Patents by Inventor Xiufen Li

Xiufen Li 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: 10886551
    Abstract: The present disclosure discloses a method for synchronously recovering metal and elemental sulfur, particularly to a method for synchronously recovering metal and elemental sulfur in sulfide ore tailings, and belongs to the technical field of waste recycling. According to the present disclosure, metal and sulfur element are transferred from a solid phase to a liquid phase in the form of ions respectively by leaching the sulfide ore tailings in an anode chamber, then metal ions are recovered in the form of hydroxide precipitate in a first cathode chamber, and sulfate ions are recovered in the form of elemental sulfur precipitate in a second cathode chamber. The method of the present disclosure can synchronously realize the recovery of metal and elemental sulfur in sulfide ore tailings, such that a metal recovery rate is up to 89.4%, and an elemental sulfur recovery rate is up to 45.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: January 5, 2021
    Assignee: Jiangnan University
    Inventors: Xiufen Li, Xiguang Qi, Xinhua Wang, Yueping Ren
  • Publication number: 20190338426
    Abstract: The present disclosure discloses a method for synchronously recovering metal and elemental sulfur, particularly to a method for synchronously recovering metal and elemental sulfur in sulfide ore tailings, and belongs to the technical field of waste recycling. According to the present disclosure, metal and sulfur element are transferred from a solid phase to a liquid phase in the form of ions respectively by leaching the sulfide ore tailings in an anode chamber, then metal ions are recovered in the form of hydroxide precipitate in a first cathode chamber, and sulfate ions are recovered in the form of elemental sulfur precipitate in a second cathode chamber. The method of the present disclosure can synchronously realize the recovery of metal and elemental sulfur in sulfide ore tailings, such that a metal recovery rate is up to 89.4%, and an elemental sulfur recovery rate is up to 45.
    Type: Application
    Filed: September 25, 2018
    Publication date: November 7, 2019
    Inventors: Xiufen LI, Xiguang QI, Xinhua WANG, Yueping REN
  • Patent number: 10434475
    Abstract: The present invention relates to a comprehensive evaluation method for the performance of contaminated flat membranes, which relates to the field of sewage and waste resource technology. The present invention firstly analyzed the composition of the surface elements of the contaminated membrane by EDX to determine the type of membrane contamination, and then designed different cleaning schemes for organic or inorganic pollution to obtain a sample membrane. When the tensile strength of the contaminated membrane decreased more than 50% than that of the control membrane, it is a waste membrane; when the tensile strength decreased less than 50% and the membrane flux reduced more than 30%, it is a waste membrane; when tensile strength decreased less than 50%, membrane flux reduced less than 30% and the carbon footprint was more than 188 g, it is a waste membrane; otherwise was a old membrane.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 8, 2019
    Assignee: Jiangnan University
    Inventors: Xiufen Li, Xiaoli Song, Xinhua Wang, Yueping Ren, Xiguang Qi
  • Patent number: 10384968
    Abstract: The invention relates to a ternary sewage treatment method integrating microbial fuel cells with anaerobic acidification and forward osmosis membrane, and belongs to the technical field of sewage treatment. The method of the invention comprises the following steps: Sewage is driven into the anaerobic acidification device for mixture with the NaOH solution. The mixed liquid enters into the MFC for converting the enriched organics to bioelectricity and then flows back to the anaerobic acidification device. A part of the mixed liquid passes through the MF membrane module to form effluent and enters into the sedimentation basin for phosphate removal and finally passes through activated carbon adsorption column, another part passes through the FO membrane module to form effluent and obtain high quality recycled water after the RO membrane processing. The method is a new coupled model of FO membrane and MFC and it provide a ternary combined technique integrating MFCs with anaerobic acidification and FO membrane.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 20, 2019
    Assignee: JIANGNAN UNIVERSITY
    Inventors: Xinhua Wang, Jinmeng Liu, Yuqin Lu, Xiufen Li
  • Publication number: 20190119136
    Abstract: The invention relates to a ternary sewage treatment method integrating microbial fuel cells with anaerobic acidification and forward osmosis membrane, and belongs to the technical field of sewage treatment. The method of the invention comprises the following steps: Sewage is driven into the anaerobic acidification device for mixture with the NaOH solution. The mixed liquid enters into the MFC for converting the enriched organics to bioelectricity and then flows back to the anaerobic acidification device. A part of the mixed liquid passes through the MF membrane module to form effluent and enters into the sedimentation basin for phosphate removal and finally passes through activated carbon adsorption column, another part passes through the FO membrane module to form effluent and obtain high quality recycled water after the RO membrane processing. The method is a new coupled model of FO membrane and MFC and it provide a ternary combined technique integrating MFCs with anaerobic acidification and FO membrane.
    Type: Application
    Filed: July 28, 2016
    Publication date: April 25, 2019
    Inventors: Xinhua Wang, Jinmeng Liu, Yuqin Lu, Xiufen Li
  • Publication number: 20180008935
    Abstract: The present invention relates to a comprehensive evaluation method for the performance of contaminated flat membranes, which relates to the field of sewage and waste resource technology. The present invention firstly analyzed the composition of the surface elements of the contaminated membrane by EDX to determine the type of membrane contamination, and then designed different cleaning schemes for organic or inorganic pollution to obtain a sample membrane. When the tensile strength of the contaminated membrane decreased more than 50% than that of the control membrane, it is a waste membrane; when the tensile strength decreased less than 50% and the membrane flux reduced more than 30%, it is a waste membrane; when tensile strength decreased less than 50%, membrane flux reduced less than 30% and the carbon footprint was more than 188 g, it is a waste membrane; otherwise was a old membrane.
    Type: Application
    Filed: August 15, 2017
    Publication date: January 11, 2018
    Inventors: Xiufen Li, Xiaoli Song, Xinhua Wang, Yueping Ren, Xiguang Qi
  • Patent number: 9755261
    Abstract: The present invention provides a novel method that recovers metal components from sulfide mineral tailings by Microbial Fuel Cell. The traditional bio-hydrometallurgy reaction is split to one oxidization reaction taking place in the anode chamber and one reduction reaction taking place in the cathode chamber. H+ generated during the oxidization reaction is continually transferred to cathode chamber through proton exchange membrane and reacted with O2 to generate H2O, which not only increases the reaction rate in anode chamber but also decreases equipment corrosion caused by excessive H+. The method of the present invention, recovering metals as well as electronic power, is environment-friendly.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: September 5, 2017
    Assignee: Jiangnan University
    Inventors: Xiufen Li, Pengfei Nie, Yueping Ren, Xinhua Wang
  • Publication number: 20170062858
    Abstract: The present invention provides a novel method that recovers metal components from sulfide mineral tailings by Microbial Fuel Cell. The traditional bio-hydrometallurgy reaction is split to one oxidization reaction taking place in the anode chamber and one reduction reaction taking place in the cathode chamber. H+ generated during the oxidization reaction is continually transferred to cathode chamber through proton exchange membrane and reacted with O2 to generate H2O, which not only increases the reaction rate in anode chamber but also decreases equipment corrosion caused by excessive H+. The method of the present invention, recovering metals as well as electronic power, is environment-friendly.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 2, 2017
    Applicant: Jiangnan University
    Inventors: Xiufen Li, Pengfei Nie, Yueping Ren, Xinhua Wang