公开(公告)号：US5138093A

公开(公告)日：1992-08-11

申请号：US654662

申请日：1976-02-05

申请人： Nabil Rizkalla ,  Charles N. Winnick

发明人： Nabil Rizkalla ,  Charles N. Winnick

IPC分类号： C07C45/49

CPC分类号： C07C45/49 ,  Y02P20/582

摘要： Ethylidene diacetate is prepared by treating at least one member of the group consisting of methyl acetate and dimethyl ether with carbon monoxide in the presence of a source of halide under substantially anhydrous conditions.

摘要翻译： 亚乙基二乙酸酯通过在基本无水条件下在卤化物源存在下用一氧化碳处理至少一种由乙酸甲酯和二甲醚组成的组分来制备。

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。

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。

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。

公开(公告)号：US07763096B2

公开(公告)日：2010-07-27

申请号：US12115779

申请日：2008-05-06

申请人： Nabil Rizkalla ,  Andrzej Rokicki

发明人： Nabil Rizkalla ,  Andrzej Rokicki

IPC分类号： C22B11/00

CPC分类号： C22B3/1625 ,  C01G47/00 ,  C22B7/006 ,  C22B7/009 ,  C22B11/048 ,  C22B61/00 ,  Y02P10/214 ,  Y02P10/234

摘要： The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.

摘要翻译： 本发明涉及从固体载体上含有铼和至少银的环氧乙烷催化剂中回收铼的方法，其中存在于催化剂中的至少大部分铼通过催化剂与一种或多种催化剂的紧密接触来提取， 更极性的非酸性有机溶剂基本上不含水，从而形成含有极性非酸性有机溶剂和萃取的铼的含铼溶液，所述极性非酸性有机溶剂含有一个或多个氧，氮和/或 卤素原子在其分子结构中。

公开(公告)号：US20090277305A1

公开(公告)日：2009-11-12

申请号：US12115779

申请日：2008-05-06

申请人： Nabil Rizkalla ,  Andrzej Rokicki

发明人： Nabil Rizkalla ,  Andrzej Rokicki

IPC分类号： C22B61/00 ,  C07D303/02

CPC分类号： C22B3/1625 ,  C01G47/00 ,  C22B7/006 ,  C22B7/009 ,  C22B11/048 ,  C22B61/00 ,  Y02P10/214 ,  Y02P10/234

摘要： The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.

摘要翻译： 本发明涉及从固体载体上含有铼和至少银的环氧乙烷催化剂中回收铼的方法，其中存在于催化剂中的至少大部分铼通过催化剂与一种或多种催化剂的紧密接触来提取， 更极性的非酸性有机溶剂基本上不含水，从而形成含有极性非酸性有机溶剂和萃取的铼的含铼溶液，所述极性非酸性有机溶剂含有一个或多个氧，氮和/或 卤素原子在其分子结构中。

公开(公告)号：US07553980B2

公开(公告)日：2009-06-30

申请号：US11861736

申请日：2007-09-26

申请人： Nabil Rizkalla ,  Barry Jay Billig ,  Norma B. Castagnola

发明人： Nabil Rizkalla ,  Barry Jay Billig ,  Norma B. Castagnola

IPC分类号： C07D301/10

CPC分类号： C07D301/10 ,  Y02P20/52

摘要： A process for initiating a highly selective ethylene oxide catalyst is provided in which the highly selective ethylene oxide catalyst is operated first as a ‘standard’ Ag-based catalyst (e.g., a catalyst that contains only silver and alkali metal, especially cesium). Moreover, the inventive initiation procedure is more efficient when the concentration of carbon dioxide in the feed is higher than 6 vol. %, and even more efficient when the concentration of carbon dioxide in the feed is higher than 10 vol. %, of the feed mixture during the initiation period.

摘要翻译： 提供了一种引发高选择性环氧乙烷催化剂的方法，其中高选择性环氧乙烷催化剂首先作为“标准”Ag基催化剂（例如仅含有银和碱金属，特别是铯的催化剂）。 此外，当进料中二氧化碳的浓度高于6体积时，本发明的引发程序更有效。 ％，并且当进料中二氧化碳的浓度高于10体积时甚至更有效。 ％的进料混合物。

公开(公告)号：US20070037991A1

公开(公告)日：2007-02-15

申请号：US11201030

申请日：2005-08-10

申请人： Nabil Rizkalla

发明人： Nabil Rizkalla

IPC分类号： B01J21/00 ,  C07D301/06

CPC分类号： B01J21/04 ,  B01J23/50 ,  B01J23/66 ,  B01J35/023 ,  B01J35/1009 ,  B01J35/1038 ,  B01J35/1042 ,  B01J37/0009 ,  B01J37/0018 ,  B01J37/0203 ,  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 an 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. The composition comprises at least one hydrated precursor of alpha alumina; an optional alpha alumina; and a binder. The composition is substantially free of seeding particles.

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，本发明提供了一种配制适合作为银的载体的α氧化铝载体和在化学反应中使用这种催化剂的方法，特别是将乙烯环氧化成环氧乙烷。 该组合物包含至少一种α氧化铝的水合前体; 可选的α氧化铝; 和粘合剂。 组合物基本上不含接种颗粒。

公开(公告)号：US06939979B2

公开(公告)日：2005-09-06

申请号：US10714378

申请日：2003-11-10

申请人： Nabil Rizkalla ,  Vijay S. Bhise

发明人： Nabil Rizkalla ,  Vijay S. Bhise

IPC分类号： C07D301/10

CPC分类号： C07D301/10

摘要： Ethylene is oxidized by contact at oxidizing conditions with an admixture of a solid particulate catalyst and a solid particulate alkali metal treated inert.

摘要翻译： 在固体颗粒催化剂和惰性固体颗粒状碱金属的混合物的氧化条件下，乙烯被氧化。

公开(公告)号：US5504052A

公开(公告)日：1996-04-02

申请号：US348340

申请日：1994-12-02

申请人： Nabil Rizkalla ,  William Armstrong

发明人： Nabil Rizkalla ,  William Armstrong

IPC分类号： B01J23/50 ,  B01J23/66 ,  B01J37/02 ,  B01J37/08 ,  B01J37/16 ,  C07D301/10

CPC分类号： B01J37/0203 ,  B01J23/50 ,  B01J23/66 ,  B01J37/086 ,  C07D301/10 ,  Y02P20/52

摘要： A silver catalyst for ethylene oxidation to ethylene oxide is prepared by impregnating an inert support with a silver/amine solution and calcining the impregnated support at 300.degree.-5000.degree. C., the catalyst being maintained under an inert atmosphere at temperatures of 250.degree. C. or higher, preferably at 100.degree. C. or higher.

摘要翻译： 通过用银/胺溶液浸渍惰性载体并在300-5000℃煅烧浸渍的载体来制备用于乙烯氧化成环氧乙烷的银催化剂，将催化剂在惰性气氛下在250℃的温度下保持 以上，优选为100℃以上。