Patents by Inventor Xiaoyan Tu

Xiaoyan Tu 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: 9138967
    Abstract: Wood laminates may comprise a plurality of wood substrates and an adhesive disposed between at least a portion of at least two of the wood substrates, the adhesive comprising a substituted cellulose ester that comprises a cellulose polymer backbone having an organic ester substituent and an inorganic ester substituent that comprises an inorganic, nonmetal atom selected from the group consisting of sulfur, phosphorus, boron, and chlorine. In some instances the adhesive may be substantially formaldehyde-free.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: September 22, 2015
    Assignee: Celanese Acetate LLC
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20150225567
    Abstract: A polymer composition that comprises a polyarylene sulfide, inorganic fibers, impact modifier, and a functionalized coupling system is provided. The functionalized coupling system includes a disulfide compound and an organosilane compound. The weight ratio of organosilane compounds to disulfide compounds is from about 0.1 to about 10.
    Type: Application
    Filed: October 29, 2014
    Publication date: August 13, 2015
    Inventors: Kent R. Miller, Xiaoyan Tu, Rong Luo, Xinyu Zhao
  • Publication number: 20150225547
    Abstract: A polymer composition containing a polyarylene sulfide, a disulfide compound, and inorganic fibers is provided. The polymer composition has an aspect ratio of from about 1.5 to about 10, wherein the aspect ratio is defined as the cross-sectional width of the fibers divided by the cross-sectional thickness of the fibers.
    Type: Application
    Filed: October 29, 2014
    Publication date: August 13, 2015
    Inventors: Xiaoyan Tu, Rong Luo, Ke Feng, Xinyu Zhao
  • Patent number: 9090045
    Abstract: Engineered wood may be produced with substituted cellulose ester adhesives. For example, an engineered wood may comprise a plurality of wood substrates that independently comprise a lignin-containing material (e.g., wood dust, wood particles, wood chips, and the like), the plurality of wood substrates being adhered together with an adhesive that comprises a substituted cellulose ester that comprises a cellulose polymer backbone having an organic ester substituent and an inorganic ester substituent that comprises an inorganic, nonmetal atom selected from the group consisting of sulfur, phosphorus, boron, and chlorine.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: July 28, 2015
    Assignee: Celanese Acetate LLC
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20150203723
    Abstract: A substituted cellulose ester having a cellulose backbone with an organic ester substituent and an inorganic ester substituent derived from the inorganic ester oxoacid catalyst may be utilized in adhesive compositions and articles produced therewith. Producing a substituted cellulose ester may, in some embodiments, involve providing a cellulose ester mixture that comprises a cellulose ester and a solvent; and hydrolyzing a mixture that comprises the cellulose ester mixture, water, and an inorganic ester oxoacid catalyst so as to yield a substituted cellulose ester having a cellulose backbone with an organic ester substituent and an inorganic ester substituent derived from the inorganic ester oxoacid catalyst.
    Type: Application
    Filed: September 24, 2012
    Publication date: July 23, 2015
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20150184343
    Abstract: A method for treating a cellulosic material comprises extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulose-containing material. The extractant comprises an amine oxide and a non-solvent. The cellulosic product retains the cellulosic fiber morphology.
    Type: Application
    Filed: March 11, 2015
    Publication date: July 2, 2015
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E. Kizer
  • Publication number: 20150184337
    Abstract: A method for treating a cellulosic material comprises extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulose-containing material. The extractant comprises an ionic liquid and a non-solvent. The cellulosic product retains the cellulosic fiber morphology.
    Type: Application
    Filed: March 11, 2015
    Publication date: July 2, 2015
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E. Kizer
  • Patent number: 9050585
    Abstract: A hydrogenation catalyst and process using the catalyst for converting a mixture comprising acetic acid and ethyl acetate to ethanol at a first temperature, and the catalyst desorbs ethyl acetate, in the absence of hydrogen, at a second temperature that is greater than the first temperature. The catalyst has a suitable chemisorption of ethyl acetate at the first temperature in the absence of hydrogen. In one embodiment, the first temperature ranges from 125° C. to 350° C. and the second temperature ranges from 300° C. to 600° C. The catalyst comprises one or more active metals or oxide thereof on a support that comprises tungsten or an oxide thereof. The one or more active metals are selected from the group consisting of cobalt, copper, gold, iron, nickel, palladium, platinum, iridium, osmium, rhenium, rhodium, ruthenium, tin, zinc, lanthanum, cerium, manganese, chromium, vanadium, and molybdenum.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: June 9, 2015
    Assignee: Celanese International Corporation
    Inventors: Zhenhua Zhou, Heiko Weiner, Dheeraj Kumar, Xiaoyan Tu, Victor J. Johnston, Radmila Jevtic
  • Patent number: 8986501
    Abstract: A method for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises an amine oxide and a non-solvent. The cellulosic product retains the cellulosic fiber morphology.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 24, 2015
    Assignee: Celanese International Corporation
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E Kizer
  • Patent number: 8980050
    Abstract: A method for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises an amine oxide and a non-solvent. The cellulosic product retains the cellulosic fiber morphology.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 17, 2015
    Assignee: Celanese International Corporation
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E Kizer
  • Publication number: 20150072093
    Abstract: Thermoplastic compositions are described that exhibit resistance to hydrocarbon absorption. Methods for forming the thermoplastic compositions are also described. Formation methods include combining a polyarylene sulfide with a first impact modifier and a second impact modifier such that the impact modifiers are dispersed throughout the polyarylene sulfide. A crosslinking agent can be combined with the other components of the composition following dispersal of the additives throughout the composition to dynamically crosslink at least one of the first and second impact modifiers.
    Type: Application
    Filed: August 25, 2014
    Publication date: March 12, 2015
    Inventors: Bin Zhang, Rong Luo, Xiaoyan Tu
  • Publication number: 20150064437
    Abstract: Injection molded parts with a small dimension that exhibit high heat resistance are described. Thermoplastic compositions that can be utilized to form the injection molded parts are described. The thermoplastic composition includes a polyarylene sulfide and a crosslinked impact modifier. The thermoplastic composition can also include siloxane polymers, thermoplastic elastomers, or other additives that can further improve the characteristics of the injection molded parts.
    Type: Application
    Filed: August 25, 2014
    Publication date: March 5, 2015
    Inventors: Rong Luo, Kent Miller, Xinyu Zhao, Xiaoyan Tu
  • Publication number: 20150025281
    Abstract: The present invention relates to catalysts, to processes for making catalysts and to chemical processes employing such catalysts. The catalysts are preferably used for converting acetic acid to ethanol. The catalyst comprises a precious metal and one or more active metals on a modified support. The modified support may comprise cobalt tungstate.
    Type: Application
    Filed: September 16, 2014
    Publication date: January 22, 2015
    Inventors: Zhenhua Zhou, Victor J. Johnston, Dheeraj Kumar, Xiaoyan Tu, Heiko Weiner, Radmila Wollrab
  • Publication number: 20150024927
    Abstract: A hydrogenation catalyst and process using the catalyst for converting a mixture comprising acetic acid and ethyl acetate to ethanol at a first temperature, and the catalyst desorbs ethyl acetate, in the absence of hydrogen, at a second temperature that is greater than the first temperature. The catalyst has a suitable chemisorption of ethyl acetate at the first temperature in the absence of hydrogen. In one embodiment, the first temperature ranges from 125° C. to 350° C. and the second temperature ranges from 300° C. to 600° C. The catalyst comprises one or more active metals or oxide thereof on a support that comprises tungsten or an oxide thereof. The one or more active metals are selected from the group consisting of cobalt, copper, gold, iron, nickel, palladium, platinum, iridium, osmium, rhenium, rhodium, ruthenium, tin, zinc, lanthanum, cerium, manganese, chromium, vanadium, and molybdenum.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 22, 2015
    Inventors: Zhenhua Zhou, Heiko Weiner, Dheeraj Kumar, Xiaoyan Tu, Victor J. Johnston, Radmila Wollrab
  • Publication number: 20140326421
    Abstract: A process for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therefrom and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises a cellulose solvent and a co-solvent. The cellulosic product advantageously retains its cellulosic fiber morphology. The processes involve separating and recovering the hemicellulose and separating and recycling various process streams employed in the process.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 6, 2014
    Applicant: Celanese International Corporation
    Inventors: Denis G. Fallon, Thomas S. Garrett, Lawton Kizer, Bin Li, Rongfu Li, Jay Mehta, Tianshu Pan, Xiaoyan Tu, Leslie Allen, Dinesh Arora, Prabuddha Bansal, Michael T. Combs
  • Patent number: 8865609
    Abstract: The present invention relates to catalysts, to processes for making catalysts and to chemical processes employing such catalysts. The catalysts are preferably used for converting acetic acid to ethanol. The catalyst comprises a precious metal and one or more active metals on a modified support. The modified support may comprise cobalt tungstate.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: October 21, 2014
    Assignee: Celanese International Corporation
    Inventors: Zhenhua Zhou, Victor Johnston, Dheeraj Kumar, Xiaoyan Tu, Heiko Weiner, Radmila Wollrab
  • Publication number: 20140242326
    Abstract: Wood laminates may comprise a plurality of wood substrates and an adhesive disposed between at least a portion of at least two of the wood substrates, the adhesive comprising a substituted cellulose ester that comprises a cellulose polymer backbone having an organic ester substituent and an inorganic ester substituent that comprises an inorganic, nonmetal atom selected from the group consisting of sulfur, phosphorus, boron, and chlorine. In some instances the adhesive may be substantially formaldehyde-free.
    Type: Application
    Filed: September 24, 2012
    Publication date: August 28, 2014
    Applicant: Celanese Acetate LLC
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20140193653
    Abstract: Fibrous substrates may be adhered to other substrates utilizing substituted cellulose ester adhesives that comprises a cellulose polymer backbone having an organic ester substituent and an inorganic ester substituent that comprises an inorganic, nonmetal atom selected from the group consisting of sulfur, phosphorus, boron, and chlorine.
    Type: Application
    Filed: September 24, 2012
    Publication date: July 10, 2014
    Applicant: Celanese Acetate LLC
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20140087122
    Abstract: Engineered wood may be produced with substituted cellulose ester adhesives. For example, an engineered wood may comprise a plurality of wood substrates that independently comprise a lignin-containing material (e.g., wood dust, wood particles, wood chips, and the like), the plurality of wood substrates being adhered together with an adhesive that comprises a substituted cellulose ester that comprises a cellulose polymer backbone having an organic ester substituent and an inorganic ester substituent that comprises an inorganic, nonmetal atom selected from the group consisting of sulfur, phosphorus, boron, and chlorine.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 27, 2014
    Applicant: Celanese Acetate LLC
    Inventors: Michael Combs, Thomas Garrett, Chad Prunesti, Martin Jakob, Yi (Julie) Li, Xiaoyan Tu
  • Publication number: 20140048221
    Abstract: A method for treating a cellulosic material comprises extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulose-containing material. The extractant comprises an ionic liquid and a non-solvent comprising acetic acid. The cellulosic product retains the cellulosic fiber morphology.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 20, 2014
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E. Kizer