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48 条记录 (耗时 0.022 秒)

    PRESSURE CONTROL OF THE CATALYST MIXING VESSEL
    21.
    发明申请
    PRESSURE CONTROL OF THE CATALYST MIXING VESSEL 有权
    催化混合容器的压力控制

    公开(公告)号：US20130130891A1

    公开(公告)日：2013-05-23

    申请号：US13812731

    申请日：2011-07-29

    申请人： Alain Brusselle ,  Daan Dewachter ,  Louis Fouarge

    发明人： Alain Brusselle ,  Daan Dewachter ,  Louis Fouarge

    IPC分类号： B01J31/00 ,  G05D16/02 ,  C08F4/76 ,  B01J21/00

    CPC分类号： G05D16/02 ,  B01J8/0035 ,  B01J8/20 ,  B01J2219/00162 ,  C08F4/76 ,  C08F10/02 ,  C08F2/14 ,  C08F2/01

    摘要： The present invention relates to a process for preparing catalyst slurry in a catalyst slurry preparation system and supplying catalyst slurry to an ethylene polymerization loop reactor wherein an accurate control of the pressure within said catalyst slurry preparation system is provided. More particularly, the present invention provides a method for preparing a catalyst slurry and supplying said catalyst slurry to an ethylene polymerization loop reactor, said catalyst slurry comprising solid catalyst and a liquid hydrocarbon diluent, wherein said method comprises the steps of: (a) feeding concentrated catalyst slurry to a mixing vessel by means of a feeding device; (b) diluting said concentrated catalyst slurry in a suitable amount of said diluent in a mixing vessel thereby obtaining a diluted catalyst slurry having a concentration suitable for use in an ethylene polymerization reaction; wherein said mixing vessel is provided with at least one pressure regulating unit connected therewith and wherein said pressure regulating unit comprises a pulsation dampener; and (c) transferring said diluted catalyst slurry from said mixing vessel to said ethylene polymerization loop reactor; characterized in that the method comprises the step of maintaining said mixing vessel essentially free of a gaseous phase by regulating the pressure in said mixing vessel using said at least one pressure regulating unit comprising the pulsation dampener.

    摘要翻译： 本发明涉及一种在催化剂浆料制备系统中制备催化剂浆料并将催化剂浆料供应到乙烯聚合反应器中的方法，其中提供了所述催化剂浆料制备系统内的压力的精确控制。 更具体地说，本发明提供了一种制备催化剂浆料并将所述催化剂浆料供应到乙烯聚合反应器的方法，所述催化剂浆料包括固体催化剂和液体烃稀释剂，其中所述方法包括以下步骤：（a） 浓缩的催化剂浆料通过进料装置进入混合容器; （b）将所述浓缩催化剂浆液在合适量的稀释剂中稀释在混合容器中，由此获得具有适合用于乙烯聚合反应的浓度的稀释催化剂浆料; 其中所述混合容器设置有与其连接的至少一个压力调节单元，并且其中所述压力调节单元包括脉动阻尼器; 和（c）将所述稀释的催化剂浆料从所述混合容器转移到所述乙烯聚合反应器中; 其特征在于，所述方法包括通过使用包括脉动阻尼器的所述至少一个压力调节单元来调节所述混合容器中的压力来维持所述混合容器基本上不含气相的步骤。

    Catalyst metering device
    22.
    发明申请
    Catalyst metering device 有权

    公开(公告)号：US20130118591A1

    公开(公告)日：2013-05-16

    申请号：US13811686

    申请日：2011-07-29

    申请人： Daan Dewachter ,  Daniel Bekaert

    发明人： Daan Dewachter ,  Daniel Bekaert

    IPC分类号： F17D3/00

    CPC分类号： B01J8/001 ,  B01J8/0015 ,  B01J2204/002 ,  B01J2208/00752 ,  F17D3/00 ,  Y10T137/0318

    摘要： The invention relates to a catalyst metering device with a valve formed of an iron-based alloy steel hardened to a Rockwell hardness C of at least 60. The device can be used for metering of a catalyst for an ethylene polymerization reaction. The invention further relates to ethylene polymerization wherein the catalyst is metered in a catalyst metering device with a iron-based alloy steel hardened valve, as well as to a ethylene polymerization reactor comprising such a catalyst metering device.

    Process for supplying catalyst to a polymerization reactor
    26.
    发明申请
    Process for supplying catalyst to a polymerization reactor 有权
    向聚合反应器供应催化剂的方法

    公开(公告)号：US20130125996A1

    公开(公告)日：2013-05-23

    申请号：US13812713

    申请日：2011-07-29

    申请人： Daan Dewachter ,  Alain Brusselle

    发明人： Daan Dewachter ,  Alain Brusselle

    IPC分类号： F03B17/00

    CPC分类号： F03B17/00 ,  B01J8/002 ,  B01J2208/00752 ,  C08F4/65916 ,  C08F10/00 ,  C08F210/16 ,  Y10S417/90 ,  Y10S526/919 ,  Y10T137/0318 ,  C08F2/14 ,  C08F2/01 ,  C08F210/14

    摘要： The present invention relates to a method for feeding metallocene catalyst slurry to an olefin polymerization loop reactor (1) using a positive displacement device (5) positive displacement device comprising a first chamber and a second chamber, each chamber having an inlet and an outlet and each chamber comprising an ball arranged between the walls of said chamber, wherein said chambers are connected to each other by a pump chamber operably connected to a pump, wherein, the difference between the diameter of said ball and the diameter of said chamber is comprised between 5 to 200 times the average particle size (d50) of said catalyst.

    摘要翻译： 本发明涉及使用包括第一室和第二室的正位移装置（5）的正位移装置将茂金属催化剂浆料供给到烯烃聚合反应器（1）的方法，每个室具有入口和出口， 每个室包括布置在所述室的壁之间的球，其中所述室通过可操作地连接到泵的泵室彼此连接，其中，所述球的直径和所述室的直径之间的差包括在 所述催化剂的平均粒度（d50）为5〜200倍。

    PUMP FOR LOOP REACTOR
    27.
    发明申请
    PUMP FOR LOOP REACTOR 有权
    泵反循环泵

    公开(公告)号：US20130123442A1

    公开(公告)日：2013-05-16

    申请号：US13812756

    申请日：2011-07-29

    申请人： Frank Timmermans ,  Wouter Ooms ,  Daan Dewachter ,  Louis Fouarge

    发明人： Frank Timmermans ,  Wouter Ooms ,  Daan Dewachter ,  Louis Fouarge

    IPC分类号： F04D3/00

    CPC分类号： B01J19/1875 ,  B01J19/1837 ,  C08F10/02 ,  C08F110/02 ,  F04D3/00 ,  F04D29/181 ,  C08F2/14 ,  C08F2/01 ,  C08F2500/05 ,  C08F2500/24

    摘要： The present invention relates the use of a pump in a loop reactor for the production of polyethylene, as well as a reactor comprising such pump and methods for producing polyolefin by means of such reactor. The pump according to the invention is characterized in that it is an axial flow impeller circulation pump, wherein the impeller comprises 6 blades and wherein the pump is fixed on a spring supported frame. Use of the pump according to the present invention allows for preparation of homogeneous polyethylene products that meet high quality standards from the complicated ethylene polymerization mixtures while at the same time being produced with low energy consumption.

    摘要翻译： 本发明涉及用于生产聚乙烯的环管反应器中的泵的使用，以及包括这种泵的反应器和通过这种反应器生产聚烯烃的方法。 根据本发明的泵的特征在于它是轴流式叶轮循环泵，其中叶轮包括6个叶片，并且其中泵固定在弹簧支撑的框架上。 根据本发明的泵的使用允许制备符合来自复杂乙烯聚合混合物的高质量标准的均质聚乙烯产品，同时以低能量消耗生产。

    METHOD FOR NEUTRALIZING POLYMERIZATION CATALYST
    28.
    发明申请
    METHOD FOR NEUTRALIZING POLYMERIZATION CATALYST 有权
    中和聚合催化剂的方法

    公开(公告)号：US20120271012A1

    公开(公告)日：2012-10-25

    申请号：US13514355

    申请日：2010-12-17

    申请人： Daan Dewachter

    发明人： Daan Dewachter

    IPC分类号： B08B9/093 ,  C08F110/02 ,  B08B9/032 ,  C08F2/01

    CPC分类号： C08F6/02 ,  B01J8/003 ,  B01J8/0035 ,  B01J2208/00752 ,  C08F6/003 ,  C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08L23/06 ,  C08F2/14

    摘要： The present invention relates to a process for cleaning a catalyst slurry preparation system and/or a catalyst preparation system. More particularly, the invention relates to a cleaning process for a catalyst preparation system and/or for a catalyst slurry preparation system, wherein an aqueous catalyst inactivation agent is used to rinse the systems, or any parts thereof. The catalysts used in the present invention may be chromium, Ziegler-Natta or metallocene catalysts.

    摘要翻译： 本发明涉及清洁催化剂浆料制备系统和/或催化剂制备系统的方法。 更具体地，本发明涉及用于催化剂制备系统和/或催化剂浆料制备系统的清洁方法，其中使用含水催化剂灭活剂来漂洗系统或其任何部分。 用于本发明的催化剂可以是铬，齐格勒 - 纳塔或茂金属催化剂。

    METHOD FOR REPLACING COMPATIBLE ETHYLENE POLYMERIZATION CATALYSTS
    29.
    发明申请
    METHOD FOR REPLACING COMPATIBLE ETHYLENE POLYMERIZATION CATALYSTS 有权
    替代相容乙烯聚合催化剂的方法

    公开(公告)号：US20120252989A1

    公开(公告)日：2012-10-04

    申请号：US13514101

    申请日：2010-12-17

    申请人： Daan Dewachter ,  Martine Slawinski

    发明人： Daan Dewachter ,  Martine Slawinski

    IPC分类号： C08F2/06 ,  C08F2/01 ,  C08F4/42

    CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08F2410/05 ,  C08F2/01

    摘要： The present invention relates to a method for optimizing the sequential feeding of at least two ethylene polymerization catalysts to an ethylene polymerization reactor, comprising: transferring to a mixing vessel a first ethylene polymerization catalyst and a first diluent, decreasing the concentration of said first ethylene polymerization catalyst in said mixing vessel, transferring to said mixing vessel a second ethylene polymerization catalyst and a second diluent, progressively replacing said first ethylene polymerization catalyst by said second ethylene polymerization catalyst and said first diluent by said second diluent, increasing the concentration of said second ethylene polymerization catalyst in said mixing vessel, sequentially transferring said first ethylene polymerization catalyst and said second ethylene polymerization catalyst from said mixing vessel to an ethylene polymerization reactor.

    摘要翻译： 本发明涉及一种用于优化至少两种乙烯聚合催化剂顺序进料到乙烯聚合反应器的方法，包括：将混合容器转移到第一乙烯聚合催化剂和第一稀释剂中，降低所述第一乙烯聚合的浓度 在所述混合容器中，将第二乙烯聚合催化剂和第二稀释剂转移到所述混合容器中，通过所述第二稀释剂逐渐用所述第二乙烯聚合催化剂和所述第一稀释剂代替所述第一乙烯聚合催化剂，增加所述第二乙烯的浓度 聚合催化剂，将所述第一乙烯聚合催化剂和所述第二乙烯聚合催化剂从所述混合容器依次转移到乙烯聚合反应器中。

    POLYMERIZATION PROCESS WITH IMPROVED POLYMER HOMOGENEITY
    30.
    发明申请
    POLYMERIZATION PROCESS WITH IMPROVED POLYMER HOMOGENEITY 有权
    具有改进的聚合物均聚物的聚合方法

    公开(公告)号：US20120157638A1

    公开(公告)日：2012-06-21

    申请号：US13376522

    申请日：2010-06-18

    申请人： Daan Dewachter

    发明人： Daan Dewachter

    IPC分类号： C08F2/01 ,  C08F10/00 ,  G05B1/00

    CPC分类号： B01J8/001 ,  B01J19/24 ,  B01J19/2415 ,  B01J19/2435 ,  B01J2219/00069 ,  B01J2219/00164 ,  C08F210/16 ,  Y10T137/86485 ,  C08F2/14 ,  C08F2/38 ,  C08F210/14 ,  C08F2500/12

    摘要： The present invention relates to a process for the polymerization of an olefin monomer. In particular, the present invention relates to a process for the polymerization of an olefin monomer and one or more optional comonomers in presence of a polymerization catalyst and hydrogen, said process being characterized by an improved control of the hydrogen concentration in the polymerization reactor. In addition, the present invention provides for an improved hydrogen feeding system to a polymerization reactor. Furthermore, the present invention provides for a polymerization reactor comprising such an improved hydrogen feeding system.

    摘要翻译： 本发明涉及烯烃单体的聚合方法。 特别地，本发明涉及在聚合催化剂和氢存在下聚合烯烃单体和一种或多种任选的共聚单体的方法，所述方法的特征在于改进了对聚合反应器中氢浓度的控制。 此外，本发明提供了一种改进的聚合反应器的氢气供给系统。 此外，本发明提供一种包含这种改进的氢气供给系统的聚合反应器。