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    LOW AROMATIC POLYOLEFINS
    2.
    发明申请
    LOW AROMATIC POLYOLEFINS 有权

    公开(公告)号：US20210179743A1

    公开(公告)日：2021-06-17

    申请号：US17088286

    申请日：2020-11-03

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Brian R. Berg ,  Chelsey M. Broussard ,  Chi-I Kuo ,  Porter C. Shannon

    IPC: C08F4/659 ,  C08F10/02 ,  C08F2/34 ,  C08F4/6592

    Abstract: The present disclosure relates to processes for producing a catalyst composition. A process may include mixing a catalyst compound having a transition metal atom, an activator, and a support to form a supported catalyst mixture. A process may also include drying the supported catalyst mixture at a pressure of about 10 kPa or less and a temperature of about 60° C. or greater for a period of about 6 h or less. The present disclosure also relates to processes for producing polyolefins. A process may include introducing a catalyst composition and at least one olefin to a polymerization reactor, where the catalyst composition has about 0.5 wt % to about 1.5 wt % aromatic hydrocarbon content, and less than 1 wt % of aliphatic hydrocarbon content. A process may also include obtaining a polyolefin having about 300 ppb or less aromatic hydrocarbon.

    Processes for Preparing a Catalyst System and Polymerizing Olefins
    9.
    发明申请
    Processes for Preparing a Catalyst System and Polymerizing Olefins 审中-公开

    公开(公告)号：US20200071438A1

    公开(公告)日：2020-03-05

    申请号：US16492996

    申请日：2018-02-28

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Corrine L. Brandl ,  Fred D. Ehrman ,  Edward F. Smith ,  Chi-I Kuo

    IPC: C08F210/16

    Abstract: A process for preparing a catalyst system including contacting one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom with a methylalumoxane and one or more support material compositions to a concentration of methylalumoxane of about 4 mmol to about 15 mmol aluminum per gram of support material is provided. The support material composition may have a macroporosity of from about 0.18 cc/g to about 0.50 cc/g. In other embodiments, a process for polymerizing at least one olefin to produce a polyolefin composition including contacting one or more olefins with the aforementioned catalyst system is also provide.

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