公开(公告)号：WO2015189235A1

公开(公告)日：2015-12-17

申请号：PCT/EP2015/062879

申请日：2015-06-10

Applicant: COVESTRO DEUTSCHLAND AG ,  BAYER MATERIALSCIENCE LLC

Inventor： PENNEMANN, Bernd ,  WESTPHAL, Ulrich ,  FÖRTSCH, Dieter ,  MILLER, Spotswood

IPC: C07C209/34

CPC classification number: B01D53/56 ,  B01D53/77 ,  C07C201/08 ,  C07C209/32 ,  C07C209/36 ,  C07C209/76 ,  C07C209/34 ,  C07C211/49 ,  C07C211/47 ,  C07C205/06 ,  C07C211/46

Abstract: Method for reducing the concentration of nitrogen oxides in waste gases released during the production of organic amino compounds, wherein an organic compound is first reacted with NO x and/or nitric acid to form an organic nitro compound with the formation of an NO x -containing waste gas stream and the organic nitro compound is converted to the organic amino compound by means of a hydrogen-containing reaction gas, the reaction of the organic nitro compound with the hydrogen-containing reduction gas taking place with the formation of a hydrogen-containing waste gas stream, the method being characterised in that the NO x -containing waste gas stream (1) is combined with the hydrogen-containing waste gas stream and/or an externally supplied hydrogen stream (3) and is reacted at a temperature of 800 to 1700°C for the at least partial reduction of the NO x concentration. An apparatus for carrying out the method is also described.

Abstract translation: 减少在生产有机氨基化合物期间释放的废气中的氮氧化物浓度的方法，其中有机化合物首先与NO x和/或硝酸反应形成有机硝基化合物，形成含NO x的废气 流，有机硝基化合物通过含氢反应气体转化为有机氨基化合物，有机硝基化合物与含氢还原气体的反应发生，形成含氢废气流 该方法的特征在于含有NO x的废气流（1）与含氢废气流和/或外部供应的氢气流（3）组合，并在800至1700℃的温度下反应 用于至少部分地降低NOx浓度。 还描述了用于执行该方法的装置。