利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.012 秒)

    Catalyst systems for improved stereoselectivity and broader molecular weight distribution in polymerization of olefins
    3.
    发明授权
    Catalyst systems for improved stereoselectivity and broader molecular weight distribution in polymerization of olefins 有权
    用于烯烃聚合中改进的立体选择性和较宽分子量分布的催化剂体系

    公开(公告)号：US6147024A

    公开(公告)日：2000-11-14

    申请号：US351025

    申请日：1999-07-12

    申请人： Edwar S. Shamshoum ,  David John Rauscher ,  Douglas Alan Burmaster

    发明人： Edwar S. Shamshoum ,  David John Rauscher ,  Douglas Alan Burmaster

    IPC分类号： C08F4/646 ,  C08F4/649 ,  C08F4/658 ,  C08F10/00 ,  B01J101/00 ,  B01J101/10 ,  B01J101/40 ,  B01J101/50

    CPC分类号： C08F10/00 ,  Y02P20/52

    摘要： The present invention provides a catalyst for the polymerization of olefin that exhibits improved selectivity and broader molecular weight distribution in the polymer product. The catalyst is a conventional supported Ziegler-Natta catalyst in combination with a mixture of at least two electron donors, both having the general formula SiR.sub.m (OR').sub.4-m where R is selected from the group consisting of an alkyl group, a cycloalkyl group, an aryl group and a vinyl group; R' is an alkyl group; and m is 0-3, wherein when R is an alkyl group, R may be identical with R'; when m is 0, 1 or 2, the R' groups may be identical or different; and when m is 1, 2 or 3, the R groups may be identical or different. This catalyst produces polypropylene having xylene solubles of 1-7 to 5.1 wt % and a molecular weight distribution of about 10.

    摘要翻译： 本发明提供了一种用于聚合烯烃的催化剂，其在聚合物产品中表现出改进的选择性和较宽的分子量分布。 催化剂是与至少两个电子给体的混合物组合的常规负载的齐格勒 - 纳塔催化剂，两者都具有通式SiRm（OR'）4-m，其中R选自烷基，环烷基 基团，芳基和乙烯基; R'是烷基; 并且m为0-3，其中当R为烷基时，R可以与R'相同; 当m为0,1或2时，R'可以相同或不同; 当m为1,2或3时，R基团可以相同或不同。 该催化剂产生具有1-7至5.1重量％的二甲苯可溶物和约10的分子量分布的聚丙烯。

    Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides
    4.
    发明授权
    Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides 失效
    用于生产用于除去氮氧化物的催化剂的混合氧化物粉末的方法

    公开(公告)号：US5723404A

    公开(公告)日：1998-03-03

    申请号：US649924

    申请日：1996-05-16

    申请人： Kai Butje ,  Jurgen Kischkewitz ,  Rolf Michael Braun ,  Udo Holtmann ,  Peter-Joachim Barenthien

    发明人： Kai Butje ,  Jurgen Kischkewitz ,  Rolf Michael Braun ,  Udo Holtmann ,  Peter-Joachim Barenthien

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J21/06 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30 ,  B01J37/02 ,  B01J101/50

    CPC分类号： B01J21/063 ,  B01D53/8628 ,  B01J37/0236

    摘要： A process for the production of a mixed oxide powder, that contains as chief constituent TiO.sub.2 in the form of anatase and as minor constituents at least one of the catalytically active oxides MoO.sub.3, WO.sub.3 and V.sub.2 O.sub.5, suitable for use as a catalyst for the removal of nitrogen oxides, comprising (a) partially neutralizing a titanium dioxide hydrate suspension containing sulphuric acid with an alkaline liquor to a pH value between about 4.0 and 6.0 at temperatures between about 20.degree. and 100.degree. C., (b) filtering the suspension from (a) to produce a filter cake and intensively washing the filter cake, (c) adding to the filter cake from (b) at least one water-soluble salt of at least one of the metals Mo, W and V in solid or dissolved form, and (d) drying the filter cake from (c) and calcining it at a temperature between about 300.degree. and 750.degree. C.

    摘要翻译： 一种混合氧化物粉末的制造方法，其包含主要成分为锐钛矿形式的TiO 2和作为少量成分的至少一种催化活性氧化物MoO 3，WO 3和V 2 O 5的方法，适合用作除去 氮氧化物，其包含（a）在约20℃至100℃的温度下，将含有碱性液的硫酸的二氧化钛水合物悬浮液部分中和至约4.0至6.0之间的pH值，（b）将（ a）生产滤饼并强烈地洗涤滤饼，（c）从（b）至少一种金属Mo，W和V的至少一种水溶性盐固体或溶解形式的滤饼中加入滤饼 ，（d）将（c）的滤饼干燥，并在约300〜750℃的温度下煅烧。

    Photocatalyst with modified alkyl silicate ester support and process for production thereof
    5.
    发明授权
    Photocatalyst with modified alkyl silicate ester support and process for production thereof 失效
    具有改性的烷基硅酸酯酯载体的光催化剂及其制备方法

    公开(公告)号：US5686372A

    公开(公告)日：1997-11-11

    申请号：US451650

    申请日：1995-05-26

    申请人： Cooper H. Langford ,  Giuseppe P. Lepore ,  Lalchan Persaud

    发明人： Cooper H. Langford ,  Giuseppe P. Lepore ,  Lalchan Persaud

    IPC分类号： B01J21/06 ,  B01J21/08 ,  B01J23/30 ,  B01J31/02 ,  B01J35/00 ,  B01J35/02 ,  B01J37/02 ,  B01J101/42 ,  B01J101/50

    CPC分类号： B01J31/0212 ,  B01J31/0274 ,  B01J35/002 ,  B01J35/004 ,  B01J21/08 ,  B01J37/0209 ,  Y02W10/37

    摘要： A photocatalyst compound comprising a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.3 and mixtures thereof, the photocatalyst compound having been derivatized by reaction with an alcohol compound. The process for producing the photocatalyst compound comprises the steps of: (i) contacting a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.3 and mixtures thereof with an alcohol compound to form a slurry; (ii) maintaining the temperature of the slurry above the boiling point of the slurry to produce a substance having a modified surface consisting essentially of an alkyl silicate ester and esterified photocatalyst; and (iii) subjecting the substance to selective oxidation to oxidize the esterfied photocatalyst thereby producing a photocatalyst compound having a modified surface consisting essentially of an alkyl silicate ester and a photocatalyst substantially free of ester groups. The photocatalyst compound is useful, inter alia, in the treatment of a fluid containing an organic pollutant.

    摘要翻译： 一种光催化剂化合物，其包含与其结合的二氧化硅基载体材料，所述光催化剂选自TiO 2，WO 3及其混合物，所述光催化剂化合物已经通过与醇化合物的反应衍生化。 制备光催化剂化合物的方法包括以下步骤：（i）将结合有光催化剂的二氧化硅基载体材料与选自TiO 2，WO 3的混合物与醇化合物接触以形成浆料; （ii）将浆料的温度保持在浆料沸点之上，以产生具有主要由烷基硅酸酯和酯化的光催化剂组成的改性表面的物质; 和（iii）对物质进行选择性氧化以氧化酯化的光催化剂，从而制备具有基本上由烷基硅酸酯和基本上不含酯基的光催化剂组成的改性表面的光催化剂化合物。 光催化剂化合物尤其用于处理含有机污染物的流体。