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64 条记录 (耗时 0.022 秒)

    Preparation of carboxylic acid anhydrides
    1.
    发明授权
    Preparation of carboxylic acid anhydrides 失效
    羧酸酐的制备

    公开(公告)号：US4002678A

    公开(公告)日：1977-01-11

    申请号：US643208

    申请日：1975-12-22

    申请人： Anthony N. Naglieri ,  Nabil Rizkalla

    发明人： Anthony N. Naglieri ,  Nabil Rizkalla

    IPC分类号： C07C53/00 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C53/12 ,  C07C67/00

    CPC分类号： C07C51/56

    摘要： A carboxylic acid anhydride, such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of an iodide, carbon monoxide and a nickel-chromium catalyst in the presence of a promoter comprising an organo-nitrogen compound or an organo-phosphorus compound wherein the nitrogen and phosphorus are trivalent.

    摘要翻译： 在羰基化方法中由羧酸酯或烃基醚制备羧酸酐，例如乙酸酐，其包括在包含有机氮化合物的促进剂存在下使用碘化物，一氧化碳和镍 - 铬催化剂 或其中氮和磷为三价的有机磷化合物。

    Novel 2-bromoethyl tellurium bromides
    6.
    发明授权
    Novel 2-bromoethyl tellurium bromides 失效
    新型2-溴乙基碲溴化物

    公开(公告)号：US4271090A

    公开(公告)日：1981-06-02

    申请号：US88998

    申请日：1979-10-29

    申请人： Anthony N. Naglieri ,  Nabil Rizkalla

    发明人： Anthony N. Naglieri ,  Nabil Rizkalla

    IPC分类号： C07C395/00 ,  C07C165/00

    CPC分类号： C07C395/00

    摘要： The novel bis (2-bromoethyl) tellurium dibromide and 2-bromoethyl tellurium tribromide are prepared by reacting ethylene with a source of tellurium tetrabromide in an inert, non-basic organic solvent under certain temperature conditions and in the substantial absence of molecular oxygen.

    摘要翻译： 通过乙烯与四溴化碲源在惰性非碱性有机溶剂中，在一定温度条件下，基本上不存在分子氧来制备新型双（2-溴乙基）二溴化碲和2-溴乙基碲三溴化物。

    Method for making a highly selective ethylene oxide catalyst
    8.
    发明授权
    Method for making a highly selective ethylene oxide catalyst 有权
    制备高选择性环氧乙烷催化剂的方法

    公开(公告)号：US08883675B2

    公开(公告)日：2014-11-11

    申请号：US13109668

    申请日：2011-05-17

    申请人： Nabil Rizkalla ,  Andrzej Rokicki

    发明人： Nabil Rizkalla ,  Andrzej Rokicki

    IPC分类号： B01J23/50 ,  B01J23/58 ,  B01J37/02 ,  B01J37/08 ,  C07D301/08 ,  B01J23/66 ,  C07D301/10 ,  B01J23/68 ,  B01J21/04

    CPC分类号： B01J23/688 ,  B01J21/04 ,  B01J23/66 ,  B01J37/0201 ,  B01J37/08 ,  C07D301/08 ,  C07D301/10 ,  Y02P20/52

    摘要： A process for the preparation of a catalyst useful for the vapor phase production of ethylene oxide from ethylene and oxygen comprising providing a catalyst precursor comprising an inert support having a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound disposed thereon; calcining the catalyst precursor to convert the silver in the silver containing compound to metallic silver by heating the catalyst precursor to form a catalyst; and curing the catalyst in an inert gas atmosphere at temperatures of about 250° C. to about 600° C. for a period of about 1 hour to 200 hours.

    摘要翻译： 一种用于制备用于从乙烯和氧气生产环氧乙烷的催化剂的方法，包括提供催化剂前体，其包含具有催化有效量的含银化合物的惰性载体，促进量的含碱金属的化合物 ，和其上设置有过渡金属的化合物的促进量; 煅烧催化剂前体，通过加热催化剂前体以形成催化剂，将含银化合物中的银转化成金属银; 并在约250℃至约600℃的温度下在惰性气体气氛中固化催化剂约1小时至200小时。

    Process for initiating a highly selective ethylene oxide catalyst
    9.
    发明授权
    Process for initiating a highly selective ethylene oxide catalyst 有权
    引发高选择性环氧乙烷催化剂的方法

    公开(公告)号：US08487123B2

    公开(公告)日：2013-07-16

    申请号：US12977549

    申请日：2010-12-23

    申请人： Nabil Rizkalla ,  Norma B. Castagnola ,  Girish Desai

    发明人： Nabil Rizkalla ,  Norma B. Castagnola ,  Girish Desai

    IPC分类号： C07D301/03

    CPC分类号： C07D301/10

    摘要： A start-up process for epoxidation of ethylene is provided. The process includes initiating an epoxidation reaction by reacting a feed gas composition in the presence of an epoxidation catalyst at a first temperature of about 180° C. to about 210° C. The first temperature is increased to a second temperature of about 230° C. to about 290° C., over a time period of about 6 hours to about 50 hours, while simultaneously adding a sufficient concentration of moderator so that the amount of moderator adsorbed on the catalyst after achieving the second temperature is from about 10 to about 50 g/m3 of catalyst. The second temperature is maintained for about 50 hours to about 350 hours, while regulating the feed gas composition to contain about 0.5% to about 25% CO2. The second temperature is decreased to a third temperature, while simultaneously increasing moderator concentration to a level greater than the sufficient concentration.

    摘要翻译： 提供了乙烯环氧化的启动方法。 该方法包括通过在约180℃至约210℃的第一温度下在环氧化催化剂存在下使进料气体组合物反应来引发环氧化反应。将第一温度升至约230℃的第二温度 至约290℃，同时加入约6小时至约50小时的时间，同时加入足够浓度的缓和剂，使得达到第二温度后吸附在催化剂上的缓和剂的量为约10至约 50 g / m3催化剂。 第二温度保持约50小时至约350小时，同时调节进料气体组成以含有约0.5％至约25％的CO 2。 第二温度降低到第三温度，同时将增效剂浓度同时提高至高于足够浓度的水平。

    Process for preparation of a catalyst carrier
    10.
    发明授权
    Process for preparation of a catalyst carrier 失效
    催化剂载体的制备方法

    公开(公告)号：US08318627B2

    公开(公告)日：2012-11-27

    申请号：US11201253

    申请日：2005-08-10

    申请人： Nabil Rizkalla

    发明人： Nabil Rizkalla

    IPC分类号： B01J21/00 ,  B01J23/00 ,  B01J25/00 ,  B01J29/00 ,  B01J31/00 ,  B01J23/08 ,  B01J20/00

    CPC分类号： B01J21/04 ,  B01J23/50 ,  B01J37/0018 ,  C07D301/08 ,  C07D301/10

    摘要： This invention relates to catalyst carriers to be used as supports for metal and metal oxide catalyst components of use in a variety of chemical reactions. More specifically, the invention provides a process of formulating a low surface area alpha alumina carrier that is suitable as a support for silver and the use of such catalyst in chemical reactions, especially the epoxidation of ethylene to ethylene oxide. A precursor for a catalyst support comprises an admixture of an alpha alumina and/or a transition alumina; a binder; and either a solid blowing agent which expands, or propels a gas upon the application of sufficient heat, and optionally contains talc and/or water soluble titanium compound.

    摘要翻译： 本发明涉及用作用于各种化学反应的金属和金属氧化物催化剂组分的载体的催化剂载体。 更具体地说，本发明提供了一种配制低表面积α氧化铝载体的方法，其适合作为银的载体，以及在化学反应中使用这种催化剂，特别是将乙烯环氧化成环氧乙烷。 催化剂载体的前体包含α氧化铝和/或过渡氧化铝的混合物; 粘合剂 以及在施加足够的热量时膨胀或推动气体的固体发泡剂，并且任选地含有滑石和/或水溶性钛化合物。