公开(公告)号：GR910300127T1

公开(公告)日：1992-05-12

申请号：GR910300127

申请日：1992-05-12

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  ENGLER BERND DR ,  SCHMIDT FELIX DR ,  SCHUBERT PETER DR ,  KOBERSTEIN EDGAR DR

IPC: B01J23/40 ,  B01D53/86 ,  B01D53/94 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/89 ,  B01J37/02 ,  F01N3/18 ,  F02B1/04

Abstract: Catalyst for purifying i.c. engine exhaust gas has an Al2O3 support of the transition series, which contains 3-70 (wt.)% CeO2, 0-20% La2O3, opt. mixed with other rare earth metal oxides, 1-20% ZrO2, 0-10% Fe2O3 and 0-20% NiO as promoter, and has an active phase of 0.02-3% Pt and/or Pd and Rh, with a ratio of Pt and/or Pd and Rh of 1:2 to 15:1, pref. 1:1 to 3:1 and opt. a wt. ratio of Pt and Pd of 10:1 to 1:5. The opt. lattice-stabilised support is impregnated with a soln. of a promoter cpd. and/or mixed with a suspension of oxides, hydroxides or carbonates of the promoter elements and heated in air at 300-900 deg.C, then impregnated with a soln. of the noble metal cpds.,dried and opt. activated in a gas contg. H2, opt. under hydrothermal conditions, at 250-1050 deg.C. The catalyst contains base metal(s), i.e. Li, K, Rb, Mg, Ca, Ba, La, Ce, Pr, Nd, Sm, Fe, Co and/or Ni, in an amt. up to 5 times the total amt. of noble metal; and is prepd. by impregnating the support contg. promoter with a soln. (A) of Pt and/or Pd cpd(s). corresp. to at least 30% of the total amt. of Pt and/or Pd, drying and activation, then impregnating with a soln. (B) contg. Rh cpd. opt. the rest of the Pt and/or Pd cpd. and base metal cpd(s)., followed by drying and activation.

公开(公告)号：AU605640B2

公开(公告)日：1991-01-17

申请号：AU2439888

申请日：1988-10-27

Applicant: DEGUSSA

Inventor： VOLKER HERBERT ,  DOMESLE RAINER DR ,  ENGLER BERND DR ,  KOBERSTEIN EDGAR DR

IPC: B01D53/94 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/89 ,  F02B1/04 ,  B01J23/54 ,  B01J35/04 ,  B01D53/36

Abstract: The invention is a three-way catalyst of active aluminum oxide, palladium, platinum and cerium dioxide. If Al2O3 is present as bulk carrier, the catalyst contains 5-20% by weight CeO2 and if Al2O3 is present as a coating on a honeycombed, inert carrier, it contains 25-50% by weight CeO2.

公开(公告)号：DE3902913A1

公开(公告)日：1990-08-09

申请号：DE3902913

申请日：1989-02-01

Applicant: DEGUSSA

Inventor： KOBERSTEIN EDGAR DR ,  ENGLER BERND DR ,  DOMESLE RAINER DR ,  SCHUBERT PETER DR

IPC: F01N3/28 ,  B01D53/94 ,  B01J23/10 ,  B01J23/54 ,  B01J23/56 ,  B01J23/63 ,  B01J23/89

Abstract: The invention relates to a support material for catalysts containing a platinum group metal for motor vehicle exhaust gas purification, the catalysts having a reduced tendency to emit H2S. The support material consists of a heat-treated, spray-dried combination of aluminium oxide and cerium oxide.

公开(公告)号：GR890300151T1

公开(公告)日：1990-03-14

申请号：GR890300151

申请日：1990-03-14

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  ENGLER BERND DR ,  KOBERSTEIN EDGAR DR ,  SCHUBERT PETER DR

IPC: B01D53/94 ,  B01J23/56 ,  B01J23/63 ,  B01J23/89 ,  B01J37/02 ,  B01D53/36

Abstract: The invention relates to an active alumina catalyst with additions of CeO2, ZrO2 and Fe2O3 and/or NiO as support and an active phase, applied thereto, of platinum, palladium and/or rhodium and a base metal, which catalyst is obtainable by impregnating the support containing the additives with solutions of salts of the metals for the active phase, the base metal of the active phase being cerium, and by drying and heating to 250 to 650 DEG C. The catalyst can be used for the oxidation and/or reduction of the exhaust gases from internal combustion engines.

公开(公告)号：AT17445T

公开(公告)日：1986-02-15

申请号：AT82109459

申请日：1982-10-13

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  KOBERSTEIN EDGAR DR ,  PLETKA HANS-DIETER DR ,  VOELKER HERBERT

IPC: F01N3/02 ,  B01D53/86 ,  B01D53/94 ,  B01J23/68 ,  B01J35/04 ,  B01J35/06 ,  F01N3/035 ,  F02B1/04 ,  F02B3/06 ,  B01D53/36

公开(公告)号：DE3223500A1

公开(公告)日：1983-12-29

申请号：DE3223500

申请日：1982-06-24

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  KOBERSTEIN EDGAR DR ING DR ,  PLETKA HANS-DIETER DR ,  VOELKER HERBERT ING GRAD

IPC: B01D53/94 ,  B01J23/89

Abstract: The invention relates to a three-way catalyst for purifying the exhaust gases from internal combustion engines and to its preparation process. It contains an active phase comprising specific amounts of palladium and rhodium disposed on alumina of the transition series doped with cerium oxide or a combination of cerium oxide and iron oxide instead of the acid or neutral support hitherto required for this type of catalyst.

公开(公告)号：DE3141713A1

公开(公告)日：1983-05-11

申请号：DE3141713

申请日：1981-10-21

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  KOBERSTEIN EDGAR DR ING DR ,  PLETKA HANS-DIETER DR ,  VOELKER HERBERT ING GRAD

IPC: F01N3/02 ,  B01D53/86 ,  B01D53/94 ,  B01J23/68 ,  B01J35/04 ,  B01J35/06 ,  F01N3/035 ,  F02B1/04 ,  F02B3/06 ,  F01N3/28

Abstract: A process and catalyst is disclosed for the reduction of the ignition temperature of diesel soot filtered out of the exhaust fumes of diesel engines by passing the exhaust stream through a filter element. The filter element is a temperature resistant inert support onto which is deposited a catalytically effective amount of silver vanadate or a mixture of the temperature resistant carrier material and a catalytically effective amount of silver vanadate.

公开(公告)号：DE3137169A1

公开(公告)日：1983-03-31

申请号：DE3137169

申请日：1981-09-18

Applicant: DEGUSSA

Inventor： DOMESLE RAINER DR ,  KOBERSTEIN EDGAR DR ING ,  PLETKA HANS-DIETER DR ,  VOELKER HERBERT ING GRAD

IPC: B01D53/86 ,  B01D53/94 ,  B01J23/44 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/89 ,  B01J35/04 ,  B01J37/02 ,  B01D53/36 ,  F01N3/20

Abstract: A catalyst is disclosed for combustion of pollutants contained in the exhaust gases of internal combustion engines operated with alcohol. The catalyst consists of a metal carrier, a coating deposited on it made of a catalytically active aluminum oxide and an amount of palladium deposited on said coating. A production process for the catalyst is described which provides a final activation in oxidizing atmosphere or a formation in the stream of the exhaust gas that is to be purified at certain temperatures as well as the use of the catalyst for the simultaneous elimination of aldehydes, alcohols, carbon monoxide and hydrocarbons present in the exhaust gas.

公开(公告)号：BR9905093A

公开(公告)日：2000-08-08

申请号：BR9905093

申请日：1999-10-11

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG DR ,  GOEBEL ULRICH DR ,  DOMESLE RAINER DR

IPC: B01D53/94 ,  B01J23/58 ,  B01J23/63 ,  B01J27/053 ,  B01J27/055 ,  B01J35/04 ,  B01J37/025

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：CZ359799A3

公开(公告)日：2000-06-14

申请号：CZ359799

申请日：1999-10-12

Applicant: DEGUSSA

Inventor： STREHLAU WOLFGANG DR ,  GOEBEL ULRICH DR ,  DOMESLE RAINER DR

IPC: B01J27/053 ,  B01D53/56 ,  B01D53/94