公开(公告)号：US20240166774A1

公开(公告)日：2024-05-23

申请号：US18269368

申请日：2020-12-24

申请人： ZHEJIANG UNIVERSITY

发明人： Wen-Jun WANG ,  Pingwei LIU ,  Liqiong LUO ,  Song WANG ,  Bo-Geng LI

IPC分类号： C08F4/642 ,  C08F2/14 ,  C08F4/02 ,  C08F110/02 ,  C08F110/06

CPC分类号： C08F4/6421 ,  C08F2/14 ,  C08F4/027 ,  C08F110/02 ,  C08F110/06

摘要： A method for preparing a supported olefin polymerization catalyst, comprising: step 1, activating a COF at 0° C.-800° C. for 0.1-48 hours under inert atmosphere or vacuum protection; optionally, step 2, reacting the activated COF with an auxiliary agent in a reaction medium at a temperature of 5° C.-120° C. under inert atmosphere or vacuum protection, and performing solid-liquid separation to obtain a solid phase material, wherein the auxiliary agent is selected from a metal alkyl compound, boron halothane, an alkyl aluminum oxide, a modified methyl aluminoxane, a Lewis acid, and a Grignard reagent; and step 3, under inert atmosphere or vacuum protection, reacting the solid phase material with the olefin polymerization catalyst in a reaction medium at −30° C.-150° C., performing solid-liquid separation, and collecting the solid phase material as the supported olefin polymerization catalyst. A supported olefin polymerization catalyst and an application thereof. The supported catalyst can maintain higher catalytic activity for a long time in olefin polymerization.

公开(公告)号：US20240270883A1

公开(公告)日：2024-08-15

申请号：US18269360

申请日：2020-12-24

申请人： ZHEJIANG UNIVERSITY

发明人： Pingwei LIU ,  Wen-Jun WANG ,  Liqiong LUO ,  Ziyang ZHANG ,  Bo-Geng LI

IPC分类号： C08F110/06 ,  C07F7/00 ,  C07F15/00 ,  C08F110/02 ,  C08F136/06 ,  C08F210/16

CPC分类号： C08F110/06 ,  C07F7/003 ,  C07F15/0066 ,  C08F110/02 ,  C08F136/06 ,  C08F210/16

摘要： The present invention relates to a covalent organic framework which is a two-dimensional polymer formed by repeatedly arranging structural units represented by formula I or formula II and bonding same by means of covalent bonds. The present invention also relates to a catalyst, preparation methods for the covalent organic framework and the catalyst, and applications of the covalent organic framework and the catalyst in catalyzing olefin polymerization. The covalent organic framework can be used as a support to control the stereoregular polymerization of olefins in a confined space. The catalyst has high catalytic activity and good high-temperature stability, and widens the range of types of olefin polymerization catalysts.

公开(公告)号：US20240182624A1

公开(公告)日：2024-06-06

申请号：US17773163

申请日：2020-09-24

申请人： Zhejiang University

发明人： Pingwei LIU ,  Wen-Jun WANG ,  Song WANG

IPC分类号： C08G12/08 ,  B01J13/14 ,  C08G12/40

CPC分类号： C08G12/08 ,  B01J13/14 ,  C08G12/40

摘要： The present invention relates to a method for preparing a hollow covalent organic framework (COF) material and hollow COF material prepared by said method. Said method is characterized in including a monomer displacement step in the method, thereby obtaining the hollow COF material with a controllable particle size, wall thickness and/or specific surface area.