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1. 发明授权

US5955045A Removal of nitrogen oxides from gases 失效
标题翻译：从气体中去除氮氧化物
公开(公告)号：US5955045A
公开(公告)日：1999-09-21
申请号：US874662
申请日：1997-06-13
申请人： Karl Baur , Hans-Peter Langebach , Hartmut Neumann , Ulrike Wenning
发明人： Karl Baur , Hans-Peter Langebach , Hartmut Neumann , Ulrike Wenning
IPC分类号： B01D53/56 , C07C7/148 , C10G70/04 , B01D53/02
CPC分类号： C07C7/1485 , B01D53/565 , C10G70/046
摘要： For selectively removing nitrogen oxides from a carrier gas that contains hydrocarbons, the nitrogen oxides are removed by chemisorption on metal oxides, without the occurrence of undesirable secondary reactions. The metal oxides are preferably formed from metals of the 6th to 8th subgroups, whereby manganese dioxide (MnO.sub.2,) is especially preferred as a metal oxide. The process can be conducted with one or more reactor beds, which preferably operate at 10 to 40.degree. C. and are regenerated with nitrogen at a temperature of 130 to 170.degree. C.By removing nitrogen oxides from an olefin-rich gas, for example from the waste gas of an FCC unit, the resultant gas can then be fed to a cryogenic olefin extraction stage without danger of explosion.Such a waste gas contains unsaturated hydrocarbons, hydrogen, carbon monoxide, and oxygen, the oxygen having a concentration preferably between 100 and 5000 mol ppm.
摘要翻译：为了从含有烃的载气中选择性地除去氮氧化物，通过金属氧化物上的化学吸附除去氮氧化物，而不会发生不希望的二次反应。金属氧化物优选由第6〜8族的金属形成，特别优选二氧化锰（MnO 2）作为金属氧化物。该方法可以用一个或多个反应器床进行，优选在10至40℃下操作，并在130-170℃的温度下用氮气再生。通过从富含烯烃的气体中除去氮氧化物，例如从FCC装置的废气中获得的气体可以被送入低温烯烃提取阶段而不会有爆炸的危险。这样的废气含有不饱和烃，氢，一氧化碳和氧，氧浓度优选为100-5000mol ppm。

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