基本信息:
- 专利标题： HYDROTHERMALLY STABLE METAL PROMOTED ZEOLITE BETA FOR NOx REDUCTION
- 专利标题（中）：用于NOx还原的HYDROTHERMALLY STABLE METAL PROMOTED ZEOLITE BETA
- 申请号：PCT/US0145377 申请日：2001-10-31
- 公开(公告)号：WO0241991A2 公开(公告)日：2002-05-30
- 发明人： TRAN PASCALINE H , LIU XINSHENG , CHEN JAMES M , LAPADULA GERARD D , FURBECK HOWARD
- 申请人： ENGELHARD CORP
- 专利权人： ENGELHARD CORP
- 当前专利权人： ENGELHARD CORP
- 优先权： US71221000 2000-11-15
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01D53/86 ; B01D53/90 ; B01J29/06 ; B01J29/08 ; B01J29/18 ; B01J29/40 ; B01J29/50 ; B01J29/70 ; B01J29/76 ; B01J35/00 ; B01J37/02 ; C01B39/46 ; B01J29/00
摘要：
The present invention is directed to a metal-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the zeolite beta is pre-treated so as to provide the zeolite with improved hydrothermal stability. The stabilized beta zeolite is provided by incorporating into the zeolite structure non-framework aluminum oxide chains. The aluminum oxide chains can be incorporated into the zeolite structure by a unique steaming regimen or by treatment with rare earth metals, such as cerium. The treatment process is unlike well-known methods of dealuminizing zeolites for the purpose of increasing the silica to alumina ratio. In the present invention, the non-framework aluminum oxide is characterized by FT-IR by a peak at 3781+2 cm , which when present, stabilizes the zeolite against further dealumination such as under oxidizing and harsh hydrothermal conditions.
摘要（中）：
本发明涉及一种可用于用氨选择性催化还原氮氧化物的金属促进的沸石β催化剂，其中β沸石被预处理，以提供具有改进的水热稳定性的沸石。 稳定的β沸石是通过掺入沸石结构的非骨架氧化铝链来提供的。 氧化铝链可以通过独特的蒸汽方案或通过用稀土金属如铈处理而结合到沸石结构中。 处理过程不同于众所周知的用于增加二氧化硅与氧化铝比例的方法来使沸石脱铝。 在本发明中，非骨架氧化铝的特征在于FT-IR在3781±2cm -1处的峰，当存在时，稳定了沸石以防止进一步脱铝，例如在氧化和苛刻的水热条件下。