公开(公告)号：US5849257A

公开(公告)日：1998-12-15

申请号：US829612

申请日：1997-03-31

申请人： Kenji Fujiwara ,  Hideaki Nakamura ,  Hiroshi Kato ,  Susumu Yoshinaga ,  Kazuo Wakimura

发明人： Kenji Fujiwara ,  Hideaki Nakamura ,  Hiroshi Kato ,  Susumu Yoshinaga ,  Kazuo Wakimura

IPC分类号： B01J23/889 ,  C01B21/22 ,  C01B21/26

CPC分类号： C01B21/22 ,  B01J23/8892

摘要： A process for preparation of nitrous oxide, wherein ammonia is reacted with oxygen in the presence of steam using a copper-manganese oxide catalyst having diffraction angles measured by X-ray diffraction analysis of about 36.degree., about 58.degree. and about 64.degree.; a copper-manganese oxide catalyst suitable for the process. The catalyst is highly active and selective, has a long catalyst-lifetime, gives a non-condensable gas comprising nitrogen, oxygen and nitrous oxide which contains nitrous oxide in a high concentration, and is less deteriorative. The catalyst can be used in a process for preparation of nitrous oxide in which formation of NOx as by-products is reduced; and a process for stably recovering nitrous oxide.

摘要翻译： 一种制备一氧化二氮的方法，其中使用铜 - 锰氧化物催化剂，在蒸汽存在下使氨与氧反应，所述铜 - 锰氧化物催化剂的衍射角通过X射线衍射分析测量为约36°，约58°和约64°; 适用于该方法的铜 - 锰氧化物催化剂。 催化剂具有高活性和选择性，具有长的催化剂寿命，提供了含有高浓度一氧化二氮的氮，氧和一氧化二氮的不可冷凝气体，并且变质程度较小。 催化剂可用于制备一氧化二氮的方法，其中作为副产物形成的NOx被减少; 和一氧化二氮稳定回收的方法。

公开(公告)号：US5254729A

公开(公告)日：1993-10-19

申请号：US705363

申请日：1991-05-24

申请人： Kenji Fujiwara ,  Susumu Yoshinaga ,  Yuji Matsuu ,  Hiroshi Kato ,  Atsuhiko Hiai

发明人： Kenji Fujiwara ,  Susumu Yoshinaga ,  Yuji Matsuu ,  Hiroshi Kato ,  Atsuhiko Hiai

IPC分类号： C07C227/40 ,  C07C229/08 ,  C07C215/08

CPC分类号： C07C227/40

摘要： A method for purifying glycine characterized by comprising the steps of adjusting the pH of an aqueous glycine solution to 6 or less with a mineral acid and/or an organic acid or an acidic cation exchange resin and subsequently decoloring said aqueous glycine solution by active carbon treatment.