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288 条记录 (耗时 0.05 秒)

    Treatment of metathesis catalysts for olefins in a vibratory helicoidal conveyor
    33.
    发明授权
    Treatment of metathesis catalysts for olefins in a vibratory helicoidal conveyor 失效
    在振动螺旋输送机中处理烯烃的复分解催化剂

    公开(公告)号：US06265501B1

    公开(公告)日：2001-07-24

    申请号：US09339109

    申请日：1999-06-24

    申请人： Dominique Commereuc ,  Hélène Olivier ,  Lucien Saussine

    发明人： Dominique Commereuc ,  Hélène Olivier ,  Lucien Saussine

    IPC分类号： C08F234

    CPC分类号： B01J38/12 ,  B01J38/04 ,  C07C6/04 ,  Y02P20/584 ,  Y10S526/901

    摘要： A process for treatment of metathesis catalysts for olefins comprises sending the particles of catalysts through at least one vibratory helicoidal conveyor, subject the particles over at least a portion of their path and preferably over a large portion of their path to a temperature profile, and bringing the particles into contact with at least one fluid over at least a portion of their path. A vibratory helicoidal lifting device (12) makes it possible to regenerate metathesis catalysts for olefins: it comprises a combustion zone (14) and a calcination zone (15), as well as a preheating zone, a zone for stripping hydrocarbons and a zone for cooling the catalyst.

    摘要翻译： 用于处理烯烃的复分解催化剂的方法包括将催化剂颗粒通过至少一个振动螺旋输送机送出，使颗粒在它们的路径的至少一部分上，优选地在其路径的大部分上达到温度分布，并使 颗粒在其路径的至少一部分上与至少一种流体接触。 振动螺旋提升装置（12）使得可以再生用于烯烃的复分解催化剂：其包括燃烧区（14）和煅烧区（15），以及预热区，用于汽提烃的区和 冷却催化剂。

    Process and apparatus for fluid bed polymerization
    34.
    发明授权
    Process and apparatus for fluid bed polymerization 失效
    流化床聚合的工艺和装置

    公开(公告)号：US06262190B1

    公开(公告)日：2001-07-17

    申请号：US09247414

    申请日：1999-02-10

    申请人： William Helmer Joyce

    发明人： William Helmer Joyce

    IPC分类号： C08F234

    CPC分类号： B01J8/1809 ,  B01J8/0005 ,  B01J8/44 ,  B01J2208/00256 ,  B01J2208/00274 ,  B01J2208/00539 ,  B01J2208/00548 ,  B01J2208/0061 ,  B01J2219/185 ,  B01J2219/1943 ,  C08F2/34 ,  C08F10/00 ,  C08F2410/05 ,  Y10S526/901

    摘要： In gas phase fluid bed polymerization processes, operation can be achieved over wider ranges of fluidizing gas velocities without incurring undue energy costs by adjusting the pressure drop through the grid below the bed to provide a ratio of pressure drop through the grid to pressure drop through the grid and bed above about 0.15:1. The range of fluidizing gas velocities can enhance the practicality of operating the processes over varying bed heights while reducing the risk of forming deposits of polymer. The processes of the invention are particularly useful to accommodate start-ups, catalyst transitions and shutdowns.

    摘要翻译： 在气相流化床聚合方法中，可以在更宽范围的流化气体速度下实现操作，而不会通过调节通过床下方的网格的压降而引起不必要的能量成本，以提供通过网格的压降与通过 格栅和床高于约0.15：1。 流化气体速度的范围可以提高在不同床高下操作过程的实用性，同时降低形成聚合物沉积物的风险。 本发明的方法对于适应初始化，催化剂转换和停机特别有用。

    Procatalyst and process for the preparation of a multimodal ethylene polymer
    36.
    发明授权
    Procatalyst and process for the preparation of a multimodal ethylene polymer 失效
    用于制备多峰乙烯聚合物的主催化剂和方法

    公开(公告)号：US06225420B1

    公开(公告)日：2001-05-01

    申请号：US09093765

    申请日：1998-06-09

    申请人： Ulf Palmqvist ,  Solveig Johansson ,  Lars Thorn ,  Peter Idelmann ,  Anders Wahlström ,  Daniel Lindgren

    发明人： Ulf Palmqvist ,  Solveig Johansson ,  Lars Thorn ,  Peter Idelmann ,  Anders Wahlström ,  Daniel Lindgren

    IPC分类号： C08F234

    CPC分类号： C08F297/08 ,  C08F10/00 ,  C08F210/16 ,  Y10S526/901 ,  C08F4/6555 ,  C08F2/001 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/18 ,  C08F2500/24

    摘要： A procatalyst and a process for the preparation of a multimodal ethylene homopolymer or copolymer by gas-phase polymerisation is described. The procatalyst used in the process is prepared by: a) contacting the support, preferably silica with a halogenating agent, preferably ethyl aluminium dichloride to obtain a first reaction product, b) contacting the first reaction product with a compound or mixture containing hydrocarbyl and one or more of hydrocarbyloxy, monoalkylamido, dialkylamido, carboxylato and alkoxymethoxy groups linked to magnesium, thereby to obtain a second reaction product (the procatalyst precursor), and c) contacting the second reaction product with a titanium compound, preferably TiCl4. In step a) the molar ratio of the alkyl metal chloride to the surface hydroxyls of the inorganic oxide is preferably between 1:1 and 10:1. In step b) the atomic ratio of the magnesium to the chlorine of the alkyl metal chloride of step a) preferably is between 1:1.5 to 1:2.5. In step c) the atomic ratio of magnesium of step b) to titanium preferably is between 1.4 and 5.

    摘要翻译： 描述了主催化剂和通过气相聚合制备多峰乙烯均聚物或共聚物的方法。 该方法中使用的主催化剂是通过以下步骤制备的：a）将载体，优选二氧化硅与卤化剂，优选二氯化乙基铝接触，得到第一反应产物，b）使第一反应产物与含有烃基和一个 或多个与镁连接的烃氧基，单烷基酰氨基，二烷基酰氨基，羧基和烷氧基甲氧基，从而得到第二反应产物（前催化剂前体），和c）使第二反应产物与钛化合物，优选TiCl 4接触。 在步骤a）中，烷基金属氯化物与无机氧化物的表面羟基的摩尔比优选在1:1至10:1之间。 在步骤b）中，步骤a）的烷基金属氯化物的镁与氯的原子比优选在1:1.5至1:2.5之间。 在步骤c）中，步骤b）的镁与钛的原子比优选为1.4〜5。

    Polymerisation process
    37.
    发明授权
    Polymerisation process 有权
    聚合过程

    公开(公告)号：US06187878B1

    公开(公告)日：2001-02-13

    申请号：US09471419

    申请日：1999-12-23

    申请人： Claudine Viviane Lalanne-Magne ,  Erick Dominique Daire ,  Bruno Patrice Soulier ,  Jean-Pierre Isnard

    发明人： Claudine Viviane Lalanne-Magne ,  Erick Dominique Daire ,  Bruno Patrice Soulier ,  Jean-Pierre Isnard

    IPC分类号： C08F234

    CPC分类号： C08F10/00 ,  Y10S526/901 ,  C08F2/34

    摘要： A continuous gas fluidized bed process for the polymerization of olefin monomer(s) wherein the recycled gaseous stream withdrawn from the reactor is divided into two streams (A and B) and that (a) a first stream (A) having been cooled to a temperature at which liquid condenses out is then reintroduced directly into the fluidized bed in the reactor in such a way that, at any time, the condensed liquid is continuously introduced into the bed at a minimum rate of 10 liters of liquid per cubic meter of fluidized bed material per hour, and (b) a second stream (B), which by-passes the above cooling/condensing step, is passed through an exchanger and is then reintroduced into the reactor. The continuous introduction of a liquid into the reactor reduces or even eliminates fouling problems which can be encountered in conventional gas phase olefin polymerization processes.

    摘要翻译： 用于烯烃单体聚合的连续气体流化床方法，其中从反应器中排出的循环气流被分成两股流（A和B），和（a）已冷却至 液体冷凝出的温度然后直接重新引入反应器中的流化床，使得在任何时候，冷凝的液体以每立方米流化床10升液体的最小速率连续引入床中 每小时的床料，和（b）通过上述冷却/冷凝步骤的第二料流（B）通过交换器，然后再被引入反应器。 将液体连续引入反应器减少或甚至消除了在常规气相烯烃聚合方法中可能遇到的结垢问题。

    Crosslinked polymers
    38.
    发明授权
    Crosslinked polymers 失效
    交联聚合物

    公开(公告)号：US5932674A

    公开(公告)日：1999-08-03

    申请号：US875535

    申请日：1997-07-30

    申请人： Beat Muller

    发明人： Beat Muller

    IPC分类号： G02C7/04 ,  B29D11/00 ,  C07C233/18 ,  C07C233/20 ,  C07C237/22 ,  C07C323/52 ,  C07D207/27 ,  C07D207/452 ,  C07D521/00 ,  C08F8/00 ,  C08F216/38 ,  C08F299/00 ,  C08G18/81 ,  C08J3/24 ,  G02B1/04 ,  C08F234/02 ,  C08F220/58

    CPC分类号： G02B1/043 ,  C08F8/00 ,  C08F8/28 ,  C08F8/30 ,  C08F2810/20 ,  C08F2810/30

    摘要： The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a soluble prepolymer comprising units containing a crosslinkable group and at least one unit containing a modifier is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel prepolymers which can be employed in the novel process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 which comprises from about 0.5 to about 80%, based on the number of hydroxyl groups in the polyvinyl alcohol, of units of the formulae I and II, II and III or I, II and III, as disclosed in detail in the description, and to crosslinked polymers, either homopolymers or copolymers, made from these novel prepolymers, a process for the preparation of the novel prepolymers and the homopolymers and copolymers obtainable therefrom, to mouldings made from said homopolymers or copolymers, in particular contact lenses made from these homopolymers or copolymers, and to a process for the production of contact lenses using said homopolymers or copolymers.

    摘要翻译： PCT No.PCT / EP96 / 00245 Sec。 371日期1997年7月30日 102（e）日期1997年7月30日PCT 1996年1月22日PCT PCT。 出版物WO96 / 24074 日期1996年8月8日本发明涉及一种用于生产模制品，特别是隐形眼镜的新型方法，其中包含含有可交联基团的单元的可溶性预聚物和至少一种含有改性剂的单元在溶液中交联， ，特别是可通过该方法获得的隐形眼镜。 本发明同样涉及可用于新方法中的新型预聚物，特别是分子量至少为约2000的聚乙烯醇的衍生物，其包含基于羟基数的约0.5至约80％ 在聚乙烯醇中，如说明书中详细公开的式I和II，II和III或I，II和III的单元，以及由这些新型预聚物制成的交联聚合物，均聚物或共聚物， 用于制备新型预聚物及其可获得的均聚物和共聚物，由所述均聚物或共聚物制成的模制品，特别是由这些均聚物或共聚物制成的隐形眼镜，以及使用所述均聚物或共聚物制备隐形眼镜的方法 。