Patents by Inventor Xiaolan Shi

Xiaolan Shi 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).

  • Metallocene adduct, its preparation and its application in olefin polymerization
    Patent number: 6057467
    Abstract: This invention relates to an three-constituent adduct of a metallocene.an ether.an metal halide having the general formula of Cp'MQ.sub.2.RXR'.nM'Q.sub.2/n, where Cp' is a substituted or an unsubstituted dicyclopentadienyl, M is zirconium or titanium, RXR' is tetrahydrofuran or diethylether, M' is alkali metal or alkali earth metal, n=1 or 2. The adduct can be exposed to air for several hours or stored in nitrogen atmosphere for a long period of time, which is prepared by means of a simple and convenient process without further separation and purification and used directly as a catalyst for polymerization of olefins.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: May 2, 2000
    Assignees: Research Institute of Petroleum Processing, SINOPEC, China Petrochemical Corp.
    Inventors: Wei Chen, Ruen Wang, Zhenhua Jing, Weimin Wu, Zifang Guo, Xiaolan Shi, Lixin Zhang