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公开(公告)号：US5788936A
公开(公告)日：1998-08-04
申请号：US917261
申请日：1992-07-23
CPC分类号： F01N3/2066 , B01D53/9459 , B01J21/04 , F01N13/009 , B01D2251/208 , B01D2251/21 , B01D2255/1023 , B01D53/9418 , B01D53/944 , F01N2610/03 , Y02T10/24
摘要： A catalyst system for attaining high conversions of NO, HC, and CO in a fuel-lean emission flow (i.e., containing SO.sub.2, H.sub.2 O, H.sub.2, and considerable excess oxygen), the system comprising: (a) a first stage reducing catalyst for treating the nitric oxide emissions, the catalyst containing highly acidic gamma alumina (i.e., with a pH.sub.pzc of less than 3); (b) means for injecting gaseous or liquid reductants into the emission stream prior to entering said first stage catalyst, said first stage catalyst temperature being selected to be in the range of 550.degree.-650.degree. C.; and (c) an oxidation catalyst effective for treating the effluent from the first stage catalyst. Another aspect of this invention is a method of treating the exhaust gas from a fuel-lean emission flow from a fossil-fueled internal combustion engine having a redox ratio of 0.02-0.09, the method comprising: (a) injecting a gaseous or liquid HC or oxygenated HC reductant into the emission stream at a location where the stream is within the temperature range of 550.degree.-650.degree. C.; (b) immediately exposing the injected stream to a first stage catalyst containing acidic gamma alumina with a Ph.sub.pzc of less than 3; and (c) exposing the effluent from the first stage catalyst to an oxidation catalyst that is effective in ensuring that the NO, HC, and CO in the emissions are each converted to at least 80%.
摘要翻译： 一种用于在贫燃料流（即含有SO 2，H 2 O，H 2和相当多的氧）中获得NO，HC和CO的高转化率的催化剂体系，所述系统包括：（a）第一级还原催化剂 处理一氧化氮排放，含有高酸性γ氧化铝的催化剂（即pHpzc小于3）; （b）用于在进入所述第一级催化剂之前将气态或液态还原剂注入所述排放流中的装置，所述第一级催化剂温度选择在550-650℃范围内。 和（c）有效处理来自第一级催化剂的流出物的氧化催化剂。 本发明的另一方面是一种从具有0.02-0.09的氧化还原比的化石燃料内燃机的来自贫燃料的排放流中处理废气的方法，所述方法包括：（a）将气态或液态HC 或氧化的HC还原剂进入流在550-650℃的温度范围内的排放流中。 （b）将注射的流体立即暴露于含有Phpzc小于3的酸性γ氧化铝的第一级催化剂; 和（c）将来自第一阶段催化剂的流出物暴露于有效确保排放物中的NO，HC和CO各自转化为至少80％的氧化催化剂。
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公开(公告)号：US5766562A
公开(公告)日：1998-06-16
申请号：US814068
申请日：1997-03-10
CPC分类号： B01D53/945 , B01J23/40 , Y02T10/22
摘要： The invention is a method for treating exhaust gases generated by a diesel engine by providing a sulfur-tolerant lean-NOx catalyst in an exhaust gas passage of the engine and contacting the catalyst with the exhaust gases. The sulfur-tolerant lean-NOx catalyst comprises a support of titania aerogel; and loaded thereon, using impregnation techniques from a solution of their precursors, at least 0.25 weight percent precious metal selected from platinum, palladium, rhodium, or mixtures thereof. The method converts the hydrocarbons, carbon monoxide and nitrogen oxides into more desirable gases. In particular, the NOx is converted to N.sub.2 and O.sub.2 over the catalyst.
摘要翻译： 本发明是一种通过在发动机的排气通道中提供耐硫稀土氧化物催化剂并使催化剂与废气接触来处理由柴油发动机产生的废气的方法。 耐硫稀土氧化物催化剂包括二氧化钛气凝胶的载体; 并使用浸渍技术从其前体溶液中加入至少0.25重量％的选自铂，钯，铑或其混合物的贵金属。 该方法将烃，一氧化碳和氮氧化物转化成更理想的气体。 特别地，NOx在催化剂上转化为N 2和O 2。
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公开(公告)号：US5328672A
公开(公告)日：1994-07-12
申请号：US874315
申请日：1992-04-27
IPC分类号： B01D53/86 , B01D53/94 , B01J29/072 , B01J29/10 , B01D47/00 , B01J8/02 , C01B21/00 , C01B31/18
CPC分类号： B01D53/945 , B01J29/072 , Y02T10/22
摘要： A dual-phase zeolite having a transition metal-containing zeolite phase and a transition metal-containing oxide phase. The catalytic material may be an intimate mixture of a phase-layered structure of a first phase constituted preferably of a copper-containing high silica zeolite and a second phase constituted of copper-containing zirconia.Methods are also disclosed for making a single-stage catalyst for removing NO.sub.x and HC at high efficiency in an oxygen-rich automotive exhaust gas, and for treating the exhaust gas with the dual-phase catalyst above.
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公开(公告)号：US5208205A
公开(公告)日：1993-05-04
申请号：US772410
申请日：1991-10-07
CPC分类号： F01N3/2066 , B01D53/9459 , B01J21/04 , F01N13/009 , B01D2251/208 , B01D2251/21 , B01D2255/1023 , B01D53/9418 , B01D53/944 , F01N2610/03 , Y02T10/24
摘要： A catalyst system for attaining high conversions of NO, HC, and CO in a fuel-lean emission flow (i.e., containing SO.sub.2, H.sub.2 O, H.sub.2, and considerable excess oxygen), the system comprising: (a) a first stage reducing catalyst for treating the nitric oxide emissions, the catalyst containing highly acidic gamma alumina (i.e., with a pH.sub.pzc of less than 3); (b) means for injecting gaseous or liquid reductants into the emission stream prior to entering said first stage catalyst, said first stage catalyst temperature being selected to be in the range of 550.degree.-650.degree. C.; and (c) an oxidation catalyst effective for treating the effluent from the first stage catalyst.Another aspect of this invention is a method of treating the exhaust gas from a fuel-lean emission flow from a fossil-fueled internal combustion engine having a redox ratio of 0.02-0.09, the method comprising: (a) injecting a gaseous or liquid HC or oxygenated HC reductant into the emission stream at a location where the stream is within the temperature range of 550.degree.-650.degree. C.; (b) immediately exposing the injected stream to a first stage catalyst containing acidic gamma alumina with a pH.sub.pzc of less than 3; and (c) exposing the effluent from the first stage catalyst to an oxidation catalyst that is effective in ensuring that the NO, HC, and CO in the emissions are each converted to at least 80%.
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5.发明授权Three-way catalyst for treating emissions from compressed natural gas fueled engines 失效用于处理压缩天然气燃油发动机排放的三元催化剂
公开(公告)号：US5208204A
公开(公告)日：1993-05-04
申请号：US772318
申请日：1991-10-07
IPC分类号： B01D53/94 , B01J23/63 , B01J23/652 , B01J37/02
CPC分类号： B01D53/945 , B01J23/63 , B01J23/652 , B01J37/0205 , Y02T10/22
摘要： A three-way catalyst system for treating the exhaust stream of a compressed natural gas (CNG) fueled engine operating slightly rich of stoichiometry, the said catalyst system providing high conversions and low light-off temperature for the removal of HC, CO, and NO.sub.x. A high surface area gamma alumina support is impregnated with an intimate mixture of 0.2-30% Pd and 0.5-20% La.sub.2 O.sub.3, the Pd being in crystalline form with particle size in the range of 5-500 angstroms.A method of making such catalyst system comprising sequentially impregnating a high surface area gamma alumina support with lanthana and palladium by incipient wetness techniques, such techniques comprising the procedure of contacting alumina first with a lanthanum nitrate solution of desired concentration to obtain 0.5-20% lanthana, contacting the lanthana impregnated alumina with a palladium nitrate solution of desired concentration to obtain a 0.2-30% palladium content in the catalyst, each of said steps being separated by drying and calcination.A method of treating exhaust gas from a CNG fueled engine with the catalyst system described above, comprising: (a) operating said engine at slightly rich of stoichiometry; (b) exposing such catalyst to the exhaust gases in the range of 400.degree.-750.degree. C. and at a space velocity in the range of 0-100K hr.sup.-1, said exhaust gas being converted at an efficiency greater than 90% for each of NO, CO, and CH.sub.4.
摘要翻译： 一种用于处理压缩天然气（CNG）燃料发动机的排气流的三元催化剂系统，该发动机运行略微浓度化学计量，所述催化剂体系提供高转化率和低的熄灭温度以除去HC，CO和NOx 。 用0.2-30％Pd和0.5-20％La2O3的紧密混合物浸渍高表面积γ氧化铝载体，Pd为粒度在5-500埃范围内的结晶形式。 一种制备这种催化剂体系的方法，其包括通过初始润湿技术顺序地将高表面积γ氧化铝载体浸渍到镧和钯中，这种技术包括使氧化铝首先与所需浓度的硝酸镧溶液接触以获得0.5-20％的氧化镧 使所述浸渍了氧化镧的氧化铝与所需浓度的硝酸钯溶液接触以在催化剂中获得0.2-30％的钯含量，每个步骤通过干燥和煅烧分离。 一种利用上述催化剂系统处理来自CNG燃料发动机的废气的方法，包括：（a）以稍浓的化学计量运行所述发动机; （b）将这种催化剂暴露于400℃-750℃范围内的废气中，并且在0-100Khr -1的空间速度下，所述废气以大于90％的效率转化为 每个NO，CO和CH4。
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6.发明授权Thermosettable powder compositions of polymaleimide and allyl-functional prepolymer 失效聚马来酰亚胺和烯丙基官能预聚物的可热熔粉末组合物
公开(公告)号：US5183865A
公开(公告)日：1993-02-02
申请号：US642103
申请日：1991-01-16
申请人： Mohinder S. Chattha
发明人： Mohinder S. Chattha
IPC分类号： C08F290/14
CPC分类号： C08F290/14 , Y10S525/934
摘要： This invention is directed to a shelf-stable, powder composition adapted to form a high T.sub.g, thermally stable, impact resistant thermoset material. The composition consists essentially of a mixture of an allyl-functional prepolymer component and polymaleimide component. The allyl-functional prepolymer component is the reaction product of an aromatic allyl-functional compound and a modifying compound wherein the compounds contain mutually reactive funtionalities such as an aromatic allyl-functional epoxide compound and a modifying amine compound.
摘要翻译： 本发明涉及适于形成高Tg，热稳定，耐冲击的热固性材料的货架稳定的粉末组合物。 该组合物基本上由烯丙基官能预聚物组分和聚马来酰亚胺组分的混合物组成。 烯丙基官能预聚物组分是芳族烯丙基官能化合物和其中所述化合物包含相互反应活性的改性化合物的反应产物，例如芳族烯丙基官能化环氧化合物和改性胺化合物。
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7.发明授权Corrosion inhibiting aqueous compositions comprising metal-chelating diphenolamine compounds 失效包含金属螯合二酚胺化合物的腐蚀抑制含水组合物
公开(公告)号：US4830680A
公开(公告)日：1989-05-16
申请号：US129813
申请日：1987-12-07
IPC分类号： C23F11/14
CPC分类号： C23F11/142 , C23F11/141
摘要： This invention relates to an aqueous composition useful to deposit a corrosion inhibiting and adhesion promoting coating on a corrodible metal substrate and a method for doing same. The composition has a pH of between about 2 and about 10 and comprises water-soluble or water-dispersible metal-chelating diphenolamine compounds.
摘要翻译： 本发明涉及一种用于在腐蚀性金属基材上沉积腐蚀抑制和附着力的涂层的水性组合物及其制备方法。 该组合物的pH为约2至约10，并且包含水溶性或水分散性金属螯合二酚胺化合物。
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公开(公告)号：US4808441A
公开(公告)日：1989-02-28
申请号：US50126
申请日：1987-05-15
IPC分类号： B05D7/14 , B05D5/00 , B05D7/24 , B32B15/092 , C08G59/50 , C08G59/58 , C09D163/00 , B05D3/02 , B32B15/08 , B32B27/38 , F01N7/16
CPC分类号： C08G59/5033 , C08G59/504 , C08G59/58 , C09D163/00 , Y10T428/31529
摘要： This invention is directed to the use of particularly defined epoxy-amine compositions as a protective coating on metals which are exposed to a high temperature, corrosive environment. The metal may be that employed in motor vehicle exhaust system components, such as mufflers and tailpipes. The epoxy-amine compositions comprises epoxy resin component, aromatic amine component, optionally, acid component selected from polycarboxylic acid and anhydrides thereof and optionally, polyol component.
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9.发明授权Metal-chelating diphenolamine oligomers for corrosion inhibition of metal substrates 失效用于金属底物腐蚀抑制的金属螯合二酚胺低聚物
公开(公告)号：US4770727A
公开(公告)日：1988-09-13
申请号：US129814
申请日：1987-12-07
IPC分类号： C23C22/83 , C23F11/173 , C23C22/82
CPC分类号： C23C22/83 , C23F11/173
摘要： This invention relates to a water-soluble or water-dispersible diphenolamine oligomeric metal-chelating compound, method for making same, aqueous composition comprising the compound useful to deposit a corrosion preventive and adhesion promoting coating on a metal substrate and a method for doing same. The composition has a pH of between about 2 and about 10.
摘要翻译： 本发明涉及一种水溶性或水分散性二酚胺低聚金属螯合化合物及其制备方法，含有可用于在金属基材上沉积防腐蚀和附着促进涂层的化合物的水性组合物及其制备方法。 组合物的pH为约2至约10。
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10.发明授权
公开(公告)号：US4480069A
公开(公告)日：1984-10-30
申请号：US465856
申请日：1983-01-05
CPC分类号： C08F2/08
摘要： Crosslinked, preferably acrylic, polymer particles characterized in that the particles formed by free radical addition polymerization of:(a) between about 0.8 and about 20 weight percent each of first and second ethylenically saturated monomers each bearing functionality capable of crosslinking reaction with the other; and(b) between about 98.4 and about 60 weight percent of at least one other monoethylenically unsaturated monomer;in the presence of (I) an organic liquid which is a solvent for the polymerizable monomers, but a non-solvent for the resultant polymer, and (II) polymeric dispersion stabilizer containing at least two segments with one segment being solvated by the organic liquid and the second segment being of different polarity than the first segment and relatively insoluble in the organic liquid, wherein the reaction is carried out at elevated temperatures such that the dispersion polymer forms and then is crosslinked, wherein the percursor of the first segment of the stabilizer comprises a long chain hydrocarbon molecule having only one reactive group per molecule.
摘要翻译： PCT No.PCT / US83 / 00014 Sec。 371日期1983年1月5日 102（e）1983年1月5日的PCT日期1983年1月5日。交联的，优选丙烯酸的聚合物颗粒，其特征在于通过自由基加成聚合形成的颗粒：（a）各自为约0.8至约20重量％ 的第一和第二烯属饱和单体，每个具有能够与另一个交联反应的官能团; 和（b）约98.4-约60重量％的至少一种其它单烯属不饱和单体; 在（I）作为可聚合单体的溶剂的有机液体的存在下，但是用于所得聚合物的非溶剂的存在下，和（II）含有至少两个具有一个链段的片段的聚合物分散稳定剂由有机液体溶剂化 并且所述第二段具有与所述第一段不同的极性并且相对不溶于所述有机液体，其中所述反应在升高的温度下进行，使得所述分散体聚合物形成然后交联，其中所述稳定剂的第一区段的所述粘度 包括每分子仅具有一个反应性基团的长链烃分子。
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