公开(公告)号：US20050196333A1

公开(公告)日：2005-09-08

申请号：US11037551

申请日：2005-01-18

申请人： Adolf Schafer-Sindlinger ,  Marcus Pfeifer ,  Paul Spurk ,  Yvonne Demel ,  Thomas Kreuzer ,  Egbert Lox

发明人： Adolf Schafer-Sindlinger ,  Marcus Pfeifer ,  Paul Spurk ,  Yvonne Demel ,  Thomas Kreuzer ,  Egbert Lox

IPC分类号： F01N3/08 ,  B01D53/34 ,  B01D53/56 ,  B01D53/74 ,  B01D53/86 ,  B01D53/94 ,  B01J8/02 ,  B01J21/00 ,  B01J23/80 ,  B01J29/06 ,  B01J29/064 ,  B01J29/072 ,  B01J29/076 ,  B01J29/46 ,  B01J35/04 ,  B01J37/02 ,  B01J37/30 ,  C01B21/00 ,  C01B21/04 ,  F01N3/10 ,  F01N3/20 ,  F01N3/28

CPC分类号： F01N3/2066 ,  B01D53/9418 ,  B01D53/9477 ,  B01D2251/2067 ,  B01D2255/2065 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/504 ,  B01D2255/808 ,  B01J29/072 ,  B01J29/46 ,  B01J35/04 ,  B01J37/0215 ,  F01N2610/02 ,  Y02T10/24

摘要： A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a fraction of the nitrogen monoxide present in the exhaust gas is oxidized to nitrogen dioxide before the exhaust gas, together with ammonia, is passed over the reduction catalyst. The reduction catalyst contains a zeolite exchanged with transition metals and oxidation of the nitrogen monoxide is performed in such a way that the exhaust gas contains 30 to 70 vol. % of nitrogen dioxide before contact with the reduction catalyst.

公开(公告)号：US5364984A

公开(公告)日：1994-11-15

申请号：US948718

申请日：1992-09-24

申请人： Dietrich Arntz ,  Thomas Haas ,  Adolf Schafer-Sindlinger

发明人： Dietrich Arntz ,  Thomas Haas ,  Adolf Schafer-Sindlinger

IPC分类号： B01J23/42 ,  C07B61/00 ,  C07C29/141 ,  C07C31/20

CPC分类号： C07C29/141

摘要： Disclosed is a process for the preparation of 1,3-propanediol by the hydrogenation of hydroxypropionaldehyde (HPA) in aqueous solution on a formed carrier catalyst in a solid bed, the concentration of HPA in the solution being from 5 to 100% by weight and hydrogenation being carried out at temperatures of from 30.degree. to 180.degree. C. and hydrogen pressures of from 5 to 300 bar and at a pH of from 2.5 to 6.5. The carrier catalyst is formed principally of titanium oxide on which platinum is applied in a finely divided form in a quantity of from 0.1 to 5.0% by weight, based on the carrier.

摘要翻译： 公开了通过在固体床中形成的载体催化剂上的羟基丙醛（HPA）在水溶液中氢化制备1,3-丙二醇的方法，溶液中HPA的浓度为5至100重量％，以及 氢化在30至180℃的温度和5至300巴的氢气压力和2.5至6.5的pH下进行。 载体催化剂主要由氧化钛形成，其上以基于载体的0.1至5.0重量％的量以细碎形式施加铂。