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95 条记录 (耗时 0.027 秒)

    Method for drying and degassing polyolefins
    1.
    发明授权
    Method for drying and degassing polyolefins 失效
    干燥和脱气聚烯烃的方法

    公开(公告)号：US06465608B1

    公开(公告)日：2002-10-15

    申请号：US09980566

    申请日：2001-11-15

    申请人： Michael Witt ,  Paulus De Lange ,  Thomas Perner ,  Andreas Deckers ,  Kaspar Evertz ,  Dieter Lilge

    发明人： Michael Witt ,  Paulus De Lange ,  Thomas Perner ,  Andreas Deckers ,  Kaspar Evertz ,  Dieter Lilge

    IPC分类号： C08F600

    CPC分类号： C08F6/005 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/13

    摘要： The invention relates to a method for drying and degassing polyolefins in which the polymerization product leaving a polymerization reactor is brought into contact with a degassing medium and simultaneously decompressed. The degassing medium employed according to the invention is the monomer to be polymerized, which, in particular, flows through a decompression tank in a circulation process and which is preferably also enriched with ethylene or other low-boiling olefins in an amount in the range from 0 to 100 mol %, based on the total amount of circulating gas. A polymerization in an amount of up to 10%, based on the total polymerization conversion, takes place in accordance with the invention inside the decompression tank.

    摘要翻译： 本发明涉及一种干燥脱气聚烯烃的方法，其中离开聚合反应器的聚合产物与脱气介质接触并同时减压。 根据本发明使用的脱气介质是待聚合的单体，其特别是在循环过程中流过减压槽，并且其优选还富含乙烯或其它低沸点烯烃，其量为 0〜100摩尔％，基于循环气体的总量。 根据本发明，在减压槽内进行基于总聚合转化率高达10％的聚合。

    Gas phase polymerization method
    3.
    发明授权
    Gas phase polymerization method 失效
    气相聚合法

    公开(公告)号：US06596822B1

    公开(公告)日：2003-07-22

    申请号：US10089749

    申请日：2002-04-02

    申请人： Michael Witt ,  Andreas Deckers ,  Farid Rizk ,  Kaspar Evertz

    发明人： Michael Witt ,  Andreas Deckers ,  Farid Rizk ,  Kaspar Evertz

    IPC分类号： C08F234

    CPC分类号： C08F6/005 ,  B01J8/007 ,  B01J8/10 ,  B01J8/1872 ,  C08F210/16 ,  Y10S526/901 ,  C08L23/00 ,  C08F2/34 ,  C08F2/01 ,  C08F210/14 ,  C08F2500/18 ,  C08F2500/24

    摘要： The invention relates to a method and an apparatus for the polymerization of gaseous olefins, in particular of ethylene and at least one &agr;-olefin, in the gas phase in a stirred or fluidized, catalyst-containing polymerization zone (2) and at least one decompression zone (6, 10) downstream of the polymerization zone (2). The mixture of solid (co)polymer and unreacted monomers leaving the polymerization zone (2) flows through a settling zone, in particular in the form of a settling leg (14), before the decompression zone.

    摘要翻译： 本发明涉及用于在搅拌或流化的含催化剂的聚合区（2）中的气相中气态烯烃，特别是乙烯和至少一种α-烯烃的聚合的方法和装置，以及至少一种 在聚合区（2）下游的减压区（6,10）。 离开聚合区（2）的固体（共）聚合物和未反应单体的混合物在减压区之前流过沉降区，特别是沉降腿（14）的形式。

    Method for producing supported chrome catalysts and the use thereof for the polymerization of olefins
    4.
    发明授权
    Method for producing supported chrome catalysts and the use thereof for the polymerization of olefins 有权
    负载型铬催化剂的制备方法及其在烯烃聚合中的应用

    公开(公告)号：US06608151B1

    公开(公告)日：2003-08-19

    申请号：US10070341

    申请日：2002-02-28

    申请人： Paulus de Lange ,  Guido Funk ,  Andreas Deckers ,  Peter Kölle

    发明人： Paulus de Lange ,  Guido Funk ,  Andreas Deckers ,  Peter Kölle

    IPC分类号： C08F424

    CPC分类号： C08F10/02 ,  B01J23/26 ,  B01J37/0203 ,  C08F210/16 ,  C08F4/24 ,  C08F4/025 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/13

    摘要： The invention relates to a method for producing supported chromium catalysts for the polymerisation of olefins by loading a xerogel support with chromium by adding to the xerogel support a volume of a 0.025 to 15% by weight solution of a chromium compound or a volume of a solution comprising from 0.025 to 7.8% by weight of Cr which is essentially converted into a chromium(VI) compound on heating in a water-free stream of gas under oxidizing conditions at temperatures in the range from 300 to 1100° C. for a period of from 10 to 1000 minutes in a solvent which comprises a maximum of 20% by weight of water, and subsequently evaporating the solvent, where the volume of the chromium salt solution employed is smaller than the pore volume of the xerogel support.

    摘要翻译： 本发明涉及通过向干凝胶载体中加入0.025至15重量％的铬化合物或一定体积的溶液的体积来生产用于使烯烃聚合的负载型铬催化剂的方法， 包括0.025至7.8重量％的Cr，其在氧化条件下在300至1100℃的温度范围内在无水气体流中加热，基本上转化为铬（VI）化合物一段时间 在包含最多20重量％的水的溶剂中10至1000分钟，然后蒸发溶剂，其中所用的铬盐溶液的体积小于干凝胶载体的孔体积。

    Optimized method for the production of catalyst supports based on silica gel and chromium catalysts supported on silica gel
    5.
    发明授权
    Optimized method for the production of catalyst supports based on silica gel and chromium catalysts supported on silica gel 有权
    基于硅胶和载于硅胶上的铬催化剂生产催化剂载体的优化方法

    公开(公告)号：US06645900B2

    公开(公告)日：2003-11-11

    申请号：US10087012

    申请日：2002-02-28

    申请人： Paulus de Lange ,  Guido Funk ,  Andreas Deckers ,  Peter Kölle

    发明人： Paulus de Lange ,  Guido Funk ,  Andreas Deckers ,  Peter Kölle

    IPC分类号： B01J29035

    CPC分类号： C08F10/00 ,  B01J21/08 ,  B01J37/0072 ,  B01J37/036 ,  C08F4/02 ,  C08F4/24

    摘要： The invention relates to a catalyst support and to a method for the production of the catalyst support comprising the following steps: a) production of a silicic acid hydrogel having a solids content of from 10 to 25% by weight (calculated as SiO2) whose particles are substantially spherical, b) extraction of the hydrogel particles with an alcohol until at least 60% of the water present in the hydrogel has been removed, c) drying of the resultant hydrogel until the residual alcohol content is less than 10% by weight (xerogel formation) at temperatures of ≧160° C. at atmospheric pressure using an inert entraining gas, d) setting of the desired particle size of the resultant xerogel, in which the hydrogel particles have a particle size of ≧8 mm before the extraction, and to a catalyst and to a method for the production of the catalyst by loading the catalyst support with a chromium compound. The invention also relates to a method for the production of polyolefins using the catalyst.

    摘要翻译： 本发明涉及一种催化剂载体和用于生产催化剂载体的方法，包括以下步骤：a）制备固体含量为10至25重量％（以SiO 2计）的硅酸水凝胶，其颗粒 基本上是球形的，b）用醇萃取水凝胶颗粒，直到水凝胶中存在的至少60％的水已被除去，c）干燥所得的水凝胶，直到残余的醇含量低于10重量％ 干燥剂形成），在大气压下使用惰性夹带气体，在大气压力= 160℃的温度下，d）设定所得干燥剂的所需粒度，其中水凝胶颗粒的颗粒尺寸> 萃取和催化剂的制备方法，以及通过用铬化合物负载催化剂载体来生产催化剂的方法。 本发明还涉及使用该催化剂生产聚烯烃的方法。

    High mixture-quality bi-modal polyethylene blends
    6.
    发明授权
    High mixture-quality bi-modal polyethylene blends 失效
    高混合质量的双模聚乙烯混合物

    公开(公告)号：US06545093B1

    公开(公告)日：2003-04-08

    申请号：US09806584

    申请日：2001-04-02

    申请人： Paulus de Lange ,  Andreas Deckers ,  Thomas Kessler ,  Wolfgang Rohde ,  Thomas Blümel ,  Martin Lux

    发明人： Paulus de Lange ,  Andreas Deckers ,  Thomas Kessler ,  Wolfgang Rohde ,  Thomas Blümel ,  Martin Lux

    IPC分类号： C08L2304

    CPC分类号： C08L23/0815 ,  C08L23/12 ,  C08L2205/02 ,  C08L2314/02 ,  C08L2666/04

    摘要： Bimodal polyethylene blends are made from a high-molecular-weight ethylene copolymer and a low-molecular-weight ethylene homo- or copolymer and have a melt flow rate MFR 190/21.6 of from 6 to 14 g/10 min, a density of from 0.94 to 0.97 g/cm3, an environmental-stress-cracking resistance ESCR>150 h and a value of less than 3 when the quality of blending in the blend is measured to ISO 13949. A process prepares polyethylene blends of this type by melting and homogenization in a mixing apparatus and discharge via a gear pump. The blends are used to produce moldings, in particular hollow articles and pressure pipes.

    摘要翻译： 双峰聚乙烯共混物由高分子量乙烯共聚物和低分子量乙烯均聚物或共聚物制成，熔体流动速率MFR 190 / 21.6为6至14g / 10min，密度为 0.94〜0.97g / cm 3，环境耐应力开裂性ESCR> 150h，当共混物的共混质量测定为ISO 13949时，其值小于3。一种方法通过熔融和 在混合装置中均匀化并通过齿轮泵排出。 混合物用于生产模制品，特别是中空制品和压力管。

    Method for producing an ethylene copolymer
    7.
    发明授权
    Method for producing an ethylene copolymer 失效
    乙烯共聚物的制造方法

    公开(公告)号：US06586540B1

    公开(公告)日：2003-07-01

    申请号：US09889607

    申请日：2001-07-19

    申请人： Paulus De Lange ,  Volker Billert ,  Bernd Brunner ,  Werner Ritter ,  Andreas Deckers

    发明人： Paulus De Lange ,  Volker Billert ,  Bernd Brunner ,  Werner Ritter ,  Andreas Deckers

    IPC分类号： C08F21016

    CPC分类号： C08F210/16 ,  C08F2/002 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/07 ,  C08F210/08

    摘要： The invention relates to a method for the production of copolymer based on ethylene by continuous copolymerization of ethylene and comonomer in a reactor in the presence of a catalyst. In this method, in a first step of the copolymerization, a mixture comprising ethylene and comonomer of such a composition that a copolymer-containing coating deposits in the reactor is metered into the reactor and/or generated in the reactor, and, in a second step, the concentration of the comonomer in the metered-in mixture and/or in the mixture generated in the reactor is reduced sufficiently and/or the concentration of the ethylene in the metered-in mixture and/or in the mixture generated in the reactor is increased sufficiently that the coating is removed from the reactor either partially or completely. The method has the advantage that the production of copolymer does not have to be interrupted during cleaning of the reactor.

    摘要翻译： 本发明涉及在反应器中在催化剂存在下通过乙烯和共聚单体的连续共聚制备基于乙烯的共聚物的方法。 在该方法中，在共聚的第一步骤中，将含有共聚物的涂层沉积在反应器中的组合物的乙烯和共聚单体的混合物计量加入反应器和/或在反应器中产生，并且在第二步中 步骤中，在计量混合物中和/或在反应器中产生的混合物中的共聚单体的浓度被充分降低和/或在计量混合物中和/或在反应器中产生的混合物中的乙烯浓度 充分增加，使得涂层部分或完全从反应器中除去。 该方法的优点在于，在反应器的清洗期间不必中断共聚物的制备。

    Method for carrying out radical ethylene high-pressure polymerization while preventing undesired polymer deposits
    8.
    发明授权
    Method for carrying out radical ethylene high-pressure polymerization while preventing undesired polymer deposits 有权
    进行自由基乙烯高压聚合同时防止不期望的聚合物沉积物的方法

    公开(公告)号：US06562915B2

    公开(公告)日：2003-05-13

    申请号：US10182563

    申请日：2002-07-31

    申请人： Frank-Olaf Mähling ,  Andreas Deckers ,  Dieter Littmann ,  Heinz Friedrich Sutoris ,  Kaspar Evertz

    发明人： Frank-Olaf Mähling ,  Andreas Deckers ,  Dieter Littmann ,  Heinz Friedrich Sutoris ,  Kaspar Evertz

    IPC分类号： C08F240

    CPC分类号： C08F297/08 ,  C08F110/02 ,  C08F2/40 ,  C08F2/00 ,  C08F4/34 ,  C08F2/005 ,  C08F2500/26

    摘要： In a process for the polymerization or copolymerization of ethylenically unsaturated monomers in the presence of polymerization initiators which decompose to form free radicals in a continuously operated polymerization apparatus comprising a fresh gas feed line, a precompressor, a postcompressor, a reactor, a pressure maintenance valve, a high-pressure circuit having a high-pressure product separator and a high-pressure circulation gas return line, a product valve and a low-pressure circuit having a low-pressure product separator and a low-pressure circulation gas return line, nitrogen monoxide or oxygen is introduced as inhibitor into the high-pressure circuit, into the low-pressure circuit and/or the precompressor.

    摘要翻译： 在用于在连续操作的聚合装置中分解形成自由基的聚合引发剂存在下烯键式不饱和单体的聚合或共聚的方法中，所述聚合引发剂包括新鲜气体进料管线，预压缩机，后压缩机，反应器，压力维持阀 具有高压产品分离器和高压循环气体返回管路的高压回路，具有低压产品分离器和低压循环气体返回管路的产品阀和低压回路，氮气 将一氧化碳或氧气作为抑制剂引入高压回路中，进入低压回路和/或预压缩机。