公开(公告)号：CA2255278C

公开(公告)日：2007-08-21

申请号：CA2255278

申请日：1998-12-03

Applicant: DEGUSSA

Inventor： KLEIN HARALD ,  KREUZER THOMAS ,  LOX EGBERT ,  DOMESLE RAINER ,  LEYRER JURGEN

IPC: B01J31/16 ,  B01J37/02 ,  B01J23/40 ,  B01J35/10

Abstract: The invention relates to a process for preparing a catalyst which has a catalytically-active coating of high surface area finely-divided materials and catalytically-active components on an inert support structure. A powder mixture of the finely-divided materials used is impregnated with a solution of precursor compounds of the catalytically-active components. By suitable combination of the finely-divided materials and the precursor compounds, and appropriate management of the impregnation process, a highly dispersed deposition and adsorption of the catalytically-active components is ensured on the finely-divided materials. Then an aqueous coating dispersion is produced using the impregnated powder mixture, and the support structure is coated therewith. The coating is then dried and calcined.

公开(公告)号：CA2202417C

公开(公告)日：2006-08-15

申请号：CA2202417

申请日：1997-04-11

Applicant: DEGUSSA

Inventor： KREUZER THOMAS ,  MULLER WILFRIED ,  LOX EGBERT ,  DOMESLE RAINER ,  LINDNER DIETER ,  LEYRER JURGEN

IPC: B01D53/86 ,  B01J29/068 ,  B01D53/94 ,  B01J21/12 ,  B01J29/03 ,  B01J29/06 ,  B01J29/08 ,  B01J29/12 ,  B01J29/40 ,  B01J29/44 ,  B01J29/80

Abstract: The invention relates to a catalyst for purifying the exhaust gases from diesel engines. The catalyst contains a zeolite mixture of several zeolites with different moduli and platinum group metals as well as further metal oxides from the group comprising aluminium silicate, aluminium oxide and titanium oxide, wherein the aluminium silicate has a ratio by weight of silicon dioxide to aluminium oxide of 0.005 to 1 and the platinum group metals are deposited on only the further metal oxides.

公开(公告)号：AU747495B2

公开(公告)日：2002-05-16

申请号：AU2244099

申请日：1999-03-26

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG ,  GOBEL ULRICH ,  DOMESLE RAINER ,  LOX EGBERT ,  KREUZER THOMAS

IPC: B01D53/34 ,  B01D53/50 ,  B01D53/81 ,  B01D53/86 ,  B01D53/94 ,  B01J20/04 ,  B01J20/08 ,  B01J23/42 ,  F01N3/08 ,  B01J23/02 ,  B01D53/04

Abstract: Storage material comprises magnesium oxide and aluminum oxide as a magnesium aluminate spinel in a mole ratio of 1.1:1. The magnesium oxide present in a stoichiometric excess is homogeneously dispersed in the storage material in a highly dispersed form. An Independent claim is also included for the production of the storage material comprising calcining a magnesium/aluminum hydrotalcite having a magnesium oxide/aluminum oxide mole ratio of 1.1:1 at a temperature of 400-600o C for 1-10 hours.

公开(公告)号：TR200100508A2

公开(公告)日：2001-09-21

申请号：TR200100508

申请日：2001-02-23

Applicant: DMC2 DEGUSSA METALS CATALYST C

Inventor： DOMESLE RAINER ,  KLEIN HERALD ,  KREUZER THOMAS ,  LOX EGBERT

IPC: F01N3/10 ,  B01D53/94 ,  B01J21/12 ,  B01J23/38 ,  B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J29/068 ,  B01J29/12 ,  B01J31/16 ,  B01J37/02 ,  B01J37/10 ,  F01N3/022 ,  F01N3/28

Abstract: A diesel engine gas catalyst has a zeolite with aluminum oxide or silicon dioxide, or titanium dioxide, or zirconium dioxide and aluminum silicate. The catalyst also has either platinum or rhodium and iridium. The noble metal has a median oxidation level of +2.5, with more than 3 metal ligands, and less than three oxygen ligands. Crystalline substances of average particle size 1-6 nm are present on the surface of the zeolite and substrate oxides. An Independent claim is also included for the production of the diesel exhaust catalytic converter. The ratio of the substrate oxide to the zeolite is 10:1-2:1. The mass ratio of the noble metal on the zeolite to the noble metals on the substrate oxide is 1:100-1:10. The noble metals are present in a concentration of 0.05-10 wt.% w.r.t the overall weight of the catalyst.

公开(公告)号：CA2339027A1

公开(公告)日：2001-09-01

申请号：CA2339027

申请日：2001-02-28

Applicant: DMC2 DEGUSSA METALS CATALYSTS

Inventor： DOMESLE RAINER ,  KLEIN HARALD ,  LOX EGBERT ,  KREUZER THOMAS

IPC: F01N3/10 ,  B01D53/94 ,  B01J21/12 ,  B01J23/38 ,  B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J29/068 ,  B01J29/12 ,  B01J31/16 ,  B01J37/02 ,  B01J37/10 ,  F01N3/022 ,  F01N3/28

Abstract: The invention relates to a catalyst for purifying the exhaust gases of diese l engines, which catalyst contains at least one zeolite and, additionally, at least one of the carrier oxides aluminium oxide, silicon dioxide, titanium dioxide and aluminium silicate and at least one of the noble metals platinum, palladium, rhodium and iridium. The catalyst is characterised in that the atoms of the noble metals have a mean oxidation number of less than +2.5, on average more than 3 metal ligands and less than 3 oxygen ligan ds and are present on the zeolites and carrier oxides in the form of crystallites havin g a mean particle size of from 1 to 6 nm.

公开(公告)号：ZA200101693B

公开(公告)日：2001-08-31

申请号：ZA200101693

申请日：2001-02-28

Applicant: DMC2 DEGUSSA METALS CATALYSTS CERDEC AG

Inventor： DOMESLE RAINER ,  KLEIN HARALD ,  KREUZER THOMAS ,  LOX EGBERT

IPC: F01N3/10 ,  B01D53/94 ,  B01J21/12 ,  B01J23/38 ,  B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J29/068 ,  B01J29/12 ,  B01J31/16 ,  B01J37/02 ,  B01J37/10 ,  F01N3/022 ,  F01N3/28 ,  B01D ,  B01J

Abstract: A diesel engine gas catalyst has a zeolite with aluminum oxide or silicon dioxide, or titanium dioxide, or zirconium dioxide and aluminum silicate. The catalyst also has either platinum or rhodium and iridium. The noble metal has a median oxidation level of +2.5, with more than 3 metal ligands, and less than three oxygen ligands. Crystalline substances of average particle size 1-6 nm are present on the surface of the zeolite and substrate oxides. An Independent claim is also included for the production of the diesel exhaust catalytic converter. The ratio of the substrate oxide to the zeolite is 10:1-2:1. The mass ratio of the noble metal on the zeolite to the noble metals on the substrate oxide is 1:100-1:10. The noble metals are present in a concentration of 0.05-10 wt.% w.r.t the overall weight of the catalyst.

公开(公告)号：PL335960A1

公开(公告)日：2000-04-25

申请号：PL33596099

申请日：1999-10-12

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG ,  GOEBEL ULRICH ,  DOMESLE RAINER

IPC: B01D53/94 ,  B01J23/58 ,  B01J23/63 ,  B01J27/053 ,  B01J27/055

Abstract: Nitrogen oxide-storage catalyst contains at least one fine particled catalyst material and nitrogen oxide-storage component. The nitrogen oxide-storage has an average particle diameter of less than 1 micrometer after the completion of catalyst production as fine particles of barium sulfate, strontium sulfate or as mixture thereof or as completed or incomplete decomposition product. Independent claims are included for: (a) nitrogen oxide-storage catalyst in the form of a coating on the walls of the flow canals of an inert honeycombed body containing fine particled catalyst material and a nitrogen oxide-storage component and (b) a method of producing nitrogen oxide-storage catalyst.

公开(公告)号：DE19847008A1

公开(公告)日：2000-04-20

申请号：DE19847008

申请日：1998-10-13

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG ,  GOEBEL ULRICH ,  DOMESLE RAINER

IPC: B01D53/94 ,  B01J23/58 ,  B01J23/63 ,  B01J27/053 ,  B01J27/055

Abstract: Nitrogen oxide-storage catalyst contains at least one fine particled catalyst material and nitrogen oxide-storage component. The nitrogen oxide-storage has an average particle diameter of less than 1 micrometer after the completion of catalyst production as fine particles of barium sulfate, strontium sulfate or as mixture thereof or as completed or incomplete decomposition product. Independent claims are included for: (a) nitrogen oxide-storage catalyst in the form of a coating on the walls of the flow canals of an inert honeycombed body containing fine particled catalyst material and a nitrogen oxide-storage component and (b) a method of producing nitrogen oxide-storage catalyst.

公开(公告)号：PL178211B1

公开(公告)日：2000-03-31

申请号：PL29771593

申请日：1993-02-12

Applicant: DEGUSSA

Inventor： DOMESLE RAINER ,  ENGLER BERND ,  KOBERSTEIN EDGAR ,  LOX EGBERT ,  OSTGATHE KLAUS

IPC: B01D53/94 ,  B01J21/04 ,  B01J23/10 ,  B01J23/56 ,  B01J23/40 ,  B01J23/62 ,  B01J23/63 ,  B01J23/64 ,  B01J23/89 ,  B01J32/00 ,  B01J33/00 ,  B01J35/04 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  B01J37/03

Abstract: The invention relates to a coating dispersion for producing catalyst-promoting coats on an inert, structure-reinforcing body. The solids of the dispersion are present in various grain size fractions and lead to a rougher coating surface having improved exchange between exhaust gas and catalyst surface and improved heating-up behaviour resulting therefrom.

公开(公告)号：AU4466799A

公开(公告)日：2000-03-09

申请号：AU4466799

申请日：1999-08-23

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG ,  DOMESLE RAINER ,  MUSSMANN LOTHAR ,  GOBEL ULRICH

IPC: B01D53/86 ,  B01D53/94 ,  B01J20/04 ,  B01J20/30 ,  B01J23/02 ,  B01J23/10 ,  B01J23/58 ,  B01J23/63 ,  B01J35/02 ,  B01J37/03 ,  F01N3/08 ,  F02B1/04 ,  B01D53/56

Abstract: The carrier material is selected from a group doping/donating cerium oxide, cerium/zircon-mixed oxide, calcium titanate, strontium titanate, barium titanate, barium stannate, barium zirconate, magnesium oxide, lanthan oxide, praseodymium oxide, samarium oxide, neodymium oxide, yttrium oxide, yttrium barium cuprate, lead titanate, bismuth titanate, lanthan cobaltate, lanthan manganate and barium cuprate or a mixture. The particles of the storage components has particle diameter of at least 1.5 micronmeter. Nitrogen oxide-storage material comprises at least a storage component for nitrogen oxide in the form of particles of oxide(s), carbonate(s), or hydroxide(s) of earth metals magnesium calcium, strontium and barium as well as alkali metals potassium and caesium on a carrier material. Independent claims are include for the production of storage material and use of nitrogen oxide-storage.