhenhua Zhou, Changkun Liu
  • Publication number: 20060102521
    Abstract: Reforming nanocatalysts are formed using a dispersing agent to increase the activity, selectivity and longevity of the catalyst when used in a reforming process. The nanocatalyst particles are formed using a dispersing agent having at least one functional group selected from the group of a hydroxyl, a carboxyl, a carbonyl, an amide, an amine, a thiol, a sulfonic acid, sulfonyl halide, an acyl halide, an organometallic complex, and combinations of these. The dispersing agent is particularly useful for forming multicomponent catalysts comprising an alloy, combination, mixture, decoration, or interspersion of platinum and one or more of tin, rhenium or iridium. The formation of the nanoparticles may include a heat treating process performed in an inert or oxidative environment to maintain the catalyst atoms in a non-zero oxidation state to thereby maintain a stronger bond between the dispersing agent and the catalyst atoms.
    Type: Application
    Filed: April 7, 2005
    Publication date: May 18, 2006
    Inventors: Bing Zhou, Horacio Trevino, Zhihua Wu, Zhenhua Zhou, Changkun Liu