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330 条记录 (耗时 0.033 秒)

    Method for seed bed treatment before a polymerization reaction
    31.
    发明申请
    Method for seed bed treatment before a polymerization reaction 审中-公开
    聚合反应前种子床处理方法

    公开(公告)号：US20070073012A1

    公开(公告)日：2007-03-29

    申请号：US11236998

    申请日：2005-09-28

    申请人： Richard Pannell ,  Agapios Agapiou ,  Eric Markel

    发明人： Richard Pannell ,  Agapios Agapiou ,  Eric Markel

    IPC分类号： C08F2/00

    CPC分类号： C08F10/00 ,  Y02P20/582 ,  C08F2/34 ,  C08F2/005

    摘要： In some embodiments, a method in which at least one continuity additive (“CA”) and a seed bed are pre-loaded into a reactor, and a polymerization reaction is optionally then performed in the reactor. In other embodiments, at least one flow improver, at least one CA, and a seed bed are pre-loaded into a reactor. Pre-loading of a reactor with a CA can significantly improve continuity of a subsequent polymerization reaction in the reactor during its initial stages, including by reducing sheeting and fouling. The CA can be pre-loaded in dry form (e.g., as a powder), or in liquid or slurry form (e.g., as an oil slurry). To aid delivery of a dry CA to the reactor and combination of the dry CA with a seed bed in the reactor, the dry CA can be combined with a flow improver and the combination of CA and flow improver then loaded into the reactor. Alternatively, the CA and flow improver can be sequentially loaded into the reactor, and then mixed together (and mixed with a seed bed) in the reactor after both the CA and flow improver have been separately loaded into the reactor.

    摘要翻译： 在一些实施方案中，将至少一种连续性添加剂（“CA”）和种子床预加载到反应器中的方法，然后任选地在反应器中进行聚合反应。 在其它实施方案中，将至少一种流动改进剂，至少一种CA和种子床预加载到反应器中。 具有CA的反应器的预装载可以显着改善反应器在其初始阶段期间的后续聚合反应的连续性，包括通过减少薄片和结垢。 CA可以预干燥形式（例如，作为粉末），或以液体或浆液形式（例如，作为油浆）预加载。 为了帮助将干燥的CA输送到反应器中，并且干燥的CA与反应器中的种子床的组合，干燥的CA可与流动改进剂组合，然后将CA和流动改进剂的组合装入反应器中。 或者，CA和流动改进剂可以顺序地加载到反应器中，然后在CA和流动改进剂已经分别装载到反应器中之后混合在一起（并与种子床混合）在反应器中。

    Scale deposit inhibitor, process for its production, polymerizer whose inside wall is covered with the inhibitor, and process for production of vinylic polymers by the use of the polymerizer
    35.
    发明授权
    Scale deposit inhibitor, process for its production, polymerizer whose inside wall is covered with the inhibitor, and process for production of vinylic polymers by the use of the polymerizer 失效
    鳞屑沉积抑制剂，其生产方法，其内壁被抑制剂覆盖的聚合反应器，以及通过使用聚合反应器生产乙烯基聚合物的方法

    公开(公告)号：US06894125B2

    公开(公告)日：2005-05-17

    申请号：US10467807

    申请日：2001-12-12

    申请人： Kunio Kamata ,  Kazuhiko Kanawa ,  Kikuo Yamamoto

    发明人： Kunio Kamata ,  Kazuhiko Kanawa ,  Kikuo Yamamoto

    IPC分类号： C08F2/00 ,  C08F2/04

    CPC分类号： C08F2/005 ,  C08F2/002

    摘要： A scale adhesion preventing agent for use in a polymerization reactor, consisting essentially of a condensate of a phenol represented by the following formula (1), a 1-naphthol and an aldehyde, which is soluble in an alkaline aqueous solution: wherein R1 and R2 are the same or different and each a hydroxyl group, alkyl group having 1 to 8 carbon atoms, halogen atom, hydrogen atom, alkoxycarbonyl group whose alkyl moiety has 1 to 8 carbon atoms or phenyl group, with the proviso that a hydrogen atom is existent at at least two of ortho-positions and para-positions with respect to the hydroxyl group. When a vinyl-based monomer is to be polymerized using a polymerization reactor having a film of this scale adhesion preventing agent on the inner wall, the vinyl-based polymer can be produced by preventing the adhesion of a scale.

    摘要翻译： 用于聚合反应器中的鳞片粘附防止剂，其基本上由下式（1）表示的苯酚的缩合物，1-萘酚和醛组成，其可溶于碱性水溶液：其中R 1和R 2相同或不同，并且每个羟基，具有1至8个碳原子的烷基，卤素原子，氢原子，烷基部分具有1至 8个碳原子或苯基，条件是相对于羟基在至少两个邻位和对位存在氢原子。 当使用具有该鳞片粘附防止剂的膜的聚合反应器在乙烯基类单体聚合时，可以通过防止水垢附着而制备乙烯基类聚合物。

    Polymer scale deposition preventive agent
    37.
    发明申请
    Polymer scale deposition preventive agent 失效

    公开(公告)号：US20050032990A1

    公开(公告)日：2005-02-10

    申请号：US10912102

    申请日：2004-08-06

    申请人： Mikio Watanabe ,  Tadashi Amano

    发明人： Mikio Watanabe ,  Tadashi Amano

    IPC分类号： C08L1/26 ,  C08F2/00 ,  C08F14/00 ,  C08L61/06

    CPC分类号： C08F2/00 ,  C08F2/005

    摘要： Provided is a polymer scale deposition-preventive agent. It includes (A) a condensation reaction product of an aldehyde compound and a hydroxynaphthalene compound and (B) a soluble methoxyl group-substituted cellulose ether. The agent is formed into a film having an adequate polymer scale deposition-preventive property in a single-step application. The time for the application process is shortened to improve productivity. Polymer scales can be prevented from adhering to the inner wall surfaces of the polymerization vessel even if a plenty number of batches for polymerization are repeated.

    Process of producing &agr;-olefin polymers
    40.
    发明授权
    Process of producing &agr;-olefin polymers 有权
    生产α-烯烃聚合物的方法

    公开(公告)号：US06689846B1

    公开(公告)日：2004-02-10

    申请号：US09959651

    申请日：2001-11-02

    申请人： Pauli Leskinen ,  Kauno Alastalo

    发明人： Pauli Leskinen ,  Kauno Alastalo

    IPC分类号： C08F238

    CPC分类号： C08F297/08 ,  C08F2/005 ,  C08F210/06 ,  C08F210/16 ,  C08F2410/05 ,  C08F2/001 ,  C08F2500/12 ,  C08F2/42

    摘要： The present invention relates to a process for polymerizing &agr;-olefins in at least two stages, the first stage comprising at least one bulk reactor and optionally at least one gas phase reactor for forming the &agr;-olefin polymer matrix and the second stage comprising at least one additional gas phase reactor for copolymerization of ethylene with said polymer matrix. In the second stage an antifouling composition is fed into said gas phase reactor(s) for preventing fouling in the second stage.

    摘要翻译： 本发明涉及在至少两个阶段中聚合α-烯烃的方法，第一阶段包括至少一个本体反应器和任选的至少一个用于形成α-烯烃聚合物基质的气相反应器，第二阶段至少包括 一个用于使乙烯与所述聚合物基质共聚的另外的气相反应器。 在第二阶段中，将防污组合物进料到所述气相反应器中以防止第二阶段的结垢。