Patents by Inventor Jianwen Da

Jianwen Da 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).

  • SUPPORTED HYBRID CHROMIUM-BASED CATALYSTS, PROCESSES FOR PREPARING THE SAME, AND USES THEREOF
    Publication number: 20120065345
    Abstract: Disclosed are a supported hybrid chromium-based catalyst comprising a porous inorganic support, at least one inorganic oxide Cr active site (A), and at least one organic Cr active site (B), wherein the at least one inorganic oxide Cr active site (A) and the at least one organic Cr active site (B) are both supported on the porous inorganic support, processes for producing the supported hybrid chromium-based catalyst and processes for producing ethylene homopolymers and/or ethylene copolymers using the catalysts of the present disclosure.
    Type: Application
    Filed: August 12, 2011
    Publication date: March 15, 2012
    Inventors: Yan TANG, Boping Liu, Jianwen Da, Shiliang Zhang, Kan Xie, Qi Dong
  • Method and apparatus for demulsifying an oil-water emulsion via ultrasonic
    Patent number: 7708895
    Abstract: A method for demulsifying water-oil emulsions through ultrasonic action, comprises a step of making the water-oil emulsions flow through at least one ultrasonic acting region in a flow direction, wherein: within the ultrasonic acting region, a concurrent ultrasonic wave whose traveling direction is the same as the flow direction of the water-oil emulsions is generated by at least a one first ultrasonic transducer provided at the upstream end of the ultrasonic acting region, and at same time, a countercurrent ultrasonic wave whose traveling direction is opposite to the flow direction of the water-oil emulsions is generated by at least a one second ultrasonic transducer provided at the downstream end of the ultrasonic acting region; and the concurrent ultrasonic wave and the countercurrent ultrasonic wave act simultaneously on the water-oil emulsions which flow through the ultrasonic acting region, so as to demulsify the water-oil emulsions.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: May 4, 2010
    Assignee: China Petroleum & Chemical Corporation
    Inventors: Shequan Gou, Jianwen Da, Yougui Zhang, Ping Han, Jingyi Zhang
  • Method and Apparatus for Demulsifying an Oil-Water Emulsion Via Ultrasonic
    Publication number: 20070272618
    Abstract: A method for demulsifying water-oil emulsions through ultrasonic action, comprises a step of making the water-oil emulsions flow through at least one ultrasonic acting region in a flow direction, wherein: within the ultrasonic acting region, a concurrent ultrasonic wave whose traveling direction is the same as the flow direction of the water-oil emulsions is generated by at least a one first ultrasonic transducer provided at the upstream end of the ultrasonic acting region, and at same time, a countercurrent ultrasonic wave whose traveling direction is opposite to the flow direction of the water-oil emulsions is generated by at least a one second ultrasonic transducer provided at the downstream end of the ultrasonic acting region; and the concurrent ultrasonic wave and the countercurrent ultrasonic wave act simultaneously on the water-oil emulsions which flow through the ultrasonic acting region, so as to demulsify the water-oil emulsions.
    Type: Application
    Filed: August 27, 2004
    Publication date: November 29, 2007
    Inventors: Shequan Gou, Jianwen Da, Yougui Zhang, Ping Han, Jingyi Zhang