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34 条记录 (耗时 0.035 秒)

    CONTINUOUS ETHYLENE TETRAMERIZATION PROCESS
    12.
    发明申请
    CONTINUOUS ETHYLENE TETRAMERIZATION PROCESS 有权
    连续乙烯四面体方法

    公开(公告)号：US20150284303A1

    公开(公告)日：2015-10-08

    申请号：US14443838

    申请日：2013-12-04

    申请人： Peter ZORICAK ,  Stephen John BROWN ,  P. Scott CHISHOLM ,  NOVA CHEMICALS (INTERNATIONAL) S.A.

    发明人： Peter Zoricak ,  Stephen John Brown ,  P. Scott Chisholm

    IPC分类号： C07C2/34

    CPC分类号： C07C2/34 ,  C07C2/36 ,  C07C2523/26 ,  C07C2531/14 ,  C07C2531/22 ,  C07C2531/24 ,  Y02P20/52 ,  C07C11/02

    摘要： A continuous flow process for the oligomerization of ethylene using a chromium catalyst having a phosphorus-nitrogen-phosphorus (“P—N—P”) ligand provides high selectivity to the desired tetramer (1-octene) with reduced production of coproduct C10+ oligomers. Prior art processes that maximize catalyst activity have provided comparatively poor product selectivity. In particular, the production of larger amounts of C10+ oligomers have been observed under conditions that maximize activity. The present process resolves this problem through the use of a combination of low catalyst concentration and by limiting the octene concentration in the reactor.

    摘要翻译： 使用具有磷 - 氮 - 磷（“P-N-P”）配体的铬催化剂使乙烯低聚的连续流动方法对所需的四聚体（1-辛烯）提供了高选择性，同时产生了副产物C10 +低聚物。 使催化剂活性最大化的现有技术方法提供了较差的产物选择性。 特别地，在活性最大化的条件下观察到产生较大量的C10 +低聚物。 本方法通过使用低催化剂浓度和限制反应器中辛烯浓度的组合来解决这个问题。

    Process to prepare ethylene propylene elastomer
    13.
    发明授权
    Process to prepare ethylene propylene elastomer 有权
    制备乙烯丙烯弹性体的方法

    公开(公告)号：US06486276B1

    公开(公告)日：2002-11-26

    申请号：US09862189

    申请日：2001-05-21

    申请人： Qinyan Wang ,  Stephen John Brown

    发明人： Qinyan Wang ,  Stephen John Brown

    IPC分类号： C08F416

    CPC分类号： C08F210/16 ,  C08F4/65908 ,  C08F4/65912 ,  C08F210/18 ,  Y10S526/943 ,  C08F4/6592 ,  C08F2/06 ,  C08F210/06 ,  C08F2500/03 ,  C08F2500/21 ,  C08F2500/25

    摘要： A solution polymerization process for the preparation of elastomeric ethylene propylene (diene) elastomers is characterized by the use of a) an unbridged catalyst having a cyclopentadienyl ligand and a monosubstituted nitrogen ligand; and b) a boron activator. High molecular weight elastomers may be inexpensively prepared by the process of this invention. The elastomers are suitable for the manufacture of rubber sheets or membranes and automotive parts such as seals, belts, hoses and tire sidewalls.

    摘要翻译： 用于制备弹性体乙烯丙烯（二烯）弹性体的溶液聚合方法的特征在于使用a）具有环戊二烯基配体和单取代的氮配体的未桥连催化剂; 和b）硼活化剂。 高分子量弹性体可以通过本发明的方法廉价地制备。 弹性体适用于制造橡胶片或膜以及汽车部件，例如密封件，皮带，软管和轮胎侧壁。

    Multi reactor process
    19.
    发明申请
    Multi reactor process 有权
    多反应堆工艺

    公开(公告)号：US20110144289A1

    公开(公告)日：2011-06-16

    申请号：US12928197

    申请日：2010-12-06

    申请人： Lauwrence Martin Jozef Van Asseldonk ,  Stephen John Brown

    发明人： Lauwrence Martin Jozef Van Asseldonk ,  Stephen John Brown

    IPC分类号： C08F2/01

    CPC分类号： C08F210/16 ,  C08F2/06 ,  C08F2/001 ,  C08F210/14 ,  C08F2500/12

    摘要： This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.

    摘要翻译： 本发明涉及使用与管式反应器串联连续搅拌的罐式反应器（CSTR）聚合乙烯聚合物。 管式反应器从CSTR接收聚合物溶液。 管式反应器中的进一步聚合提高了生产效率，特别是在降低从溶液中回收聚合物和残余共聚单体所需的能量的量方面。 已经发现在管式反应器中使用回火（即加热的）乙烯以减轻凝胶问题并降低/降低己烷可萃取物的含量。