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1. 发明授权

US06284849B1 Method of catalyst transitions in olefin polymerizations 失效
标题翻译：烯烃聚合中催化剂转变的方法
公开(公告)号：US06284849B1
公开(公告)日：2001-09-04
申请号：US09142402
申请日：1999-01-11
申请人： Vidar Almquist , Tone Aastad , Ingrid Sorum Melaaen , Harri Hokkanen , Kalle Kallio
发明人： Vidar Almquist , Tone Aastad , Ingrid Sorum Melaaen , Harri Hokkanen , Kalle Kallio
IPC分类号： C08F238
CPC分类号： C08F10/00 , Y10S526/943 , C08F2/42
摘要： A method for transitioning between two different catalysts in olefin polymerizations, a first catalyst and a second catalyst, comprising the steps of: discontinuing the feed of the first catalyst into the polymerization reactor, and introducing the second catalyst into the reactor, wherein the transition is performed between a chromium-based catalyst and a metallocene catalyst.
摘要翻译：一种用于在烯烃聚合中的两种不同催化剂之间转化的方法，第一催化剂和第二催化剂，包括以下步骤：将第一催化剂进料停止进入聚合反应器，并将第二催化剂引入反应器，其中转变为在铬基催化剂和茂金属催化剂之间进行。

2. 发明授权

US06780809B1 Catalyst for the (co)polymerization of ethylene and a method for the preparation thereof 失效
标题翻译：乙烯（共）聚合的催化剂及其制备方法
公开(公告)号：US06780809B1
公开(公告)日：2004-08-24
申请号：US09601652
申请日：2003-05-21
申请人： Arild Follestad , Vidar Almquist , Ulf Palmqvist , Harri Hokkanen
发明人： Arild Follestad , Vidar Almquist , Ulf Palmqvist , Harri Hokkanen
IPC分类号： B01J3100
CPC分类号： C08F10/00 , C08F4/63912 , C08F4/63916 , C08F4/63925 , C08F4/65912 , C08F4/65925 , C08F10/02 , C08F110/02 , C08F210/16 , C08F4/63904 , C08F4/24 , C08F2500/12 , C08F2500/17 , C08F2500/07 , C08F210/14 , C08F2500/02
摘要： A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with &agr;-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.
摘要翻译：一种用于乙烯或乙烯与α-烯烃聚合的颗粒状改性氧化铬催化剂，包括：a）氧化铬催化剂，b）过渡金属化合物，和c）催化剂活化剂。制备催化剂的方法包括以下步骤：a）将氧化铬催化剂前体（其包含与无机载体结合的氧化铬化合物）在400-950℃的温度下氧化条件，以及b）用催化剂活化剂和过渡金属化合物浸渍所获得的铬催化剂，所述过渡金属化合物包含至少一个与所述过渡金属键合的环戊二烯基环和至少选自烷氧基，酰胺基和烃基的配体的卤素和杂环结合到所述过渡金属上，该环戊二烯基环可以含有杂原子，是未取代的或被取代的，通过桥键合到所述过渡金属上，并任选地退火至其它取代或未取代的环结构，如果存在两个环戊二烯基环，则它们可以通过桥接物彼此结合，并且c）对由此获得的颗粒催化剂进行处理干燥条件。该催化剂适用于在连续供给所有反应物的条件下生产聚乙烯。

3. 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。

4. 发明授权

US06664352B1 Supported polymerization catalysts 失效
标题翻译：负载型聚合催化剂
公开(公告)号：US06664352B1
公开(公告)日：2003-12-16
申请号：US09807144
申请日：2001-04-09
申请人： Siw Fredriksen , Tore Dreng , Vidar Almquist
发明人： Siw Fredriksen , Tore Dreng , Vidar Almquist
IPC分类号： C08F442
CPC分类号： C08F10/00 , C08F4/65912 , C08F4/65922 , C08F110/06 , C08F210/16 , Y10S526/943 , C08F4/027 , C08F4/65916 , C08F2500/12 , C08F210/14 , C08F2500/24 , C08F2500/18
摘要： The invention provides a process for the preparation of a supported polymerization catalyst, said process comprising impregnating a porous particulate support in a mechanically fluidized state with a catalyst material.
摘要翻译：本发明提供了一种制备负载型聚合催化剂的方法，所述方法包括用机械流化状态用催化剂材料浸渍多孔颗粒载体。

5. 发明授权

US06541581B1 Polyethylenes obtained by use of dual site catalyst 失效
标题翻译：通过使用双位点催化剂获得的聚乙烯
公开(公告)号：US06541581B1
公开(公告)日：2003-04-01
申请号：US09601654
申请日：2000-11-29
申请人： Arild Follestad , Vidar Almquist , Espen Ommundsen , Tore Dreng
发明人： Arild Follestad , Vidar Almquist , Espen Ommundsen , Tore Dreng
IPC分类号： C08F424
CPC分类号： C08F10/00 , C08F4/63912 , C08F4/63916 , C08F4/63925 , C08F4/65912 , C08F4/65925 , C08F10/02 , C08F110/02 , C08F210/16 , C08F4/63904 , C08F4/24 , C08F2500/12 , C08F2500/17 , C08F2500/07 , C08F210/14 , C08F2500/02
摘要： A polyethylene produced by the homopolymerisation of ethylene or copolymerisation of ethylene with &agr;-olefins in the presence of a catalyst, characterized in that the fraction of low molecular weight polymers having MW K1·&eegr;0.05+K2, wherein K1 is 9.10−5 and K2 is 0.4.
摘要翻译：通过乙烯均聚或乙烯与α-烯烃在催化剂存在下共聚合得到的聚乙烯，其特征在于，具有MW <5000g /摩尔的低分子量聚合物的分数低于生产的并且所生产的聚乙烯具有由满足以下表达式的转移（HO）值表示的测量的熔体强度：HO> K1.eta0.05 + K2，其中K1为9.10-5，K2为0.4。

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