公开(公告)号：US4222236A

公开(公告)日：1980-09-16

申请号：US916953

申请日：1978-06-19

申请人： Louis Hegedus ,  Se H. Oh ,  Kenneth Baron

发明人： Louis Hegedus ,  Se H. Oh ,  Kenneth Baron

IPC分类号： F01N3/18 ,  F02B75/02 ,  F02M1/00 ,  F02M1/10 ,  F01N3/10

CPC分类号： F02M1/00 ,  F01N3/18 ,  F02M1/10 ,  F02B2075/027

摘要： A method for decreasing CO and HC emissions in a vehicle exhaust stream during the period of engine warm-up following the start of engine operation, in which the A/F mixture to the engine is pulsed by first using a mixture which is leaner than that otherwise used thus reducing the CO and HC content of the exhaust stream exiting the engine to an amount below that of the CO and HC otherwise present and then using an A/F mixture which is richer than such lean mixture and is substantially that otherwise used thus increasing the amount of CO and HC in the vehicle exhaust stream to substantially the amount otherwise present, passing the pulsed exhaust stream through a catalytic converter adapted to oxidize the CO and HC constituents, and repeating this pulsing continuously through the period of engine warm-up and at a rate sufficient to achieve increased catalytic conversion of CO and HC over that obtained without pulsing, the rate being also sufficiently rapid so as to preclude engine-stall. A preferred system for practicing the method involves apparatus for the repeated opening of the choke plate of the engine carburetor during the period when the choke plate is not full-open.

摘要翻译： 一种用于在发动机运转开始之后的发动机预热期间减少车辆废气流中的CO和HC排放的方法，其中通过首先使用比发动机运行更精细的混合物将发动机的A / F混合物脉冲 否则使用，因此将离开发动机的废气流的CO和HC含量降低到低于CO和HC的CO的量，然后使用比这种稀混合物更丰富的A / F混合物，并且基本上由此另外使用 将车辆排气流中的CO和HC的量增加到基本上以其他​​方式存在的量，使脉冲排气流通过适于氧化CO和HC成分的催化转化器，并在发动机预热期间连续地重复该脉冲 并且以足以实现比没有脉冲的获得的CO和HC的增加的催化转化的速率，速率也足够快以便排除发动机失速 。 用于实施该方法的优选系统涉及在扼流板未完全打开的期间重复打开发动机化油器的阻风板的装置。

公开(公告)号：US5137855A

公开(公告)日：1992-08-11

申请号：US410762

申请日：1989-09-21

申请人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

发明人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

IPC分类号： B01D53/86 ,  B01J21/06 ,  B01J35/10

CPC分类号： B01J21/063 ,  B01D53/8628 ,  B01J35/0026 ,  B01J35/023 ,  B01J35/10 ,  B01J35/1014 ,  B01J35/1038 ,  B01J35/1066 ,  B01J37/0009

摘要： Catalysts for the selective catalytic reduction of NOx by ammonia are made from porous formed supports having a certain fraction of the pores with pore diameters larger than 600 Angstrom units. Thus macropores can be introduced in a formed TiO.sub.2 support by adding burnout materials prior to forming the titania into the formed support. Then conventional DeNOx catalytic metals are added. Barium sulfate can be added to the surface of the porous inorganic oxide to make an improved support.

摘要翻译： 用于由氨选择性催化还原NOx的催化剂由具有孔径大于600埃单位的孔的一定部分的多孔成形载体制成。 因此，在将二氧化钛形成到形成的载体之前，通过添加烧制材料，可以在形成的TiO 2载体中引入大孔。 然后加入常规的DeNOx催化金属。 可以将硫酸钡加入到多孔无机氧化物的表面以形成改进的载体。

公开(公告)号：US4929586A

公开(公告)日：1990-05-29

申请号：US204641

申请日：1988-06-09

申请人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

发明人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

IPC分类号： B01D53/94 ,  B01D53/86 ,  B01J21/06 ,  B01J23/14 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30 ,  B01J23/34 ,  B01J23/74 ,  B01J23/745 ,  B01J35/10

CPC分类号： B01J21/063 ,  B01D53/8628 ,  B01J21/06 ,  B01J35/10 ,  B01J35/1014 ,  B01J35/1019 ,  B01J35/1042 ,  B01J35/1061 ,  B01J35/1066 ,  B01J35/1071 ,  B01J35/109 ,  Y02C20/10

摘要： Catalysts for the selective catalytic reduction of NOx by ammonia are made from porous formed supports having a certain fraction of the pores with pore diameters larger than 600 Angstrom units. Thus macropores can be introduced in a formed TiO.sub.2 support by adding burnout materials or some inorganic oxide prior to forming the titania into the formed support. Alternatively, titania is precipitated onto a porous inorganic oxide such as SiO.sub.2, Al.sub.2 O.sub.3, ZrO.sub.2, AlPO.sub.4, Fe.sub.2 O.sub.3 and B.sub.2 O.sub.3 to form the support. Then conventional DeNOx catalytic metals are added. The support can be made by first impregnating the inorganic oxide particles with titania via a soluble precursor, forming titania and then shaping the coated particles into the desired shape such as a monolith. In a second embodiment, the inorganic oxide particles are first formed into the desired shape and then impregnated with the titania forming material. Barium sulfate can be added to the surface of the porous inorganic oxide to made an improved support.

公开(公告)号：US4859433A

公开(公告)日：1989-08-22

申请号：US198810

申请日：1988-05-25

申请人： Carmo J. Pereira ,  Joseph E. Kubsh ,  Louis Hegedus

发明人： Carmo J. Pereira ,  Joseph E. Kubsh ,  Louis Hegedus

IPC分类号： B01D53/94 ,  B01J21/04 ,  B01J35/10 ,  B01J37/02

CPC分类号： B01D53/945 ,  B01J21/04 ,  B01J35/023 ,  B01J35/1019 ,  B01J35/1042 ,  B01J35/1047 ,  B01J35/1061 ,  B01J37/024 ,  Y02T10/22

摘要： An optimum washcoated ceramic monolith for treating automotive exhaust gases is made by(a) specifying the reactants, process conditions and desired time on stream;(b) determining from the parameters in step (a) the pore size distribution and thickness of the washcoat to produce the desired auto exhaust conversion;(c) preparing a washcoat catalyst with an alumina having the desired pore size distribution; and(d) applying the prepared washcoat catalyst to a ceramic or metal monolith to produce a finished automotive exhaust gas catalyst.Following this process the optimized washcoated catalyst can then be used to treat automotive exhaust gases.

摘要翻译： 通过（a）指定反应物，工艺条件和所需的流动时间，制备用于处理汽车废气的最佳洗涂陶瓷整料。 （b）根据步骤（a）中的参数确定修补基面涂层的孔径分布和厚度以产生所需的汽车排气转化; （c）用具有所需孔径分布的氧化铝制备修补基面涂层催化剂; 和（d）将制备的修补基面涂层催化剂施加到陶瓷或金属整料以产生成品汽车废气催化剂。 在该过程之后，可以使用优化的涂布的催化剂来处理汽车废气。

公开(公告)号：US4541996A

公开(公告)日：1985-09-17

申请号：US670192

申请日：1984-11-13

申请人： Carmo J. Pereira ,  Louis Hegedus ,  James M. Maselli

发明人： Carmo J. Pereira ,  Louis Hegedus ,  James M. Maselli

IPC分类号： B01D53/94 ,  B01J23/40 ,  B01J35/02 ,  B01D53/36

CPC分类号： B01D53/945 ,  B01D53/9454 ,  B01J23/40 ,  B01J35/026 ,  Y02T10/22 ,  Y10S423/13

摘要： An extrudate catalyst suitable for auto emission control is made from a solid, transitional alumina. It has a partially hollow interior and one or more platinum group metals deposited on the extrudate. The cylindrical extrudate has internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This configuration permits the catalyst to have the large geometric surface area per reactor volume yet, because of the openings inside the extrudate, the catalyst particles do not exhibit a large pressure drop when packed in a deep bed. These catalysts provide greater hydrocarbon and carbon monoxide conversions than do similar size spherical particles and they have improved light-off characteristics.

摘要翻译： 适用于自动排放控制的挤出物催化剂由固体过渡氧化铝制成。 它具有部分中空的内部和沉积在挤出物上的一个或多个铂族金属。 圆柱形挤出物具有从挤出物颗粒的内壁延伸到中心的内部增强叶片或肋。 该配置允许催化剂具有每个反应器体积大的几何表面积，由于挤出物内部的开口，催化剂颗粒在包装在深床中时不会表现出大的压降。 与类似尺寸的球形颗粒相比，这些催化剂提供更大的烃和一氧化碳转化率，并且它们具有改进的起燃特性。

公开(公告)号：US4510262A

公开(公告)日：1985-04-09

申请号：US542440

申请日：1983-10-17

申请人： Gwan Kim ,  Carmo J. Pereira ,  Louis Hegedus ,  James M. Maselli

发明人： Gwan Kim ,  Carmo J. Pereira ,  Louis Hegedus ,  James M. Maselli

IPC分类号： B01D53/94 ,  B01J23/656 ,  B01J35/02 ,  B01J35/10 ,  F01N3/28 ,  B01J21/04 ,  B01J23/10 ,  B01J23/58 ,  B01J35/04

CPC分类号： B01D53/945 ,  B01D53/9454 ,  B01J23/6562 ,  B01J35/0026 ,  B01J35/023 ,  B01J35/026 ,  B01J35/08 ,  B01J35/10 ,  B01J35/1014 ,  B01J35/1019 ,  B01J35/1038 ,  B01J35/1042 ,  B01J37/0009 ,  F01N3/2828 ,  Y02T10/22

摘要： An extrudate catalyst suitable for auto emission control is made from a solid, transitional aluminia with a partially hollow interior. Deposited on the extrudate are two promoters, ceria and an alkali metal, and one or more platinum group metals. The preferred alkali metal is in the oxide form as lithia. The cylindrical extrudate has internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This configuration permits the catalyst to have the large geometric surface area per reactor volume yet, because of the openings inside the extrudate, the catalyst particles do not exhibit a large pressure drop when packed in a deep bed. These catalysts provide greater hydrocarbon and carbon monoxide conversions than do similar size spherical particles and they have improved light-off characteristics.

摘要翻译： 适用于自动排放控制的挤出物催化剂由具有部分中空内部的固体，过渡性铝铝制成。 沉积在挤出物上的是两种促进剂，二氧化铈和碱金属，以及一种或多种铂族金属。 优选的碱金属是氧化物形式的锂化合物。 圆柱形挤出物具有从挤出物颗粒的内壁延伸到中心的内部增强叶片或肋。 该配置允许催化剂具有每个反应器体积大的几何表面积，由于挤出物内部的开口，催化剂颗粒在包装在深床中时不会表现出大的压降。 与类似尺寸的球形颗粒相比，这些催化剂提供更大的烃和一氧化碳转化率，并且它们具有改进的起燃特性。

公开(公告)号：US4153579A

公开(公告)日：1979-05-08

申请号：US875616

申请日：1978-02-06

申请人： Jack C. Summers ,  Louis Hegedus

发明人： Jack C. Summers ,  Louis Hegedus

IPC分类号： B01D53/94 ,  B01J23/46 ,  B01J37/02 ,  B01J21/04 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44

CPC分类号： B01D53/945 ,  B01J23/464 ,  B01J37/024 ,  Y02T10/22

摘要： A three-way layered catalyst for use in a stoichiometric air/fuel ratio system comprising an alumina support having deposited thereon the catalyst materials platinum, palladium and rhodium and having a first layer of platinum positioned at the support surface, a second layer of catalyst material selected from the group consisting of rhodium and a mixture of palladium and rhodium adjacent to and radially inward of the first layer with palladium inward of and adjacent to said second layer where the catalyst material of such layer is rhodium. Cerium oxide may be added to the support for improved performance.

摘要翻译： 一种用于化学计量空气/燃料比体系的三元层状催化剂，其包含在其上沉积有催化剂材料铂，钯和铑并且具有位于支撑表面的第一铂层的氧化铝载体，第二层催化剂材料 选自铑和与第一层相邻且径向向内的钯和铑的混合物，其中钯层向内并邻近所述第二层，其中该层的催化剂材料为铑。 可以将氧化铈加入到载体中以改善性能。

公开(公告)号：US4771029A

公开(公告)日：1988-09-13

申请号：US52103

申请日：1987-05-18

申请人： Carmo J. Pereira ,  Joseph E. Kubsh ,  Louis Hegedus

发明人： Carmo J. Pereira ,  Joseph E. Kubsh ,  Louis Hegedus

IPC分类号： B01D53/94 ,  B01J21/04 ,  B01J23/40 ,  B01J35/10 ,  B01J37/02 ,  B01J32/00

CPC分类号： B01D53/945 ,  B01J21/04 ,  B01J35/1019 ,  B01J35/1042 ,  B01J35/1047 ,  B01J35/1061 ,  B01J37/024 ,  Y02T10/22

摘要： An optimum washcoated ceramic monolith for treating automotive exhaust gases is made by(a) specifying the reactants, process conditions and desired time on stream;(b) determining from the parameters in step (a) the pore size distribution and thickness of the washcoat to produce the desired auto exhaust conversion;(c) preparing a washcoat catalyst with an alumina having the desired pore size distribution; and(d) applying the prepared washcoat catalyst to a ceramic or metal monolith to produce a finished automotive exhaust gas catalyst. Following this process the optimized washcoated catalyst can then be used to treat automotive exhaust gases.

摘要翻译： 通过（a）指定反应物，工艺条件和所需的流动时间，制备用于处理汽车废气的最佳洗涂陶瓷整料。 （b）根据步骤（a）中的参数确定修补基面涂层的孔径分布和厚度以产生所需的汽车排气转化; （c）用具有所需孔径分布的氧化铝制备修补基面涂层催化剂; 和（d）将制备的修补基面涂层催化剂施加到陶瓷或金属整料以产生成品汽车废气催化剂。 在该过程之后，可以使用优化的涂布的催化剂来处理汽车废气。

公开(公告)号：US4510263A

公开(公告)日：1985-04-09

申请号：US542363

申请日：1983-10-17

申请人： Carmo J. Pereira ,  Louis Hegedus

发明人： Carmo J. Pereira ,  Louis Hegedus

IPC分类号： C07B31/00 ,  B01J21/04 ,  B01J23/74 ,  B01J23/88 ,  B01J35/02 ,  C07C67/00 ,  C10G45/08 ,  B01J23/85 ,  B01J35/00

CPC分类号： B01J35/026 ,  C10G45/08

摘要： An extrudate suitable for improved gas/liquid contacting is made from a solid, transitional alumina. The cylindrical extrudate has a partially hollow interior and internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This extrudate configuration permits the extrudate to have the large geometric surface area per reactor volume yet, because of the openings inside the extrudate, the particles do not exhibit a large pressure drop when packed in a deep bed. One or more Group VI and Group VIII metals can be impregnated to form a catalyst which provides superior desulfurization and demetallization activity than do similar size particles.

摘要翻译： 适合于改善气体/液体接触的挤出物由固体过渡氧化铝制成。 圆柱形挤出物具有部分中空的内部和从内壁延伸到挤出物颗粒的中心的内部加强叶片或肋。 这种挤出物构造允许挤出物具有每个反应器体积的大的几何表面积，但是由于挤出物内部的开口，当包装在深床中时，颗粒不会表现出大的压降。 可以将一种或多种VI族和VIII族金属浸渍以形成与类似尺寸的颗粒相比提供优异的脱硫和脱金属活性的催化剂。

公开(公告)号：US4329844A

公开(公告)日：1982-05-18

申请号：US150309

申请日：1980-05-16

申请人： Farhang Shadman ,  Louis Hegedus

发明人： Farhang Shadman ,  Louis Hegedus

IPC分类号： F01N3/021 ,  F01N3/023 ,  F02B3/06 ,  F01N3/02

CPC分类号： F01N3/0234 ,  F01N3/021 ,  F01N3/023 ,  F01N2240/02 ,  F01N2330/10 ,  F01N2430/06 ,  F01N2470/18 ,  F02B3/06

摘要： A diesel exhaust particulate filter contains a high temperature depth type filter material arranged in a reflexive path throughout which diesel particulates are collected from engine exhaust gases passed therethrough. Upstream and downstream portions of the filter flow path are disposed in heat exchange relation. Upon heating of the incoming gases to the incineration temperature of collected particulates, the heat of combustion in the downstream portion will be partially transferred to the upstream portion, providing more even temperature levels and improving balance of the incineration process.

摘要翻译： 柴油机排气微粒过滤器包含布置在反射路径中的高温深度型过滤材料，通过该过滤材料从其中通过的发动机废气中收集柴油颗粒。 过滤器流路的上游和下游部分以热交换关系设置。 在将进入的气体加热到收集的颗粒的焚烧温度时，下游部分中的燃烧热将部分地转移到上游部分，提供更均匀的温度水平并改善焚烧过程的平衡。