-
公开(公告)号：US5102841A
公开(公告)日：1992-04-07
申请号：US625936
申请日：1990-12-11
申请人： Kevin J. Cann , Robert C. Brady, III , Yimsan Gau
发明人： Kevin J. Cann , Robert C. Brady, III , Yimsan Gau
CPC分类号： C08F10/02 , Y10S526/904
摘要： A process for the production of polyethylene comprising contacting ethylene or a mixture comprising ethylene and one or more alpha-olefins and, optionally, one or more diolefins, under polymerization conditions, with a catalyst system comprising:(a) a particulate catalyst precursor based on titanium or vanadium;(b) polypropylene support particles to which the catalyst precursor particles are bonded; and(c) a hydrocarbyl aluminum cocatalyst.
摘要翻译： 一种用于生产聚乙烯的方法，其包括在聚合条件下使乙烯或包含乙烯和一种或多种α-烯烃和任选的一种或多种二烯烃的混合物与包含以下的催化剂体系接触：（a）基于 钛或钒; （b）催化剂前体颗粒结合的聚丙烯支撑颗粒; 和（c）烃基铝助催化剂。
-
公开(公告)号：US20130005923A1
公开(公告)日：2013-01-03
申请号：US13172969
申请日：2011-06-30
申请人： Ping Cai , Jan W. Van Egmond , Matthew J. Fedec , Jeffrey D. Goad , Robert C. Brady, III , Linfeng Chen
发明人： Ping Cai , Jan W. Van Egmond , Matthew J. Fedec , Jeffrey D. Goad , Robert C. Brady, III , Linfeng Chen
IPC分类号： C08F110/06 , C08F210/14 , C08F210/06
CPC分类号： C08F10/06 , C08F110/06 , C08F210/06 , C08F2/34 , C08F2/005 , C08F2500/18 , C08F2500/24
摘要： The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m3, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.
摘要翻译： 本发明涉及具有较高床堆密度的气相烯烃聚合方法的改进。 该改进涉及当在具有大于128kg / m 3的堆积密度的聚合物床的气相反应器中聚合丙烯时，使用混合的外部电子给体，任选地具有一种或多种共聚单体，其中混合电子给体系统至少包括 第一外电子给体和第二外电子给体，其中第一外电子给体是羧酸酯化合物。
-
3.发明授权Use of methylene-bridged derivatives of cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium as polymerization catalysts 失效使用钛，锆和铪的环戊二烯基二碳化物复合物的亚甲基桥接衍生物作为聚合催化剂
公开(公告)号：US5162466A
公开(公告)日：1992-11-10
申请号：US814810
申请日：1991-12-31
CPC分类号： C08F10/00 , C08F10/02 , C08F4/65912 , C08F4/6592 , Y10S526/943
摘要： Methylene bridged derivatives of novel cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium display high activity as ethylene polymerization catalysts in the absence of a cocatalyst.
-
公开(公告)号：US10647790B2
公开(公告)日：2020-05-12
申请号：US13172969
申请日：2011-06-30
申请人： Ping Cai , Jan W. Van Egmond , Matthew J. Fedec , Jeffrey D. Goad , Robert C. Brady, III , Linfeng Chen
发明人： Ping Cai , Jan W. Van Egmond , Matthew J. Fedec , Jeffrey D. Goad , Robert C. Brady, III , Linfeng Chen
IPC分类号： C08F10/06 , C08F110/06 , C08F210/06
摘要： The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m3, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.
-
5.发明授权Process for producing stereoregular polymers having a narrow molecular weight distribution 失效生产具有窄分子量分布的异质聚合物的方法
公开(公告)号：US5093415A
公开(公告)日：1992-03-03
申请号：US51853
申请日：1987-05-19
CPC分类号： C08F10/00 , Y10S526/901
摘要： Stereoregular polymers having a molecular weight distribution of less than 5.0 and an isotactic index in excess of 96 percent are produced by polymerizing an alpha-olefin having 3 to 8 carbon atoms in a low pressure gas phase fluid bed process at a temperature in excess of 80.degree. C. employing a heat stable catalyst system comprising (a) a solid catalyst component containing magnesium, titanium, halide and a polycarboxylic acid ester containing two coplanar ester groups attached to adjacent carbon atoms, as inside electron donor, (b) an organoaluminum cocatalyst, and (c) a silicon compound containing a silicon-oxygen-carbon linkage, as outside electron donor.
-
6.发明授权
公开(公告)号：US5317036A
公开(公告)日：1994-05-31
申请号：US962119
申请日：1992-10-16
申请人： Robert C. Brady, III , Frederick J. Karol , Timothy R. Lynn , Robert J. Jorgensen , Sun-Chueh Kao , Eric P. Wasserman
发明人： Robert C. Brady, III , Frederick J. Karol , Timothy R. Lynn , Robert J. Jorgensen , Sun-Chueh Kao , Eric P. Wasserman
IPC分类号： C08F4/642 , B01J8/24 , B01J8/38 , C08F2/00 , C08F2/34 , C08F4/60 , C08F4/62 , C08F4/6592 , C08F10/00 , C08F210/18
CPC分类号： C08F2/34 , B01J8/24 , B01J8/382 , C08F210/18 , Y10S526/901 , Y10S526/943
摘要： Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.
摘要翻译： 公开了使用无载体可溶性过渡金属配位催化剂的气相聚合方法。 将催化剂作为溶液引入反应器。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.02 秒)
