Patents by Inventor Zheng DANG

Zheng DANG 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: 20240318383
    Abstract: The present invention provides a softener concentrate and a softener emulsion comprising imidazoline-based surfactant, lanolin-based softener, phospholipids and surfactant blend. The present invention further provides a process for producing a softener emulsion and controlling the viscosity of a softener emulsion. The present invention also provides a method for producing paper, tissue or paperboard, in which method a softener according to the present invention is used.
    Type: Application
    Filed: December 27, 2021
    Publication date: September 26, 2024
    Inventors: Zheng DANG, Junhua CHEN, Clayton CAMPBELL, Yong ZOU, Yuping LUO
  • Patent number: 11834792
    Abstract: Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: December 5, 2023
    Assignee: Kemira OYJ
    Inventors: Clayton Campbell, Junhua Chen, Zheng Dang
  • Patent number: 11535985
    Abstract: A method for manufacture of paper or board, in which method an inverted solution of cationic polymer is added to the fiber suspension for providing retention enhancement without over-flocculating fiber stock and destruction sheet formation and/or improving drainage and enhancing or at least maintaining strength of paper or board, An inverted solution has a bulk viscosity of 50-150 mPas at 0.2 weight-% cationic polymer concentration and inverted solution comprises cationic polymer obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 15-50 mol-% cationic monomers, an optionally at most 50 ppm of a crosslinking agent, and a chain transfer agent, and the obtained reverse phase emulsion of cationic polymer is inverted into an aqueous solution.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: December 27, 2022
    Assignee: Kemira Oyj
    Inventors: Yuping Luo, Jennifer Riser, Zheng Dang, Junhua Chen, Ronald Robinson, Andrew Pencek, Barbara Lukasik
  • Patent number: 11453979
    Abstract: Embodiments of the present invention relate to a method of making a paper comprising the steps of: a) providing a cationic wet strength resin comprising a polyamidoamine epihalohydrin, a condensation copolymer of epihalohydrin and amine, or combination thereof; b) providing an anionic polymer; c) co-mixing the cationic wet strength resin and the anionic polymer to provide a composition comprising polyelectrolyte complexes; d) providing an aqueous pulp slurry, draining the aqueous pulp slurry on a screen to form a wet fiber web, and drying the wet fiber web to obtain the paper, wherein said co-mixed composition is introduced to the aqueous pulp slurry or on the formed wet fiber web. Embodiments of the present invention further relates to a paper wet strength composition, its use in paper making and a paper obtainable therefrom.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: September 27, 2022
    Assignee: KEMIRA OYJ
    Inventors: Yuping Luo, Junhua Chen, Zheng Dang
  • Publication number: 20220195672
    Abstract: Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.
    Type: Application
    Filed: April 1, 2020
    Publication date: June 23, 2022
    Inventors: Clayton CAMPBELL, Junhua CHEN, Zheng DANG
  • Patent number: 11208766
    Abstract: A surface treatment composition is disclosed including anionic polyacrylamide, which has a weight average molecular weight, MW, in the range of 100 000-2 000 000 g/mol, and free glyoxal. Further disclosed is a use of the surface treatment composition, a method for producing paper, board or the like and a paper product.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: December 28, 2021
    Assignee: Kemira Oyj
    Inventors: Yuping Luo, Junhua Chen, Zheng Dang, Jennifer Riser
  • Publication number: 20210189659
    Abstract: Embodiments of the present invention relate to a method of making a paper comprising the steps of: a) providing a cationic wet strength resin comprising a polyamidoamine epihalohydrin, a condensation copolymer of epihalohydrin and amine, or combination thereof; b) providing an anionic polymer; c) co-mixing the cationic wet strength resin and the anionic polymer to provide a composition comprising polyelectrolyte complexes; d) providing an aqueous pulp slurry, draining the aqueous pulp slurry on a screen to form a wet fiber web, and drying the wet fiber web to obtain the paper, wherein said co-mixed composition is introduced to the aqueous pulp slurry or on the formed wet fiber web. Embodiments of the present invention further relates to a paper wet strength composition, its use in paper making and a paper obtainable therefrom.
    Type: Application
    Filed: May 14, 2018
    Publication date: June 24, 2021
    Inventors: Yuping LUO, Junhua CHEN, Zheng DANG
  • Publication number: 20210002827
    Abstract: A method for manufacture of paper or board, in which method an inverted solution of cationic polymer is added to the fiber suspension for providing retention enhancement without over-flocculating fiber stock and destruction sheet formation and/or improving drainage and enhancing or at least maintaining strength of paper or board, An inverted solution has a bulk viscosity of 50-150 mPas at 0.2 weight-% cationic polymer concentration and inverted solution comprises cationic polymer obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 15-50 mol-% cationic monomers, an optionally at most 50 ppm of a crosslinking agent, and a chain transfer agent, and the obtained reverse phase emulsion of cationic polymer is inverted into an aqueous solution.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Applicant: Kemira Oyj
    Inventors: Yuping Luo, Jennifer Riser, Zheng Dang, Junhua Chen, Ronald Robinson, Andrew Pencek, Barbara Lukasik
  • Publication number: 20200232165
    Abstract: A surface treatment composition is disclosed including anionic polyacrylamide, which has a weight average molecular weight, MW, in the range of 100 000-2 000 000 g/mol, and free glyoxal. Further disclosed is a use of the surface treatment composition, a method for producing paper, board or the like and a paper product.
    Type: Application
    Filed: September 26, 2018
    Publication date: July 23, 2020
    Inventors: Yuping LUO, Junhua CHEN, Zheng DANG, Jennifer RISER
  • Patent number: 9992321
    Abstract: A mobile terminal with a built-in voice message searching function includes: a voice recording module configured to record a voice searching signal from a user and to send the voice searching signal to the pre-processing module for pre-processing, a pre-processing module configured to pre-process the voice searching signal, and to send the pre-processed signal to the matching module for signal matching, a matching module configured to extract a characteristic parameter of the pre-processed signal, to calculate a similarity of the extracted characteristic parameter with a characteristic parameter of a stored voice message, and to send the voice message with a similarity higher than or equal to a threshold to the result outputting module, and a result outputting module configured to display the voice message with the similarity higher than or equal to the threshold on a screen of the mobile terminal.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: June 5, 2018
    Assignee: ZTE CORPORATION
    Inventor: Zheng Dang
  • Patent number: 9435002
    Abstract: A continuous process for producing hemicellulose sugars from a biomass extraction liquor is provided. A system is configured for continuously producing hemicellulose sugars and/or hemicellulose derivatives from a biomass extraction liquor, the system comprising at least a first hydrolysis reactor and a second hydrolysis reactor. Each of the hydrolysis reactors is in switchable communication with (i) an operating feed stream of a biomass extraction liquor containing water, hemicellulose oligomers, and dissolved or suspended lignin, and (ii) a cleaning feed stream of a cleaning agent selected from the group consisting of steam, an alkaline solution, an organic solvent, and combinations thereof. The cleaning agent dissolves precipitated lignin formed from the lignin under the hydrolysis reaction conditions.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: September 6, 2016
    Assignee: API Intellectual Property Holdings, LLC
    Inventors: Zheng Dang, Mehmet Sefik Tunc, Ziyu Wang
  • Publication number: 20150354019
    Abstract: A continuous process for producing hemicellulose sugars from a biomass extraction liquor is provided. A system is configured for continuously producing hemicellulose sugars and/or hemicellulose derivatives from a biomass extraction liquor, the system comprising at least a first hydrolysis reactor and a second hydrolysis reactor. Each of the hydrolysis reactors is in switchable communication with (i) an operating feed stream of a biomass extraction liquor containing water, hemicellulose oligomers, and dissolved or suspended lignin, and (ii) a cleaning feed stream of a cleaning agent selected from the group consisting of steam, an alkaline solution, an organic solvent, and combinations thereof. The cleaning agent dissolves precipitated lignin formed from the lignin under the hydrolysis reaction conditions.
    Type: Application
    Filed: May 15, 2015
    Publication date: December 10, 2015
    Inventors: Zheng DANG, Mehmet Sefik TUNC, Ziyu WANG
  • Publication number: 20150354017
    Abstract: The invention provides a method for purifying a biomass hydrolysate comprising sugars and suspended particles, comprising centrifuging the biomass hydrolysate, thermally treating the centrifuged hydrolysate to chemically or physically agglomerate the suspended particles, and filtering the thermally treated hydrolysate to remove agglomerated suspended particles, thereby generating a purified hydrolysate (sugar syrup). The sequence of steps may be varied. Biomass hydrolysates may be provided from a wide variety of processes. Surprisingly, a 20-fold improvement in sugar purity (total suspended solids content) is demonstrated experimentally, compared to prior methods.
    Type: Application
    Filed: May 20, 2015
    Publication date: December 10, 2015
    Inventors: Ziyu WANG, Zheng DANG, Mehmet Sefik TUNC, Vesa PYLKKANEN, Theodora RETSINA
  • Publication number: 20150319286
    Abstract: A mobile terminal with a built-in voice message searching function includes: a voice recording module configured to record a voice searching signal from a user and to send the voice searching signal to the pre-processing module for pre-processing, a pre-processing module configured to pre-process the voice searching signal, and to send the pre-processed signal to the matching module for signal matching, a matching module configured to extract a characteristic parameter of the pre-processed signal, to calculate a similarity of the extracted characteristic parameter with a characteristic parameter of a stored voice message, and to send the voice message with a similarity higher than or equal to a threshold to the result outputting module, and a result outputting module configured to display the voice message with the similarity higher than or equal to the threshold on a screen of the mobile terminal
    Type: Application
    Filed: July 9, 2013
    Publication date: November 5, 2015
    Inventor: Zheng Dang
  • Publication number: 20150136345
    Abstract: The present invention provides a process for fractionating lignocellulosic biomass, comprising: digesting a biomass feedstock in the presence of a solvent for lignin, an acid, and water, to produce cellulose-rich solids; separating and washing the cellulose-rich solids with a wash solvent; washing the cellulose-rich solids with water, to generate washed cellulose-rich solids and a wash liquor comprising fines, wherein the wash liquor is introduced to or in contact with a classifier to remove the fines; and separating the fines and recycling the remaining water. The classifier may include a screen with mesh size in the range of 10 to 500, such as 200. The washed cellulose-rich solids will typically have a lower Kappa number (lignin content) and ash content compared to cellulose-rich solids from a process without a classifier that removes fines.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Inventors: Mehmet Sefik TUNC, Zheng DANG, Ziyu WANG, Vesa PYLKKANEN