公开(公告)号：US06627167B2

公开(公告)日：2003-09-30

申请号：US09756075

申请日：2001-01-08

Applicant: Seong-Ihl Woo ,  Do-Kyoung Kim ,  Do-Heui Kim

Inventor： Seong-Ihl Woo ,  Do-Kyoung Kim ,  Do-Heui Kim

IPC: B01J29068

CPC classification number: B01J37/0238 ,  B01D53/945 ,  B01J29/44 ,  Y02A50/2324 ,  Y02T10/22

Abstract: The present invention relates to a catalyst for automotive lean-burn engine comprising platinum impregnated on a zeolite support and a process for preparing the same. In accordance with the invention, the catalyst comprising a platinum-impregnated zeolite support can be prepared by sublimation, where the zeolite support effectively eliminates hydrocarbons from automotive exhaust gases by adsorption, and platinum as an active component of the catalyst exerts its catalytic activity through the direct decomposition of nitrogen oxides contained in automotive exhaust gases. Furthermore, the catalyst of the invention provides a widened temperature window for maximum catalytic activity and improved catalytic activity, compared to those of the conventional catalysts. Accordingly, the invented catalyst for automotive lean-burn engine can effectively remove polluting substances such as nitrogen oxides and hydrocarbon present in lean-burn exhaust gases by selective reduction in a continuous reactor, and may be useful in the post-treatment of automotive exhaust gases.

公开(公告)号：US06576581B1

公开(公告)日：2003-06-10

申请号：US09746584

申请日：2000-12-21

Applicant: Sanjay B. Sharma ,  Aaron J. Imrie

Inventor： Sanjay B. Sharma ,  Aaron J. Imrie

IPC: B01J29068

CPC classification number: C07C5/2724 ,  B01J29/005 ,  B01J29/12 ,  B01J29/22 ,  B01J29/44 ,  B01J29/67 ,  B01J29/74 ,  B01J29/7446 ,  B01J29/7453 ,  B01J29/7469 ,  B01J29/7484 ,  B01J29/84 ,  B01J29/85 ,  B01J2229/20 ,  B01J2229/36 ,  B01J2229/42 ,  C07C2523/40 ,  C07C2529/04 ,  C07C2529/068 ,  C07C15/067

Abstract: This invention is drawn to a catalyst system comprising two or more molecular sieves, including at least one non-zeolitic molecular sieve and one zeolitic aluminosilicate, having specified contrasting pore structures and to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using the subject catalyst system to obtain an improved yield of para-xylene from the mixture relative to prior-art processes.

Abstract translation: 本发明涉及包含两种或多种分子筛的催化剂体系，所述分子筛包括具有特定对比孔结构的至少一种非沸石分子筛和一种沸石硅铝酸盐，以及使用二甲苯和乙苯的非平衡混合物异构化的方法，使用 本发明的催化剂体系相对于现有技术的方法从混合物中获得提高的对二甲苯的产率。

公开(公告)号：US06528031B1

公开(公告)日：2003-03-04

申请号：US09476238

申请日：1999-12-30

Applicant: Sang Eon Park ,  Yong Ki Park ,  Jin Woo Lee ,  Chul Wee Lee ,  Jong San Chang ,  Jung Kuk Cho

Inventor： Sang Eon Park ,  Yong Ki Park ,  Jin Woo Lee ,  Chul Wee Lee ,  Jong San Chang ,  Jung Kuk Cho

IPC: B01J29068

CPC classification number: B01J37/0207 ,  B01D53/8628 ,  B01D53/9418 ,  B01D2251/208 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/106 ,  B01D2255/2065 ,  B01D2255/502 ,  B01J29/068 ,  B01J29/44 ,  B01J37/0018 ,  Y02A50/2325

Abstract: The present invention provides a method for preparing a catalyst for the reduction of nitrogen oxides by the use of natural gas as a reducing agent in an excess oxygen atmosphere, which comprises of filling zeolite with an organic compound having molecular weight of 100˜250 prior to loading catalytically active noble metal components on a zeolite. Since the method according to the present invention supports catalytic active noble metal components on a zeolite under the condition that the pores of zeolite are filled with organic compounds, the noble metal component, which is essential for forming highly active NOx reduction catalyst, can be supported precisely on the desired positions of zeolite pores. Therefore, the NOx reduction catalysts prepared by the present invention are very useful for the purification of exhaust gas in an excessive oxygen atmosphere such as gas turbines, boilers or lean-burn automobiles.

Abstract translation: 本发明提供一种制备用于在过量氧气氛中使用天然气作为还原剂还原氮氧化物的催化剂的方法，其包括在分子量为100〜250之前将沸石与分子量为100〜250的有机化合物进行填充， 在沸石上加载催化活性的贵金属组分。 由于根据本发明的方法在沸石的孔填充有机化合物的条件下在沸石上支持催化活性贵金属组分，因此可以支持对形成高活性NOx还原催化剂至关重要的贵金属组分 精确地在沸石孔的所需位置。 因此，本发明制备的NOx还原催化剂对于在诸如燃气轮机，锅炉或贫燃汽车的过氧气氛中净化废气非常有用。

公开(公告)号：US06518213B1

公开(公告)日：2003-02-11

申请号：US09617489

申请日：2000-07-14

Applicant: Shinji Yamamoto ,  Masahiro Takaya

Inventor： Shinji Yamamoto ,  Masahiro Takaya

IPC: B01J29068

CPC classification number: B01J37/0246 ,  B01D53/945 ,  B01D53/9486 ,  B01D2253/342 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2068 ,  B01D2255/20715 ,  B01J23/58 ,  B01J37/0244 ,  Y02T10/22

Abstract: An exhaust gas purifying catalyst comprises a hydrocarbon adsorbent layer and a metal-based catalyst layer on a monolithic support. The catalyst contains zeolite in the underlying hydrocarbon adsorbent layer and contains noble metals such as palladium, platinum, rhodium, etc. in the overlying metal-based catalyst layer. Also, both layers contain an alkaline metal, etc., and a weight ratio of the alkaline metal, etc. contained in the metal-based catalyst layer to the alkaline metal, etc. contained in the hydrocarbon adsorbent layer is set to 60:40 to 99:1. A process for preparing the above catalyst comprises forming the metal-based catalyst by coating slurry. The slurry contains water insoluble or water hardly-soluble alkaline metal and/or alkaline earth metal compound.

Abstract translation: 废气净化催化剂包括烃吸附剂层和在整体式载体上的金属基催化剂层。 催化剂在下面的烃吸附剂层中含有沸石，并且在上覆的金属基催化剂层中含有贵金属如钯，铂，铑等。 此外，两层都含有碱金属等，并且包含在烃类吸附剂层中的金属类催化剂层中所含的碱金属等与碱金属等的重量比设定为60:40 至99：1。 制备上述催化剂的方法包括通过涂布浆料形成金属基催化剂。 该浆液含有不溶于水或难溶于水的碱金属和/或碱土金属化合物。

公开(公告)号：US06218328B1

公开(公告)日：2001-04-17

申请号：US09222446

申请日：1998-12-29

Applicant: An-hsiang Wu ,  Charles A. Drake

Inventor： An-hsiang Wu ,  Charles A. Drake

IPC: B01J29068

CPC classification number: B01J29/605 ,  B01J29/60 ,  B01J37/0009

Abstract: A process in which a hydrocarbon feedstock containing n-butane is selectively dehydrogenated to a product containing butenes; a catalyst suitable for the selective dehydrogenation of a feedstock containing n-butane to provide a product containing butenes and a method for producing a catalyst suitable for the selective dehydrogenation of a feedstock containing n-butane to provide a product containing butenes are provided.

Abstract translation: 将含有正丁烷的烃原料选择性脱氢成含有丁烯的产物的方法; 提供了适用于含有正丁烷的原料的选择性脱氢以提供含有丁烯的产物的催化剂，以及一种制备适用于含有正丁烷的原料的选择性脱氢以提供含有丁烯的产物的催化剂的方法。