Patents by Inventor Biyu Sun

Biyu Sun 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).

  • Process for recycling chromium from waste water containing hexavalent chromium
    Patent number: 10577676
    Abstract: A process for recovering chromium from hexavalent chromium-containing wastewater comprises the following steps: (1) extracting hexavalent chromium in wastewater to an organic phase by using an extracting agent, and separating hexavalent chromium from a water phase, so as to acquire a hexavalent chromium-loaded organic phase; (2) reducing the hexavalent chromium-loaded organic phase by using an aqueous solution of an organic reducing agent, reducing hexavalent chromium into trivalent chromium, reversely extracting trivalent chromium into the water phase, and separating the organic phase from the water phase to acquire a solution of the trivalent chromium and a renewable organic phase, wherein the organic reducing agent is one or a mixture of alcohols, aldehydes and carboxylic acids having the carbon atom number ranging 1 to 3; and (3) performing solvent evaporation on the solution of trivalent chromium, catalyzing, and recovering the trivalent chromium.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 3, 2020
    Assignee: HUNAN YONKER ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE CO., LTD
    Inventors: Qianfeng He, Leshan Song, Haiyan Yan, Xiongjie Que, Bao Liu, Qunhuan Cai, Jie Liu, Yongge Yao, Biyu Sun
  • PROCESS FOR RECYCLING CHROMIUM FROM WASTE WATER CONTAINING HEXAVALENT CHROMIUM
    Publication number: 20170268080
    Abstract: A process for recovering chromium from hexavalent chromium-containing wastewater comprises the following steps: (1) extracting hexavalent chromium in wastewater to an organic phase by using an extracting agent, and separating hexavalent chromium from a water phase, so as to acquire a hexavalent chromium-loaded organic phase; (2) reducing the hexavalent chromium-loaded organic phase by using an aqueous solution of an organic reducing agent, reducing hexavalent chromium into trivalent chromium, reversely extracting trivalent chromium into the water phase, and separating the organic phase from the water phase to acquire a solution of the trivalent chromium and a renewable organic phase, wherein the organic reducing agent is one or a mixture of alcohols, aldehydes and carboxylic acids having the carbon atom number ranging 1 to 3; and (3) performing solvent evaporation on the solution of trivalent chromium, catalyzing, and recovering the trivalent chromium.
    Type: Application
    Filed: June 25, 2015
    Publication date: September 21, 2017
    Applicant: Hunan Yonker Environmental Protection Research Institute Co., LTD
    Inventors: Qianfeng He, Leshan Song, Haiyan Yan, Xiongjie Que, Bao Liu, Qunhuan Cai, Jie Liu, Yongge Yao, Biyu Sun