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    65.
    发明专利
    未知

    公开(公告)号：BR8205465A

    公开(公告)日：1983-08-23

    申请号：BR8205465

    申请日：1982-09-17

    Applicant: DEGUSSA

    Inventor： DOMESLE RAINER ,  VOLKER HERBERT ,  KOBERSTEIN EDGAR ,  PLETKA HANS DIETER

    IPC: B01D53/86 ,  B01D53/94 ,  B01J23/44 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/89 ,  B01J35/04 ,  B01J37/02 ,  B01D53/26 ,  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.

    68.
    发明专利
    未知

    公开(公告)号：BR0100770A

    公开(公告)日：2001-10-02

    申请号：BR0100770

    申请日：2001-02-28

    Applicant: DMC2 DEGUSSA METALS CATALYSTS

    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

    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.

    A process for preparing a catalyst
    69.
    发明专利
    A process for preparing a catalyst 未知

    公开(公告)号：AU733354B2

    公开(公告)日：2001-05-10

    申请号：AU9520998

    申请日：1998-12-03

    Applicant: DEGUSSA

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

    IPC: B01J31/16 ,  B01J23/40 ,  B01J37/02 ,  B01J31/28

    Abstract: The coated catalyst is made by impregnating powdered finely divided carrier material with a solution of catalyst precursor, making an aqueous dispersion of impregnated material, coating an inert support with the dispersion, drying and calcining. Production of the coated catalyst comprises: (a) impregnating powdered finely divided materials of large surface area with a solution of catalyst precursors by the method of pore volume impregnation so that the precursors are adsorbed on the material(s); (b) making an aqueous coating dispersion from the mixture; (c) coating an inert support with the dispersion; and (d) drying and calcining the coating.

    70.
    发明专利
    未知

    公开(公告)号：BR9903803A

    公开(公告)日：2000-10-17

    申请号：BR9903803

    申请日：1999-08-19

    Applicant: DEGUSSA

    Inventor： FOERSTER MARTIN ,  PIROH JOSEF ,  SCHLACHTER ULRICH ,  DOMESLE RAINER ,  KRAMPE WILLI

    IPC: B05D7/24 ,  B01J37/02 ,  F01N3/10

    Abstract: The coating dispersion is sucked through the flow channels of a monolithic catalyst support at a rate of 0.1-1 m/s. Excess dispersion is removed from the channels by applying a suction impulse from below. Extraction air is sucked at a rate of 40-1 m/s through the channels and the excess coating dispersion removed from the air stream is removed from the air stream within a time from less than 100 ms after leaving the catalyst support. Process for coating the flow channels of a monolithic cylindrical catalyst support with a coating dispersion comprises vertically directing the cylindrical axis, charging a predetermined amount of dispersion from a storage vessel to the upper front surface of the support, sucking the dispersion through the flow channels, removing excess dispersion from the channels, returning the excess dispersion to the storage vessel and fixing the dispersion by calcining. The coating dispersion is sucked through the flow channels of a monolithic catalyst support at a rate of 0.1-1 m/s. Excess dispersion is removed from the channels by applying a suction impulse from below. Extraction air is sucked at a rate of 40-1 m/s through the channels and the excess coating dispersion removed from the air stream is removed from the air stream within a time from less than 100 ms after leaving the catalyst support.

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