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196 records (took 0.02 seconds)

    81.
    发明专利
    未知

    公开(公告)号：BR9501094A

    公开(公告)日：1995-10-24

    申请号：BR9501094

    申请日：1995-03-16

    Applicant: DEGUSSA

    Inventor： DOMESLE RAINER ,  ENGLER BERND ,  LOX EGBERT

    IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  C04B41/87 ,  B22F3/24

    Abstract: A process applies a coating to a coating to two honeycomb structures separated by a gap and held in series within the common outer casing of an automotive catalytic converter which has an exhaust gas inlet and an outlet. The novelty is that the first honeycomb is coated by the introduction of a dispersed coating substance through the exhaust gas inlet, the substance penetrating as far as the gap, surplus then being drained. Gas is then forced into the common outer housing through the exhaust gas outlet. The catalytic converter is then reversed. Coating is then applied to the second honeycomb by a repetition of the process, introducing the coating agent through the exhaust gas outlet. The coatings on the honeycomb structures are then fixed by drying and calcination as required.

    CATALYST FOR OXIDATIVE RURIFYING EXHAUST GASES OF DIESEL ENGINES
    82.
    发明专利
    CATALYST FOR OXIDATIVE RURIFYING EXHAUST GASES OF DIESEL ENGINES 未知

    公开(公告)号：HUT69735A

    公开(公告)日：1995-09-28

    申请号：HU9301170

    申请日：1993-04-20

    Applicant: DEGUSSA

    Inventor： ENGLER BERND ,  DOMESLE RAINER ,  LOX EGBERT ,  LEYRER JUERGEN

    IPC: F01N3/10 ,  B01D53/94 ,  B01J23/64 ,  B01J23/648 ,  B01J29/04 ,  B01J35/04 ,  B01J37/00 ,  B01J37/02 ,  F02B3/06 ,  F01N3/28 ,  B01D53/36

    Abstract: The invention relates to a catalyst for the oxidative purification of exhaust gases of diesel engines with a high conversion efficiency for hydrocarbons and carbon monoxide and an inhibited oxidation effect with respect to nitrogen oxides and sulphur dioxide, containing a monolithic catalyst body which has ducts of ceramic or metal, through which free flow is possible, and is coated with an activity-promoting dispersion coating consisting of the finely particulate metal oxides aluminium oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof as a support for the catalytically active components, the active components being present as platinum metals platinum, palladium, rhodium and/or iridium, which are doped with vanadium or are in contact with an oxidic vanadium compound. The reduced oxidation effect with respect to sulphur dioxide is achieved by the finely particulate metal oxides being surface-modified aluminium oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof. The surface modification consists in the specific surface of the metal oxides being coated with a layer consisting of titanium dioxide or silicon dioxide and comprising from 1 to 5 monolayers.

    84.
    发明专利
    未知

    公开(公告)号：FI951244A0

    公开(公告)日：1995-03-16

    申请号：FI951244

    申请日：1995-03-16

    Applicant: DEGUSSA

    Inventor： DOMESLE RAINER ,  ENGLER BERND ,  LOX EGBERT

    IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  C04B41/87 ,  B05D

    Abstract: A process applies a coating to a coating to two honeycomb structures separated by a gap and held in series within the common outer casing of an automotive catalytic converter which has an exhaust gas inlet and an outlet. The novelty is that the first honeycomb is coated by the introduction of a dispersed coating substance through the exhaust gas inlet, the substance penetrating as far as the gap, surplus then being drained. Gas is then forced into the common outer housing through the exhaust gas outlet. The catalytic converter is then reversed. Coating is then applied to the second honeycomb by a repetition of the process, introducing the coating agent through the exhaust gas outlet. The coatings on the honeycomb structures are then fixed by drying and calcination as required.

    87.
    发明专利
    未知

    公开(公告)号：MX9306068A

    公开(公告)日：1994-05-31

    申请号：MX9306068

    申请日：1993-09-30

    Applicant: DEGUSSA

    Inventor： DOMESLE RAINER ,  ENGLER BREND ,  LOX EGBERT

    IPC: B01D53/86 ,  B01D53/94 ,  B01J35/04 ,  B01J37/00 ,  B01J37/02 ,  B21D47/00 ,  F01N3/028 ,  F01N3/28 ,  B01J32/00

    Abstract: Monolithic metal-supported catalysts having a catalytically-coated matrix of a plurality of sheet metal stacks, interwoven with each other, of corrugated, or alternately corrugated and smooth, metal strips, the free ends of which are jointed to an enclosing casing tube of any desired cross-section, can be highly economically produced with excellent thickness uniformity of the layers of the catalytic coating if the sheet metal stacks required for the metal-supported catalyst are assembled from previously coated metal strips cut to length and interwoven with each other to form the matrix, the matrix is then inserted into the casing tube and the free ends of the metal strips are attached to the casing tube by welding.

    89.
    发明专利
    未知

    公开(公告)号：MX26834A

    公开(公告)日：1994-03-31

    申请号：MX2683489

    申请日：1989-02-01

    Applicant: DEGUSSA

    Inventor： DOMESLE RAINER

    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.

    90.
    发明专利
    未知

    公开(公告)号：MX173506B

    公开(公告)日：1994-03-10

    申请号：MX2474291

    申请日：1991-02-28

    Applicant: DEGUSSA

    Inventor： SCHMIDT FELIX ,  MERGNER BERND ,  DOMESLE RAINER

    IPC: B01J23/63 ,  B01J23/56 ,  B01J33/00 ,  B01J37/00 ,  B01J37/02

    Abstract: The thermal shock resistance of monolithic catalysts is improved by pre-coating a ceramic monolithic carrier, before the application of catalytic components, with an organic filling material which can be melted and burned out and which comprises a dispersion of very fine solid particles, by heating the carrier above the melting point of the filling material, then applying the catalytic components and then burning out the filling material.

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