中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

160 records (took 0.039 seconds)

    Process of melt index control
    2.
    发明授权
    Process of melt index control 有权
    熔体指数控制过程

    公开(公告)号：US08809472B2

    公开(公告)日：2014-08-19

    申请号：US13094408

    申请日：2011-04-26

    Applicant: Elizabeth A. Benham ,  Charles R. Nease ,  Max P. McDaniel

    Inventor： Elizabeth A. Benham ,  Charles R. Nease ,  Max P. McDaniel

    IPC: C08F4/24 ,  C08F4/62 ,  C08F10/14 ,  C08F10/04 ,  C08F10/00 ,  C08F210/16

    CPC classification number: C08F210/16 ,  C08F10/00 ,  C08F2/38 ,  C08F210/08 ,  C08F2500/07 ,  C08F2500/12 ,  C08F210/14 ,  C08F4/78

    Abstract: 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.

    Abstract translation: 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。

    Methods of preparing a polymerization catalyst
    6.
    发明授权
    Methods of preparing a polymerization catalyst 有权
    制备聚合催化剂的方法

    公开(公告)号：US08697599B2

    公开(公告)日：2014-04-15

    申请号：US13029309

    申请日：2011-02-17

    Applicant: Elizabeth A. Benham ,  Max P. McDaniel ,  Kathy S. Collins ,  Stephen M. Wharry

    Inventor： Elizabeth A. Benham ,  Max P. McDaniel ,  Kathy S. Collins ,  Stephen M. Wharry

    IPC: B01J21/00 ,  B01J23/00 ,  C08F110/02 ,  C08F4/24

    CPC classification number: C08F10/02 ,  C08F110/02 ,  C08F4/69 ,  C08F4/24 ,  C08F2500/10 ,  C08F2500/08 ,  C08F2500/12

    Abstract: A method comprising (a) contacting a support and a chromium-containing compound to form chromium-containing support, (b) heat treating the chromium-containing support in an oxidizing atmosphere to form a treated support, (c) contacting the treated support with carbon monoxide to form a CO-contacted support, and (d) contacting the CO-contacted support with hydrogen to form a catalyst. A method comprising oxidizing a chromium-treated support to form a polymerization catalyst, contacting the polymerization catalyst with carbon monoxide to form a reduced polymerization catalyst, contacting the reduced polymerization catalyst with hydrogen to form an activated polymerization catalyst, and contacting the activated polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form a random copolymer. A method comprising reducing a polymerization catalyst comprising Cr(VI) to form a polymerization catalyst comprising Cr(II), and treating the polymerization catalyst comprising Cr(II) with hydrogen.

    Abstract translation: 一种方法，包括（a）使载体和含铬化合物接触以形成含铬载体，（b）在氧化气氛中热处理含铬载体以形成经处理的载体，（c）使经处理的载体与 一氧化碳以形成CO-接触的载体，和（d）使CO-接触的载体与氢接触以形成催化剂。 一种方法，包括氧化铬处理的载体以形成聚合催化剂，使聚合催化剂与一氧化碳接触以形成还原的聚合催化剂，使还原的聚合催化剂与氢接触以形成活化的聚合催化剂，并使活化的聚合催化剂与 乙烯在合适的反应条件下在反应区中形成无规共聚物。 一种包括还原包含Cr（VI）的聚合催化剂以形成包含Cr（II）的聚合催化剂并用氢气处理包含Cr（II）的聚合催化剂的方法。

    SYSTEM AND METHOD FOR CATALYST ACTIVATION
    7.
    发明申请
    SYSTEM AND METHOD FOR CATALYST ACTIVATION 有权
    催化剂活化的系统和方法

    公开(公告)号：US20110201768A1

    公开(公告)日：2011-08-18

    申请号：US12706559

    申请日：2010-02-16

    Applicant: Elizabeth A. Benham ,  Max P. McDaniel

    Inventor： Elizabeth A. Benham ,  Max P. McDaniel

    IPC: C08F4/69 ,  B01J23/26 ,  G05D7/00

    CPC classification number: B01J37/08 ,  B01J23/26 ,  B01J37/14 ,  C08F10/00 ,  C08F4/24

    Abstract: A system and method for activating chromium catalyst, including: increasing temperature of a chromium catalyst at a first rate for a first period of time to a first temperature; and increasing temperature of the chromium catalyst at a second rate for a second period of time from the first temperature to a second temperature, wherein the first rate is greater than the second rate, and wherein the first period precedes the second period.

    Abstract translation: 一种用于活化铬催化剂的体系和方法，包括：将第一时间段的铬催化剂的温度升至第一温度; 以及以第二速率将铬催化剂的温度从第一温度升至第二温度第二时间段，其中第一速率大于第二速率，并且其中第一时段在第二周期之前。

Patent Agency Ranking