公开(公告)号：US20070012028A1

公开(公告)日：2007-01-18

申请号：US11179372

申请日：2005-07-12

申请人： Walter Weissman ,  El Mekki El Malki

发明人： Walter Weissman ,  El Mekki El Malki

IPC分类号： F01N3/00

CPC分类号： F01N3/0814 ,  F01N3/035 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/106 ,  F01N13/009 ,  F01N2240/40 ,  F01N2510/0684 ,  F01N2570/04 ,  F01N2610/04

摘要： The present invention relates to an improved exhaust gas cleaning system and method for a combustion source comprising a hydrogen generation system, a sulfur oxides trap, and a nitrogen storage reduction (NSR) catalyst trap. The improved exhaust gas cleaning system and method of the present invention also provides for a water-gas-shift catalyst between the sulfur oxides trap and the NSR catalyst trap, and a clean-up catalyst downstream of the NSR catalyst trap. The invention provides also a sulfur trap regenerable at moderate temperatures with rich pulses, rather than at high temperatures. The improved exhaust gas cleaning system of the present invention provides for the sulfur released from the sulfur trap to pass through the nitrogen oxide trap with no or little poisoning of NOx storage and reduction sites, which significantly improves NSR catalyst trap lifetime and performance to meet future emissions standards. The disclosed exhaust gas cleaning systems are suitable for use in internal combustion engines (e.g., diesel, gasoline, CNG) which operate with lean air/fuel ratios over most of the operating period.

摘要翻译： 本发明涉及一种用于燃烧源的改进的废气净化系统和方法，其包括氢气产生系统，硫氧化物捕集器和氮储存还原（NSR）催化剂阱。 本发明的改进的废气净化系统和方法还提供了硫氧化物捕集器和NSR催化剂捕集器之间的水煤气变换催化剂以及NSR催化剂捕集器下游的净化催化剂。 本发明还提供了在中等温度下可富含脉冲而不是在高温下可再生的硫阱。 本发明的改进的废气净化系统提供从硫阱中释放的硫通过氮氧化物捕集器，没有或少量存在和少量的NO x x储存和还原位点，这显着地改善了NSR 催化剂陷阱寿命和性能，以满足未来的排放标准。 所公开的废气清洁系统适用于在大部分操作周期内以稀薄空气/燃料比运行的内燃机（例如柴油，汽油，CNG）。

公开(公告)号：US4518798A

公开(公告)日：1985-05-21

申请号：US428930

申请日：1982-09-30

申请人： George M. Kramer ,  Walter Weissman ,  Herbert C. Brown ,  Rowland Pettit, deceased

发明人： George M. Kramer ,  Walter Weissman ,  Herbert C. Brown ,  Rowland Pettit, deceased

IPC分类号： C07C67/38 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/14 ,  C07C53/122 ,  C07C67/00 ,  C07C69/22 ,  C07C51/145 ,  C07C67/347

CPC分类号： C07C51/14

摘要： Esters or carboxylic acids are prepared from olefins containing at least two carbon atoms by reacting the olefin with carbon monoxide in the presence of:(i) a first complex of a selected Lewis acid with the ester or carboxylic acid, whichever is the reaction product recovered;(ii) a second complex of the Lewis acid with an alcohol, if an ester is being prepared, or with water, if a carboxylic acid is being prepared; and(iii) a metal carbonyl compound containing a Group IB transition metal in the first oxidation state; andby recovering the reaction product(s).The preferred olefin is propylene, the preferred ester to be prepared is methylisobutyrate, the preferred metal is copper and the preferred Lewis acid is boron trifluoride.

摘要翻译： 酯或羧酸由含有至少两个碳原子的烯烃制备，通过使烯烃与一氧化碳在以下存在下反应：（i）选择的路易斯酸与酯或羧酸的第一配合物，以取反应产物为准 ; （ii）如果正在制备酯，则路易斯酸与醇的第二配合物，如果正在制备羧酸，则与水反应; 和（iii）含有第一氧化态的IB族过渡金属的金属羰基化合物; 并通过回收反应产物。 优选的烯烃是丙烯，所制备的优选的酯是甲基异丁酸酯，优选的金属是铜，优选的路易斯酸是三氟化硼。

公开(公告)号：US4244811A

公开(公告)日：1981-01-13

申请号：US927830

申请日：1978-07-25

申请人： Dane C. Grenoble ,  Walter Weissman

发明人： Dane C. Grenoble ,  Walter Weissman

IPC分类号： C01B3/36 ,  C01B3/38 ,  C10G11/04 ,  C10G53/14

CPC分类号： C01B3/386 ,  C01B3/363 ,  C10G11/04 ,  C01B2203/0233 ,  C01B2203/0261 ,  C01B2203/0283 ,  C01B2203/0811 ,  C01B2203/1041 ,  C01B2203/1082 ,  C01B2203/1094 ,  C01B2203/1247 ,  C01B2203/1258 ,  Y02P20/584

摘要： A process is described for the catalytic cracking of a hydrocarbon feedstream involving the use of an acid catalyst comprising a catalytic component selected from the group consisting of oxides of tungsten, niobium and mixtures thereof and tungsten or niobium oxides in combination with one or more additional metal oxides selected from the group consisting of tantalum oxide, hafnium oxide, chromium oxide, titanium oxide and zirconium oxide on supports, wherein (1) the feedstream is catalytically cracked by being contacted with said catalyst at a temperature and for a time (optionally, in combination with H.sub.2 O), sufficient to crack the hydrocarbon yielding a cracked product and a deactivated catalyst and (2) subjecting the deactivated catalyst to gasification conditions consisting of (A) partial oxidative combustion to produce a low BTU gas rich in CO or, (B) the addition of steam to produce a gas rich in H.sub.2, or both, with the recirculation of the decoked catalyst back to the first step.

摘要翻译： 描述了一种涉及使用含有选自钨，铌及其混合物的氧化物的催化剂组分和钨或铌氧化物与一种或多种另外的金属组合的催化剂组分的酸催化剂的烃进料流的催化裂解的方法 在载体上选自氧化钽，氧化铪，氧化铬，氧化钛和氧化锆的氧化物的氧化物，其中（1）通过在所述催化剂的温度和时间（任选地， 与H 2 O组合），足以裂解产生裂化产物和失活催化剂的烃，和（2）使失活的催化剂经历由（A）部分氧化燃烧组成的气化条件以产生富含CO的低BTU气体，（B ）加入蒸汽以产生富含H 2或两者的气体，再次将经过去除的催化剂再循环回到第一步骤。