发明名称 |
Process for removing NO and N<sub>2</sub>O from gas mixtures |
摘要 |
A process is proposed for reprocessing the exhaust gas from a plant for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen for the purpose of utilization of at least a part of the nitrogen monoxide and if appropriate hydrogen present in the exhaust gas for producing hydroxylamine or hydroxylammonium salts, which comprises, in a first separation stage, selectively separating off nitrogen monoxide from the exhaust gas of the plant for producing hydroxylamine or hydroxylammonium salts. |
申请公布号 |
US8894960(B2) |
申请公布日期 |
2014.11.25 |
申请号 |
US200712517495 |
申请日期 |
2007.11.30 |
申请人 |
BASF SE |
发明人 |
Oost Carsten;Rohde Wolfgang;Miller Christian;Stroezel Manfred;Thome Alfred;Berning Wilfried |
分类号 |
C01C3/08;C01B21/00;C01B21/20;B01D53/86;C01B21/24;C01B21/14;B01D53/77 |
主分类号 |
C01C3/08 |
代理机构 |
Drinker Biddle & Reath LLP |
代理人 |
Drinker Biddle & Reath LLP |
主权项 |
1. A process for reprocessing the exhaust gas from a plant for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen for the purpose of utilization of at least a part of the nitrogen monoxide and if appropriate hydrogen present in the exhaust gas from a main reactor for producing hydroxylamine or hydroxylammonium salts, which comprises, in a first separation stage, selectively separating off nitrogen monoxide from the exhaust gas of the plant for producing hydroxylamine or hydroxylammonium salts and wherein a second separation stage is provided in which dinitrogen monoxide is removed from a residual gas of the first separation stage,
wherein the selective removal of nitrogen monoxide is carried out in a reactor for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen, which reactor is designed for complete conversion of the nitrogen monoxide, and which reactor is a separate reactor downstream from the main reactor, wherein said separate reactor downstream of the main reactor has a space-time yield, based on hydroxylamine or hydroxylammonium sulfate, of 30 to 60% below the space-time yield of the main reactor. |
地址 |
Ludwigshafen DE |