中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

13 records (took 0.017 seconds)

    Compositions and methods of using preactivated unsupported catalyst compositions having a given concentration
    2.
    发明授权
    Compositions and methods of using preactivated unsupported catalyst compositions having a given concentration 有权
    使用具有给定浓度的预活化的未负载的催化剂组合物的组合物和方法

    公开(公告)号：US06624266B2

    公开(公告)日：2003-09-23

    申请号：US09777244

    申请日：2001-02-05

    Applicant: Kersten Anne Terry ,  Jody Michael Moffett ,  William George Sheard

    Inventor： Kersten Anne Terry ,  Jody Michael Moffett ,  William George Sheard

    IPC: C08F464

    CPC classification number: C08F10/00 ,  C08F4/65912 ,  Y02P20/584 ,  Y10S526/901 ,  Y10S526/919 ,  C08F4/65927

    Abstract: Preactivated unsupported catalyst compositions methods of using them are disclosed whereby the compositions have a concentration of preactivated catalyst of at least about 0.04 mmol of preactivated catalyst per liter of solution when using aliphatic or alicyclic hydrocarbon solvents, and a concentration of less than about 0.80 mmol/liter when using aromatic or halogen-substituted solvents. In the method, an unsupported catalyst precursor first is contacted with an activator, or co-catalyst, in a suitable reaction medium, and then the resulting mixture is contacted with additional solvent to form a preactivated unsupported olefin polymerization catalyst composition that can be fed to a gas phase polymerization reactor without plugging the catalyst injection nozzle. Combining the unsupported catalyst precursor, the co-catalyst and then adding additional solvent to provide such a composition prevents tube plugging, and provides a catalyst material that has high activity, avoids forming significant amounts of polymer agglomerates, and avoids reactor fouling.

    Abstract translation: 公开了预活化的未负载的催化剂组合物的使用方法，其中当使用脂族或脂环族烃溶剂时，组合物具有至少约0.04mmol预活化催化剂的每升溶液的预活化催化剂浓度，并且浓度小于约0.80mmol / 当使用芳族或卤素取代的溶剂时。 在该方法中，首先将未负载的催化剂前体与活化剂或助催化剂在合适的反应介质中接触，然后将所得混合物与另外的溶剂接触以形成预活化的未负载的烯烃聚合催化剂组合物，其可以进料至 气相聚合反应器，不堵塞催化剂注入喷嘴。 结合未负载的催化剂前体，助催化剂，然后加入另外的溶剂以提供这种组合物可防止管堵塞，并提供具有高活性的催化剂材料，避免形成显着量的聚合物附聚物，并避免反应器结垢。

    De-foaming spray dried catalyst slurries
    6.
    发明授权
    De-foaming spray dried catalyst slurries 有权
    脱泡喷雾干燥催化剂浆液

    公开(公告)号：US07566677B2

    公开(公告)日：2009-07-28

    申请号：US11784898

    申请日：2007-04-10

    Applicant: Natarajan Muruganandam ,  Kersten Anne Terry ,  Michael D. Awe ,  John H. Oskam

    Inventor： Natarajan Muruganandam ,  Kersten Anne Terry ,  Michael D. Awe ,  John H. Oskam

    IPC: B01J31/18 ,  B01J31/22 ,  C08F4/6592

    CPC classification number: B01J37/0045 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65925 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  C08F4/65904 ,  C08F2500/12 ,  C08F210/06 ,  C08F4/64148

    Abstract: A method for preparing a spray dried catalyst and a low viscosity, low foam spray dried catalyst system for olefin polymerization are provided. In one aspect, the method includes preparing a catalyst system including one or more components selected from metallocenes, non-metallocenes, and activators, adding mineral oil to the catalyst system to form a slurry, and adding one or more liquid alkanes having three or more carbon atoms to the slurry in an amount sufficient to reduce foaming and viscosity of the slurry. In one aspect, the catalyst system includes one or more catalysts selected from metallocenes, non-metallocenes, and a combination thereof, wherein the catalyst system is spray dried. The system further includes mineral oil to form a slurry including a catalyst system, and one or more liquid alkanes having three or more carbon atoms in an amount sufficient to reduce foaming and viscosity of the slurry.

    Abstract translation: 提供了制备用于烯烃聚合的喷雾干燥催化剂和低粘度低泡沫喷雾干燥催化剂体系的方法。 一方面，该方法包括制备包括选自金属茂，非金属茂和活化剂中的一种或多种组分的催化剂体系，向催化剂体系中加入矿物油以形成浆料，并加入一种或多种具有三种或更多种的液态烷烃 碳原子以足以降低浆料的起泡和粘度的量加入到浆料中。 一方面，催化剂体系包括一种或多种选自金属茂，非金属茂及其组合的催化剂，其中催化剂体系是喷雾干燥的。 该系统还包括矿物油，以形成包括催化剂体系的浆料和一种或多种具有三个或更多个碳原子的液体烷烃，其量足以减少浆料的起泡和粘度。

Patent Agency Ranking