-
公开(公告)号:US06313323B1
公开(公告)日:2001-11-06
申请号:US09564877
申请日:2000-05-04
申请人: Harald Werner , Elke Schweers , Frank Olschewski , Gerhard Geiss , Elfriede Hufsky , Helmut Tränkler , Heinz Alexander
发明人: Harald Werner , Elke Schweers , Frank Olschewski , Gerhard Geiss , Elfriede Hufsky , Helmut Tränkler , Heinz Alexander
IPC分类号: C07D32306
CPC分类号: C07D323/06 , B01J27/16 , B01J27/1808 , B01J35/1009 , B01J35/1014 , B01J35/1038 , B01J35/1042 , B01J35/108 , C08G2/08 , C08G65/2642 , Y02P20/125
摘要: A process for the gas-phase trimerization of formaldehyde to give trioxane using solid phosphoric acid catalysts. Particularly suitable catalysts for this process are SPA catalysts (solid phosphorous acid), for example “silicon phosphates”. The main advantage of this catalyst system is its simple and inexpensive production and ready availability and also, in particular, its improved long-term stability compared to the few previously described catalysts which are mostly based on supported heteropolyacids.
摘要翻译: 使用固体磷酸催化剂使甲醛气相三聚化得到三恶烷的方法。 用于该方法的特别合适的催化剂是SPA催化剂(固体亚磷酸),例如“磷酸硅”。 该催化剂体系的主要优点是其简单且便宜的生产和即时可用性,并且特别是与之前描述的少量主要基于负载型杂多酸的催化剂相比,其改进的长期稳定性。