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公开(公告)号：US20100075840A1
公开(公告)日：2010-03-25
申请号：US12565559
申请日：2009-09-23
IPC分类号： B01J23/26
CPC分类号： B01J37/08 , B01J23/26 , C08F10/00 , C08F10/02 , C08F110/02 , C08F2500/12 , C08F2500/17 , C08F4/24
摘要： New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours.
摘要翻译： 用于活化聚合反应的铬催化剂的新方法减少了活化所需的时间和增加催化剂活性。 快速加热到第一温度之后是加热到更高的第二温度之前的第一保持期，并将第二温度保持第二保持期。 在一个方面，整体激活过程需要不到10小时。
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公开(公告)号：US06875835B2
公开(公告)日：2005-04-05
申请号：US10321801
申请日：2002-12-16
CPC分类号： F16L9/127 , C08F10/00 , C08F210/16 , Y10T428/139 , C08F4/69 , C08F210/14 , C08F2500/12 , C08F2500/07 , C08F2500/13 , C08F2500/04 , C08F4/025
摘要： A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialkylboron and thalkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.
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公开(公告)号：US06657023B2
公开(公告)日：2003-12-02
申请号：US09773296
申请日：2001-01-31
申请人： Joseph J. Bergmeister , Steven J. Secora , Gerhard K. Guenther , Elizabeth A. Benham , Max P. McDaniel
发明人： Joseph J. Bergmeister , Steven J. Secora , Gerhard K. Guenther , Elizabeth A. Benham , Max P. McDaniel
IPC分类号： C08F422
CPC分类号： C08F210/16 , C08F4/69 , C08F4/24 , C08F4/025 , C08F210/14 , C08F2500/12 , C08F2500/04 , C08F2500/07 , C08F2500/13 , C08F2500/14
摘要： Polymerization processes for ethylene and at least one mono-1-olefin comonomer having from about three to eight carbon atoms per molecule in the presence of a twice-aged catalyst system comprising chromium supported on a silica-titania support and a trialkylboron compound is provided. Novel ethylene copolymers also are produced.
摘要翻译： 提供了在包含载于二氧化硅 - 二氧化钛载体上的铬和三烷基硼化合物的两倍老化的催化剂体系存在下，每分子具有约3-8个碳原子的至少一种乙烯和至少一种单-1-烯烃共聚单体的聚合方法。 还生产新的乙烯共聚物。
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公开(公告)号：US06525148B1
公开(公告)日：2003-02-25
申请号：US09640868
申请日：2000-08-18
IPC分类号： C08F452
CPC分类号： F16L9/127 , C08F10/00 , C08F210/16 , Y10T428/139 , C08F4/69 , C08F210/14 , C08F2500/12 , C08F2500/07 , C08F2500/13 , C08F2500/04 , C08F4/025
摘要： A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyaluminum, and a combination of trialkylboron and trialkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.
摘要翻译： 可以使用活化的含铬催化剂体系和选自三烷基硼，三烷基硅氧烷铝和三烷基硼和三烷基铝化合物的组合的助催化剂来制备乙烯和较高级α-烯烃（优选1-己烯）的共聚物。 聚合过程必须仔细控制，以产生具有非常宽的分子量分布，极高的PENT ESCR值和天然分支分布的共聚物树脂，其优选地影响聚合物的高分子量部分的分支。 所得共聚物树脂在高刚度管道应用中特别有用。
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公开(公告)号：US06465586B2
公开(公告)日：2002-10-15
申请号：US09440366
申请日：1999-11-12
IPC分类号： C08F444
CPC分类号： C08F10/00 , C08F210/16 , C08F4/69 , C08F2/14 , C08F210/14 , C08F2500/12 , C08F2500/04 , C08F2500/07 , C08F2500/13 , C08F2500/14 , C08F4/025
摘要： An olefin polymerization process is provided comprising contacting an olefin monomer with chromium oxide on a titanium containing silica support having less than about 3 weight percent titanium in combination with an organoboron promoter. Polymers thus produced are useful for blow molding applications.
摘要翻译： 提供了一种烯烃聚合方法，包括使烯属单体与含有少于约3重量％钛的含钛二氧化硅载体上的氧化铬接触，与有机硼助催化剂组合。 如此生产的聚合物可用于吹塑应用。
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86.发明授权System of chromium catalyst and yttrium catalyst, olefin polymerization process, and polymer 失效铬催化剂和钇催化剂体系，烯烃聚合方法和聚合物
公开(公告)号：US5399622A
公开(公告)日：1995-03-21
申请号：US153694
申请日：1993-11-17
IPC分类号： C08F4/22 , C08F4/06 , C08F4/42 , C08F4/54 , C08F4/60 , C08F4/69 , C08F10/00 , C08F4/78 , C08F10/02 , C08F10/14
CPC分类号： C08F10/00 , Y10S525/902 , Y10S526/905
摘要： A catalyst system for the polymerization of alpha-olefins comprising a chromium-containing catalyst and an yttrium-containing catalyst wherein the yttrium-containing catalyst is represented by the formula (Cp.sub.2 YX.sub.x).sub.y.M.sub.z L.sub.n, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with alkyl or alkyl silyl radical or radicals, X is a halogen, M is an alkali metal, L is a suitable electron donor ligand, x is 1 or 2, y is 1 or 2, z is 0 or 1, and n is a number corresponding to the value needed to form a stable complex, with the proviso that when y is 2, z and n are 0 is provided. Also disclosed is a polymerization process employing such a catalyst system, and novel olefin polymers. Polymers thus produced exhibit high bulk density and a broad molecular weight distribution.
摘要翻译： 包含含铬催化剂和含钇催化剂的α-烯烃聚合催化剂体系，其中含钇催化剂由式（Cp2YXx）y.MzLn表示，其中Cp是环烷基或环烷基，被烷基或 烷基甲硅烷基或自由基，X是卤素，M是碱金属，L是合适的电子给体配体，x是1或2，y是1或2，z是0或1，n是对应于 形成稳定复合物所需的值，条件是当y为2时，z和n为0。 还公开了使用这种催化剂体系的聚合方法和新的烯烃聚合物。 如此制备的聚合物表现出高的堆积密度和宽的分子量分布。
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公开(公告)号：US5284811A
公开(公告)日：1994-02-08
申请号：US69695
申请日：1993-06-01
CPC分类号： C08F10/00
摘要： An improved supported chromium oxide catalyst, a process for preparing the catalyst and a process for polymerizing olefin monomers utilizing the catalyst are provided. In accordance with the preparation process, chromium oxide and a support containing one or more of silica, titania, thoria, alumina, zirconia or aluminophosphates are combined, impregnated with a metal salt and activated. The metal salt is selected from the group consisting of alkali metal salts, alkaline earth metal salts and mixtures thereof.
摘要翻译： 提供改进的负载型氧化铬催化剂，制备催化剂的方法和利用该催化剂聚合烯烃单体的方法。 根据制备方法，将氧化铬和含有二氧化硅，二氧化钛，氧化钍，氧化铝，氧化锆或铝磷酸盐中的一种或多种的载体合并，浸渍金属盐并活化。 金属盐选自碱金属盐，碱土金属盐及其混合物。
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公开(公告)号：US5275992A
公开(公告)日：1994-01-04
申请号：US986230
申请日：1992-12-07
CPC分类号： C08F10/00 , Y10S526/904
摘要： A process is disclosed for the particle form polymerization of olefins. The process employs a titanium-containing having hydrocarbon soluble titanium components. The resulting catalyst is pretreated with an organometallic reducing agent prior to the introduction of the catalyst into the polymerization zone to give a catalyst which can be used satisfactorily in a loop reactor with lower levels of cocatalyst.
摘要翻译： 公开了用于烯烃的颗粒形式聚合的方法。 该方法采用含有可溶解钛组分的钛。 在将催化剂引入聚合区之前，将所得催化剂用有机金属还原剂预处理，得到可在具有较低水平助催化剂的环管反应器中令人满意地使用的催化剂。
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公开(公告)号：US5171801A
公开(公告)日：1992-12-15
申请号：US615519
申请日：1990-11-19
IPC分类号： C08F10/00 , C08F110/02
CPC分类号： C08F10/00 , C08F110/02
摘要： Olefins are polymerized with a catalyst composition which forms on mixing a supported chromium oxide catalyst system and a silane compound. This composition allows the production of one or more comonomers in-situ. The resultant polymer has a lower density, a higher melt index, and a higher high load melt index than polymers produced with a similar catalyst system in the absence of a silane compound.
摘要翻译： 烯烃与在负载的氧化铬催化剂体系和硅烷化合物混合时形成的催化剂组合物聚合。 该组合物允许原位生产一种或多种共聚单体。 与不存在硅烷化合物的类似催化剂体系制备的聚合物相比，所得聚合物具有较低的密度，较高的熔体指数和更高的高负荷熔体指数。
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公开(公告)号：US08809472B2
公开(公告)日：2014-08-19
申请号：US13094408
申请日：2011-04-26
CPC分类号： C08F210/16 , C08F10/00 , C08F2/38 , C08F210/08 , C08F2500/07 , C08F2500/12 , C08F210/14 , C08F4/78
摘要： A method comprising contacting an olefin in the presence of a catalyst and a melt index modifier (MIM) under conditions suitable to form a polyolefin and recovering the polyolefin, wherein the polyolefin melt index is increased by at least about 25%, wherein the normalized catalyst activity is decreased by less than about 10%, and wherein the MIM is characterized by the general formula R1—HC═CH—R2 or R3R4C═CH2 where R1, R2, R3, R4 are each selected from the group consisting of a non-aromatic organyl group.
摘要翻译： 一种方法，包括在适于形成聚烯烃和回收聚烯烃的条件下，在催化剂和熔体指数调节剂（MIM）存在下使烯烃接触，其中聚烯烃熔体指数增加至少约25％，其中归一化催化剂 活性降低小于约10％，其中MIM的特征在于通式为R 1 -H HC = CH-R 2或R 3 R 4C≡CH2，其中R 1，R 2，R 3，R 4各自选自非 - 芳香族有机基团。
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