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    HIGH PERFORMANCE CATALYST CONTAINING PRECIOUS METAL AND MANUFACTURE THEREOF
    2.
    发明专利
    HIGH PERFORMANCE CATALYST CONTAINING PRECIOUS METAL AND MANUFACTURE THEREOF 失效

    公开(公告)号：JP2000312825A

    公开(公告)日：2000-11-14

    申请号：JP2000121450

    申请日：2000-04-21

    Applicant: DEGUSSA

    Inventor： MUSSMANN LOTHAR DR ,  LINDNER DIETER DR ,  HARRIS MICHAEL ,  KREUZER THOMAS DR ,  LOX EGBERT DR

    IPC: B01J23/46 ,  B01D53/94 ,  B01J23/42 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/656 ,  B01J23/89 ,  B01J35/04 ,  B01J37/02 ,  B01J37/025

    Abstract: PROBLEM TO BE SOLVED: To speed up the recovery treatment of the performance of a catalyst by forming an inside layer to be formed on a high performance catalyst on a first carrier material through adding platinum stacked on a first oxygen occlusion component and forming an outside layer through adding the platinum and rhodium stacked on a second carrier material. SOLUTION: A three-dimensional catalyst to be used for cleaning contaminants such as CO, HC and NOx contained in an exhaust gas from an internal combustion engine, has an inside and an outside layer containing a precious metal of the platinum family stacked on a carrier material, formed on an inactive carrier. In this catalyst, the inside layer is formed on a first carrier material through adding platinum stacked on a first oxygen occlusion component. The outside layer is formed through adding the platinum and rhodium stacked on a second carrier material and at the same time, adding a second oxygen occlusion component. Thus it is possible to speed up the recovery treatment of the catalyst after its aging at a high temperature under lean exhaust gas conditions by forming the double-layer catalyst as described.

    4.
    发明专利
    未知

    公开(公告)号：DE10022842A1

    公开(公告)日：2001-11-22

    申请号：DE10022842

    申请日：2000-05-10

    Applicant: DMC2 DEGUSSA METALS CATALYSTS

    Inventor： HARRIS MICHAEL ,  LEYRER JUERGEN ,  DEMEL YVONNE ,  LOX EGBERT ,  KREUZER THOMAS

    IPC: F01N3/08 ,  B01D53/86 ,  B01D53/94 ,  B01J21/06 ,  B01J23/20 ,  B01J23/28 ,  B01J23/30 ,  B01J29/24 ,  B01J29/46 ,  B01J35/02 ,  B01J35/04 ,  F01N3/10 ,  F01N3/20 ,  F01N3/28

    Abstract: A structurized catalyst selectively reduces nitrogen oxides (NOx) in the lean exhaust gas stream from an internal combustion engine with ammonia (NH3). A hydrolyzable ammonium compound is injected into the structurized catalyst and contains a selective reduction catalyst and a catalyst for hydrolysis of the ammonium compound to NH3 as coating on the selective reduction catalyst. A structurized catalyst selectively reduces nitrogen oxides (NOx) in the lean exhaust gas stream from an internal combustion engine with ammonia (NH3). A hydrolyzable ammonium compound is injected in aerosol form into the structurized catalyst. The structurized catalyst is monolithic and has several flow paths for the lean exhaust gas stream between its inlet and outlet ends. The structurized catalyst contains a selective reduction catalyst and a catalyst for hydrolysis of the ammonium compound to NH3 as coating on the selective reduction catalyst.

    5.
    发明专利
    未知

    公开(公告)号：TR200001071A2

    公开(公告)日：2000-11-21

    申请号：TR200001071

    申请日：2000-04-20

    Applicant: DEGUSSA

    Inventor： MUSSMANN DR LOTHAR ,  LINDNER DR DIETER ,  HARRIS MICHAEL ,  KREUZER DR THOMAS ,  LOX DR EGBERT

    IPC: B01J23/46 ,  B01D53/94 ,  B01J23/42 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/656 ,  B01J23/89 ,  B01J35/04 ,  B01J37/02 ,  B01J37/025 ,  B01J

    Abstract: High performance catalyst contains an inner and outer layer on an inert carrier body comprising noble metals from platinum group deposited on support materials. High performance catalyst contains an inner and outer layer on an inert carrier body comprising noble metals from platinum group deposited on support materials. The inner layer comprises platinum deposited on a first support and on a first oxygen storage component. The outer layer comprises platinum and rhodium deposited on a second support and further comprises a second oxygen storage component. An independent claim is included for a method of manufacturing the catalyst comprising: (a) coating the wall of the passage ways of the catalyst carrier with an aqueous coating composition containing the particulate support materials of the inner layer; (b) drying and calcining the coating; (c) dipping the coated carrier body into a solution of a soluble precursor compound of platinum and calcining the coating; and (d) applying the outer layer on top of the inner layer.

    7.
    发明专利
    未知

    公开(公告)号：BR0001659A

    公开(公告)日：2000-10-31

    申请号：BR0001659

    申请日：2000-04-20

    Applicant: DEGUSSA

    Inventor： MUSSMANN LOTHAR DR ,  LINDNER DIETER DR ,  HARRIS MICHAEL ,  KREUZER THOMAS DR ,  LOX EGBERT DR

    IPC: B01J23/46 ,  B01D53/94 ,  B01J23/42 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/656 ,  B01J23/89 ,  B01J35/04 ,  B01J37/02 ,  B01J37/025 ,  B01J23/40

    Abstract: High performance catalyst contains an inner and outer layer on an inert carrier body comprising noble metals from platinum group deposited on support materials. High performance catalyst contains an inner and outer layer on an inert carrier body comprising noble metals from platinum group deposited on support materials. The inner layer comprises platinum deposited on a first support and on a first oxygen storage component. The outer layer comprises platinum and rhodium deposited on a second support and further comprises a second oxygen storage component. An independent claim is included for a method of manufacturing the catalyst comprising: (a) coating the wall of the passage ways of the catalyst carrier with an aqueous coating composition containing the particulate support materials of the inner layer; (b) drying and calcining the coating; (c) dipping the coated carrier body into a solution of a soluble precursor compound of platinum and calcining the coating; and (d) applying the outer layer on top of the inner layer.

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