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    Process for transitioning between Ziegler-Natta-based and chromium-based catalysts
    5.
    发明授权
    Process for transitioning between Ziegler-Natta-based and chromium-based catalysts 有权
    齐格勒 - 纳塔和铬基催化剂之间的过渡过程

    公开(公告)号：US07629422B2

    公开(公告)日：2009-12-08

    申请号：US11312272

    申请日：2005-12-20

    申请人： Mark G. Goode ,  Kevin J. Cann ,  F. David Hussein ,  Robert L. Santana ,  David C. Schutz ,  Agapios K. Agapiou

    发明人： Mark G. Goode ,  Kevin J. Cann ,  F. David Hussein ,  Robert L. Santana ,  David C. Schutz ,  Agapios K. Agapiou

    IPC分类号： C08F2/38 ,  C08F2/34 ,  C08F210/08

    CPC分类号： C08F10/02 ,  C08F210/16 ,  C08F2410/05 ,  Y10S526/901 ,  C08F2/34 ,  C08F2/42 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/18 ,  C08F210/08

    摘要： Embodiments of our invention relate to processes for transitioning among polymerization catalyst systems including processes for transitioning among olefin polymerization reactions using Ziegler-Natta catalysts systems and chromium-based catalyst systems. Among embodiments contemplated are a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor, comprising: adding to the reactor a deactivating agent (DA) selected from one of carbon monoxide, carbon dioxide, or combinations thereof; adding to the reactor a cocatalyst adsorbing agent (CAA), comprising an inorganic oxide selected from one of silica, alumina or combinations thereof; wherein the first catalyst comprises at least one conventional Ziegler-Natta catalyst, and a cocatalyst, wherein the second catalyst comprises at least one chromium-based catalyst, wherein the reactor is a gas-phase, fluidized bed reactor, and wherein the CAA is substantially free of transition metals. In another embodiment a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor is contemplated, comprising: adding a transition aid agent (TAA) wherein the TAA is selected from one of alkoxylated amines, alkoxylated amides, or combinations thereof, wherein the first catalyst comprises at least one Ziegler-Natta catalyst comprising the catalyst, a cocatalyst and optionally a support, and the second catalyst comprises at least one chromium-based catalyst.

    摘要翻译： 本发明的实施方案涉及在聚合催化剂体系中过渡的方法，包括使用齐格勒 - 纳塔催化剂体系和铬基催化剂体系在烯烃聚合反应中过渡的方法。 考虑的实施方案是在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：向反应器中加入选自一氧化碳，二氧化碳或其组合中的一种失活剂（DA）; 向所述反应器中加入选自二氧化硅，氧化铝或其组合的无机氧化物的助催化剂吸附剂（CAA）; 其中所述第一催化剂包含至少一种常规齐格勒 - 纳塔催化剂和助催化剂，其中所述第二催化剂包含至少一种铬基催化剂，其中所述反应器是气相流化床反应器，并且其中所述CAA基本上 没有过渡金属。 在另一个实施方案中考虑了在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：加入转移助剂（TAA），其中TAA选自烷氧基化胺，烷氧基化酰胺或其组合之一 其中所述第一催化剂包含至少一种齐格勒 - 纳塔催化剂，其包含所述催化剂，助催化剂和任选的载体，所述第二催化剂包含至少一种铬基催化剂。

    Ethylene/propylene copolymer rubbers
    8.
    发明授权
    Ethylene/propylene copolymer rubbers 失效
    乙烯/丙烯共聚物橡胶

    公开(公告)号：US5332793A

    公开(公告)日：1994-07-26

    申请号：US84287

    申请日：1993-06-28

    申请人： Kevin J. Cann

    发明人： Kevin J. Cann

    IPC分类号： C08F2/34 ,  C08F4/60 ,  C08F4/68 ,  C08F10/00 ,  C08F10/02 ,  C08F210/00 ,  C08F210/02 ,  C08F210/16

    CPC分类号： C08F210/16 ,  Y10S526/901

    摘要： A process for the production of EPRs comprising contacting ethylene, propylene, and optionally, a diene, under polymerization conditions, with a catalyst system comprising:(A) a catalyst precursor comprising:(i) a vanadium compound, which is the reaction product of(a) VX.sub.3 wherein each X is independently chlorine, bromine, or iodine; and(b) an electron donor, which is a liquid, organic Lewis base in which VX.sub.3 is soluble;(ii) a modifier having the formula BX.sub.3 or AlR.sub.(3-a) X.sub.a wherein each R is independently alkyl having 1 to 14 carbon atoms; each X is as defined above; and a is 1 or 2; and(iii) a support for said vanadium compound and modifier,said catalyst precursor being in an independent or prepolymerized state,wherein said independent catalyst precursor or said prepolymerized catalyst precursor have been pre-oxidized with an oxidant in an amount sufficient to increase the oxidation state of the vanadium by at least one;(B) a cocatalyst consisting essentially of a compound having the formula AlR.sub.(3-a) X.sub.a and, optionally, a compound having the formula AlR.sub.3 wherein R, X, and a are as defined above; and,(C) optionally, a promoter, which is a chlorinated ester having at least 2 chlorine atoms; a saturated or unsaturated aliphatic halocarbon having at least 3 carbon atoms and at least 6 halogen atoms; or a haloalkyl substituted aromatic hydrocarbon wherein the haloalkyl substituent has at least 3 halogen atoms.

    摘要翻译： 一种制备EPR的方法，包括在聚合条件下使乙烯，丙烯和任选的二烯与催化剂体系接触，所述催化剂体系包含：（A）催化剂前体，其包含：（i）钒化合物，其为 （a）VX3，其中每个X独立地是氯，溴或碘; 和（b）电子给体，其是VX3可溶于其中的液体有机路易斯碱; （ii）具有式BX3或AlR（3-a）Xa的改性剂，其中每个R独立地为具有1至14个碳原子的烷基; 每个X如上所定义; a为1或2; 和（iii）对所述钒化合物和改性剂的载体，所述催化剂前体处于独立或预聚合状态，其中所述独立的催化剂前体或所述预聚合的催化剂前体已经用足以增加氧化的量的氧化剂预氧化 钒的状态至少有一个; （B）基本上由具有式AlR（3-a）Xa的化合物和任选的具有式AlR 3的化合物组成的助催化剂，其中R，X和a如上定义; 和（C）任选的是具有至少2个氯原子的氯化酯的助催化剂; 具有至少3个碳原子和至少6个卤素原子的饱和或不饱和脂族卤代烃; 或卤代烷基取代的芳族烃，其中卤代烷基取代基具有至少3个卤素原子。