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2. 发明授权

US06632896B1 Ethylene polymerization 失效
标题翻译：乙烯聚合
公开(公告)号：US06632896B1
公开(公告)日：2003-10-14
申请号：US09447956
申请日：1999-11-29
申请人： Vidar Almquist , Paul Allemeersch , Roger Goris , Ann Kristin Lindahl
发明人： Vidar Almquist , Paul Allemeersch , Roger Goris , Ann Kristin Lindahl
IPC分类号： C08F442
CPC分类号： C08F10/02 , C08F2410/04 , C08F4/69 , C08F4/24 , C08F4/025
摘要： Ths invention provides a process for the preparation of a polyethylene, in particular an HDPE suitable for blow moulding of HIC, which comprises polymerizing ethylene and, optionally an ethylenically unsaturated comonomer copolymerizable therewith, in the presence of a catalyst comprising a first silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 350 m2/g and a chromium content of 0.1 to 1.0% by weight and a second silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 450 m2/g and a chromium content of 0.1 to 1.0% by weight, wherein the silica support of said first catalyst also comprises alumina and the silica support of said second catalyst also comprises titanium, and preferably a co-catalyst.
摘要翻译：本发明提供了一种制备聚乙烯的方法，特别是适用于HIC的吹塑成型的HDPE，其包括在包含第一二氧化硅载体的铬的催化剂的存在下聚合乙烯和任选的可与其共聚的烯属不饱和共聚单体催化剂的孔体积为至少2mL / g，表面积为至少350μm<2 PDAT> / g，铬含量为0.1〜1.0重量％，第二二氧化硅孔体积为至少2mL / g，表面积至少为450μm<2 PDAT> / g，铬含量为0.1至1.0重量％的载体铬催化剂，其中所述第一催化剂的二氧化硅载体还包含氧化铝，并且所述第二催化剂的二氧化硅载体还包含钛，优选为助催化剂。

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