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    METHOD FOR COATING FLOW ROUTE IN MONOLITHIC CATALYST SUPPORT WITH COATING DISPERSION
    1.
    发明专利
    METHOD FOR COATING FLOW ROUTE IN MONOLITHIC CATALYST SUPPORT WITH COATING DISPERSION 失效

    公开(公告)号：JP2000084417A

    公开(公告)日：2000-03-28

    申请号：JP23423699

    申请日：1999-08-20

    Applicant: DEGUSSA

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

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

    Abstract: PROBLEM TO BE SOLVED: To apply aspiration impact and quickly separate an excess coating dispersion from air current used for aspirating and releasing a catalyst support by vertically orienting a cylindrical axis, supplying a prescribed amount of a coating dispersion to the upper end face of the support from a storage container, passing the dispersion through flow routes by aspiration, removing the excess coating dispersion from the flow routes by opening the flow routes in aspirating condition, turning back the excess dispersion to the storage container, and firmly fixing the dispersion coating by firing. SOLUTION: Flow routes of a catalyst support are coated by passing a coating dispersion at 0.1-1 m/s flow rate by aspiration, removing the excess coating dispersion from the flow routes by applying aspiration impact from a lower side on completion of the passing of the dispersion by aspiration while controlling aspirating air flow rate at 40-1 m/s through the flow routes and removing the excess coating dispersion discharged together with the air flow from the air flow in less than 100 ms after discharge out of the catalyst support.

    OPERATION METHOD OF EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    2.
    发明专利
    OPERATION METHOD OF EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效

    公开(公告)号：JPH11350945A

    公开(公告)日：1999-12-21

    申请号：JP8438999

    申请日：1999-03-26

    Applicant: DEGUSSA

    Inventor： STREHLAU WOLFGANG DR ,  GOEBEL ULRICH ,  LOX EGBERT DR ,  MUELLER WILFRIED ,  DOMESLE RAINER DR

    IPC: B01D53/86 ,  B01D53/94 ,  B01J21/16 ,  F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F01N9/00 ,  F01N13/02 ,  F02D41/02 ,  F02D41/14

    Abstract: PROBLEM TO BE SOLVED: To achieve the operation method of the exhaust emission control device for the internal combustion engine which is operated at lean air/fuel ratio for the main course of its operation. SOLUTION: An exhaust emission control device incorporating a nitrogen oxides storage catalytic converter and a sulfur trap, wherein: a) at the excess air factor higher than 1 and an exhaust gas temperature TK within an activity window ΔTNOX, the nitrogen oxides and the sulfur oxides contained in the exhaust gas are respectively stored on the nitrogen oxides storage catalyst and the sulfur oxides storage catalyst while simultaneously maintaining the exhaust gas temperature TS lower than the desulfurization temperature TS. De SOx and periodically reducing the excess air factor of the exhaust gas below 1 to discharge the stored nitrogen oxides (completion of 1 adsorption cycle); b) after each completion of a predetermined number N1 of cycles of nitrogen oxides adsorption cycle, the exhaust gas temperature TS is raised to a level at or higher than the desulfurization temperature TS. De SOx of the sulfur trap to desulfurize the sulfur trap and to reduce the excess air factor of the exhaust gas to below 1. The process a) and the process b) are periodically repeated.

    EXHAUST EMISSION CONTROL CONVERTER
    3.
    发明专利
    EXHAUST EMISSION CONTROL CONVERTER 失效

    公开(公告)号：JPH10141049A

    公开(公告)日：1998-05-26

    申请号：JP30179297

    申请日：1997-11-04

    Applicant: DEGUSSA

    Inventor： GIESHOFF JUERGEN DR ,  DOMESLE RAINER DR ,  LOX EGBERT DR ,  KREUZER THOMAS DR

    IPC: F01N3/24 ,  F01N3/20 ,  F01N3/28 ,  F01N5/02

    Abstract: PROBLEM TO BE SOLVED: To prevent damage to a catalyst due to high thermal load and arrange a converter near an engine by connecting the wall of a converter, which performs radiative exchange with the end of the catalyst, to at least one heat sink. SOLUTION: A converter with an air-heat exchanger 7 arranged at the end and an exhaust gas inlet tube 2 provided at the side has a converter casing 1 incorporated with a monolith catalyst 4. The air-heat exchanger 7 facing the inflow plane 5 of the catalyst 4 performs radiative exchange, not being substantially disturbed, to cool the inflow plane 5 of the catalyst 4. The monolith catalyst 2 is preferably formed into a disc shape with a largest possible sectional area to improve its heat radiation. As a heat exchanger, a water-heat exchanger instead of the air-heat exchanger can be used. The water-heat exchanger, if used, must be piped and connected to a cooling circuit existing in a vehicle.

    HONEYCOMB BODY MADE FROM CERAMIC
    4.
    发明专利
    HONEYCOMB BODY MADE FROM CERAMIC 失效

    公开(公告)号：JP2002011353A

    公开(公告)日：2002-01-15

    申请号：JP2001143804

    申请日：2001-05-14

    Applicant: DMC2 DEGUSSA METALS CATALYSTS CERDEC AG

    Inventor： DOMESLE RAINER DR ,  KREUZER THOMAS DR ,  LOX EGBERT DR

    IPC: F01N3/28 ,  B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  B28B11/04

    Abstract: PROBLEM TO BE SOLVED: To provide a ceramic honeycomb body for a catalyst for cleaning exhaust gas, which has a cylindrical form provided with first and second end surfaces and a cylindrical outer circumference surface, in which a plurality of passages penetrate in parallel in the axis direction from one end surface to the other, in which the passages formed by passage walls are arranged in a regular pattern over the cross section, of which the center portion is encircled by the outer edge portion of the honeycomb body having the thickness of the plurality of passage diameters, and of which the compression strength is improved in a radius direction. SOLUTION: Ceramic materials of the outer circumference surface of the cylinder and the passage walls in the region of the outer end of the honeycomb body are reinforced by adhering or inserting single or plural inorganic materials to enhance the mechanical stability.

    NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE
    9.
    发明专利
    NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE 失效

    公开(公告)号：JP2000117110A

    公开(公告)日：2000-04-25

    申请号：JP29014699

    申请日：1999-10-12

    Applicant: DEGUSSA

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

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

    Abstract: PROBLEM TO BE SOLVED: To increase a load of a stored compound by a method wherein in a nitrogen oxide storage catalyst containing a fine catalytic material and a nitrogen oxide storage constituent, the nitrogen oxide storage constituent is so provided as to exist as fine barium sulfate and strontium sulfate after end of manufacturing the catalyst. SOLUTION: In a nitrogen oxide storage catalyst wherein a catalyst so structured as to provide a cover 2 on an inactive support 1 to be used for purifying an exhaust gas of a lean engine or the like, contains fine catalytic materials 3, 4 and a nitrogen oxide storing constituent 5, the nitrogen oxide storing constituent 5 is so formed as to exist as fine barium sulfate, and strontium sulfate, after end of manufacturing the catalyst, further a mixture or a mixed crystal of both sulfates, or as a decomposition product having at most 1 μm in average particle size. As the material 3, an activated aluminum oxide activated by use of platinum is used, and as the material 4, a constituent for storing oxygen or cerium/zirconium mixed oxide activated by use of rhodium is used.

    PRODUCTION OF POWDERY HETEROGENEOUS MATERIAL
    10.
    发明专利
    PRODUCTION OF POWDERY HETEROGENEOUS MATERIAL 失效

    公开(公告)号：JP2000061288A

    公开(公告)日：2000-02-29

    申请号：JP13021399

    申请日：1999-05-11

    Applicant: DEGUSSA

    Inventor： FOERSTER MARTIN DR ,  GUTSCH ANDREAS DR ,  DOMESLE RAINER DR ,  KEISLING RALF ,  STOEHR OLIVER

    IPC: B01J2/00 ,  B01J2/04 ,  B01J19/08 ,  B01J19/12 ,  B01J20/02 ,  B01J20/30 ,  B01J32/00 ,  B01J37/00 ,  C01B13/34 ,  C03B19/00 ,  C04B35/622

    Abstract: PROBLEM TO BE SOLVED: To eliminate the loss of powder, to shorten the operation time of a plant and to eliminate risk to the quality of a product by introducing a reaction mixture into a flowing-through pipe, further treating the powder in the pipe and feeding it to a washer, separator or filter. SOLUTION: A dispersion, suspension or emulsion, secondary gas, combustion air and fuel are introduced into a burner 1. The resultant reaction mixture is introduced into a flowing-through pipe 2. An atmosphere of a reducing or oxidizing gas may be established in the flowing-through pipe 2. After passing through the pipe 2, the powder is treated in a washer 3 so as to prepare a dispersion or to prevent contact with air. The powder that leaves the pipe 2 may be separated by a separator 4 for simple treatment at a high temp. or may be separated using a filter 5 for long treatment at a high temp. Waste gas is discharged by a fan 6.

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