公开(公告)号：US20030007904A1

公开(公告)日：2003-01-09

申请号：US10162850

申请日：2002-06-06

Inventor： Anna Lee Y. Tonkovich ,  Yong Wang ,  Yufei Gao

IPC: B01J008/02 ,  B01J021/04 ,  B01J035/04

CPC classification number: B01J37/0244 ,  B01J35/04 ,  B01J37/0225 ,  B01J2219/00835 ,  Y10T29/49345

Abstract: The present invention includes a catalyst having a layered structure with, (1) a porous support, (2) a buffer layer, (3) an interfacial layer, and optionally (4) a catalyst layer. The invention also provides a process in which a reactant is converted to a product by passing through a reaction chamber containing the catalyst.

公开(公告)号：US20020058841A1

公开(公告)日：2002-05-16

申请号：US09985982

申请日：2001-11-07

Inventor： Andreas Ansmann ,  Christoph Benisch ,  Frank Funke ,  Frank Ohlbach ,  Martin Merger

IPC: C07C29/48 ,  B01J021/04

CPC classification number: C07D295/13 ,  B01J25/00 ,  B01J37/0018 ,  C07C209/48 ,  C07C211/14 ,  C07C211/36

Abstract: Nitriles are hydrogenated to primary amines over an activated, alpha-Al2O3-containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, which is obtainable by a process comprising the steps in the order (a)-(f): (a) preparing a kneadable composition comprising the alloy, a shaping aid, water and a pore former; (b) shaping the kneadable composition to form a shaped body; (c) calcining the shaped body; (d) activating the calcined shaped body by treatment with aqueous alkali metal hydroxide solution; (e) rinsing the shaped catalyst body with aqueous alkali metal hydroxide solution; (f) rinsing the shaped catalyst body with water.

Abstract translation: 基于铝和至少一种选自铁，钴和镍的过渡金属的合金，并且如果需要，腈在一种活化的含α-Al 2 O 3的大孔阮内催化剂上氢化成伯胺，如果需要， 更优选的选自钛，锆，铬和锰的过渡金属，其可通过包括以下步骤（a） - （f）的方法获得：（a）制备包含该合金的可捏合组合物， 成型助剂，水和成孔剂; （b）使捏合组合物成型以形成成形体; （c）煅烧成形体; （d）用碱金属氢氧化物水溶液处理活化煅烧成形体; （e）用碱金属氢氧化物水溶液冲洗成型的催化剂体; （f）用水冲洗成型的催化剂体。

公开(公告)号：US20020004455A1

公开(公告)日：2002-01-10

申请号：US09871904

申请日：2001-06-04

Inventor： Tomohiko Nakanishi ,  Masanori Yamada ,  Yosiyasu Andou

IPC: B01J021/04 ,  B01J023/02

CPC classification number: B01D53/9422 ,  B01D2255/202 ,  B01D2255/2022 ,  B01D2255/204 ,  B01D2255/2042 ,  B01J23/02 ,  B01J35/002 ,  B01J35/04 ,  B01J37/0238 ,  B01J37/0244 ,  Y10T428/24149

Abstract: A ceramic carrier and ceramic catalyst body used as NOx purification catalysts for lean burn engines, which are inexpensive, exhibit high temperature durability and can maintain their catalytic function for extended periods. The ceramic carrier has a diffusion-inhibiting layer formed on the surface of a cordierite honeycomb structure, to inhibit diffusion of alkali metals, alkaline earth metals, etc. carried as NOx storage materials. The diffusion-inhibiting layer is composed of a ceramic material such as Y2O3, NiO or CeO2 which does not react with alkali metals or alkaline earth metals at temperatures of up to 1000null C. and has a melting point of higher than 1000null C., and the diffusion-inhibiting layer inhibits diffusion of catalyst components such as potassium into the interior to prevent their reaction with cordierite, so that the durability is greatly enhanced without reducing catalytic performance.

Abstract translation: 用作稀薄燃烧发动机的NOx净化催化剂的陶瓷载体和陶瓷催化剂体，其廉价，表现出高温耐久性并且可以长时间保持其催化功能。 陶瓷载体在堇青石蜂窝结构体的表面形成有扩散抑制层，以抑制作为NOx储存材料携带的碱金属，碱土金属等的扩散。 扩散抑制层由陶瓷材料如Y2O3，NiO或CeO2组成，在高达1000℃的温度下不与碱金属或碱土金属反应，熔点高于1000℃。 ，并且扩散抑制层抑制诸如钾的催化剂组分扩散到内部以防止其与堇青石反应，从而在不降低催化性能的情况下大大提高耐久性。