公开(公告)号：EP1187675A1

公开(公告)日：2002-03-20

申请号：EP00925405.3

申请日：2000-05-05

申请人： Rhodia Chimie ,  Ecia ,  RENAULT

发明人： BERT, Christian ,  BIRCHEM, Thierry ,  BOULY, Christophe ,  GUYON, Marc ,  HEDOUIN, Catherine ,  MORAL, Najat ,  PONTIER, Thierry ,  SARDA, Christian ,  SEGUELONG, Thierry

IPC分类号： B01J35/00 ,  B01J23/34 ,  B01D53/94

CPC分类号： B01D53/9481 ,  B01D53/9422 ,  B01D2255/2022 ,  B01D2255/2027 ,  B01D2255/2042 ,  B01D2255/2073 ,  B01D2255/9022 ,  B01D2255/9207 ,  B01J20/041 ,  B01J20/06 ,  B01J20/103 ,  B01J20/28057 ,  B01J20/3204 ,  B01J20/3236 ,  B01J23/02 ,  B01J23/10 ,  B01J23/34 ,  B01J37/0244 ,  C01G25/006 ,  C01P2006/12

摘要： The invention concerns a compound and its use as NOx trap in the treatment of exhaust gases. Said compound is characterised in that it comprises a combination of: a first composition comprising a support and an active phase, the active phase being based on manganese and at least another element A selected among the alkalines and alkaline earths, the manganese and the element A being chemically bound, a second composition comprising a support and an active phase based on manganese and at least another element B selected among the alkalines, the alkaline-earths and rare earths, said second composition having or capable of having a specific surface area of at least 10 m2/g after being calcined for 8 hours at 800 °C.

公开(公告)号：EP0906244B1

公开(公告)日：2002-01-23

申请号：EP97924068.6

申请日：1997-05-09

申请人： RHODIA CHIMIE

发明人： AUBERT, Maryline ,  BIRCHEM, Thierry ,  BLANCHARD, Gilbert

IPC分类号： C01G25/00 ,  B01J23/10 ,  B01D53/94

CPC分类号： B01D53/945 ,  B01J23/10 ,  B01J35/002 ,  B01J35/1014 ,  B01J37/03 ,  C01G25/00 ,  C01G25/006 ,  C01P2006/12 ,  C07C17/15 ,  Y02A50/2324 ,  Y02T10/22

公开(公告)号：EP1171236A1

公开(公告)日：2002-01-16

申请号：EP00917174.5

申请日：2000-04-10

申请人： RHODIA CHIMIE

发明人： BIRCHEM, Thierry ,  HEDOUIN, Catherine ,  SEGUELONG, Thierry

IPC分类号： B01J23/34 ,  B01D53/94

CPC分类号： B01D53/9422 ,  B01D2255/2022 ,  B01D2255/2027 ,  B01D2255/2042 ,  B01D2255/2073 ,  B01D2258/012 ,  B01J23/34

摘要： The invention concerns compositions used as NOx trap, based on manganese and an alkaline or an alkaline-earth and their use for treating exhaust gases. Said compositions comprise a carrier and an active phase; and they are characterised in that the active phase is based on manganese and at least another element A selected among alkalines or alkaline-earths, the manganese and element A being chemically bound. Said compositions can be used in a process for treating gases to reduce nitrogen oxide emissions, as NOx traps, said gases being derived from internal combustion engines and in particular diesel engines or lean-burn engines.

公开(公告)号：EP0906244A1

公开(公告)日：1999-04-07

申请号：EP97924068.0

申请日：1997-05-09

申请人： RHODIA CHIMIE

发明人： AUBERT, Maryline ,  BIRCHEM, Thierry ,  BLANCHARD, Gilbert

IPC分类号： F01N3 ,  B01D53 ,  B01J23 ,  C01G25 ,  C07C17 ,  B01J35 ,  B01J37

CPC分类号： B01D53/945 ,  B01J23/10 ,  B01J35/002 ,  B01J35/1014 ,  B01J37/03 ,  C01G25/00 ,  C01G25/006 ,  C01P2006/12 ,  C07C17/15 ,  Y02A50/2324 ,  Y02T10/22

摘要： The invention discloses a cerium oxide and zirconium oxide based composition and, optionally an yttrium, scandium or rare earth oxide, in an cerium zirconium atomic proportion of at least 1, characterised in that it has a specific area after 6 hour calcination at 900 °C of at least 35m2/g and an oxygen storage capacity at 400 °C of at least 1.5ml of O¿2?/g. This composition is prepared by mixing, in a liquid medium, a cerium compound, a zirconium compound and, if necessary, an yttrium, scandium or rare earth compound; heating and calcining the resulting precipitate. The said mixture is prepared by using a zirconium solution such that the base amount required to reach the equivalent point during an acid-base titration of this solution verifies the mol ratio condition OH?-¿/Zr≤1.65. The composition can be used in the manufacture of catalysts for motor vehicle post combustion.