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    METHOD FOR APPLYING DISPERSION COATING TO FLOW PATH OF CYLINDRICAL HONEYCOMB CATALYST CARRIER
    1.
    发明专利
    METHOD FOR APPLYING DISPERSION COATING TO FLOW PATH OF CYLINDRICAL HONEYCOMB CATALYST CARRIER 失效

    公开(公告)号：JPH11314041A

    公开(公告)日：1999-11-16

    申请号：JP6215599

    申请日：1999-03-09

    Applicant: DEGUSSA

    Inventor： FOERSTER MARTIN DR ,  DITTRICH EWALD ,  BIRTIGH GERHARD ,  LEIBOLD WALTER ,  MERGNER BERND ,  HOFFMANN MICHAEL DR ,  HASSELMANN WOLFGANG ,  SCHAEFER ROBERT

    IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  B05D7/22 ,  B28B11/04 ,  C04B41/45 ,  F01N3/28

    Abstract: PROBLEM TO BE SOLVED: To provide a method for filling a flow path orientated perpendicularly in a cylindrical honeycomb catalyst carrier with a filling amount of coating dispersion through the bottom face of the catalyst carrier, next emptying and performing the clearing extraction of the flow path as well as drying/calcining the catalyst carrier and coating the cylindrical honeycomb catalyst carrier with a dispersion coating. SOLUTION: This method is composed of a) a step to fill a flow path with filling amount which is about 10% larger than the empty volume of the flow path so that a coating dispersion exceeds the upper face of a catalyst carrier after the completion of a filling cycle, b) a step to remove the excess amount of the coating dispersion at the top before the emptying of the flow path and c) a step to empty and perform the clearing extraction by an extraction impulse to be generated by the connection of the bottom face of the catalyst carrier to a vacuum tank. Thus the time between the beginning of the filling cycle and the end of the emptying and clearance extraction amounts to no more than 5 seconds.

    METHOD FOR COATING FLOW ROUTE IN MONOLITHIC CATALYST SUPPORT WITH COATING DISPERSION
    2.
    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.

    METHOD OF PRODUCING NITROGEN OXIDE-OCCLUDING MATERIAL AND OCCLUDING MATERIAL PRODUCED BY THIS METHOD
    3.
    发明专利
    METHOD OF PRODUCING NITROGEN OXIDE-OCCLUDING MATERIAL AND OCCLUDING MATERIAL PRODUCED BY THIS METHOD 失效

    公开(公告)号：JP2001187335A

    公开(公告)日：2001-07-10

    申请号：JP2000346968

    申请日：2000-11-14

    Applicant: DEGUSSA

    Inventor： GOEBEL ULRICH ,  RUWISCH LUTZ MARC ,  KEISLING RALF ,  FOERSTER MARTIN DR

    IPC: B01D53/94 ,  B01J20/06 ,  B01J20/30 ,  B01J23/00 ,  B01J23/02 ,  B01J23/10 ,  B01J23/40 ,  B01J23/63 ,  B01J37/02 ,  B01J37/03 ,  B01J37/08

    Abstract: PROBLEM TO BE SOLVED: To provide a method of producing a nitrogen oxide-occluding material and the nitrogen oxide-occluding material obtained by the same. SOLUTION: The nitrogen oxide-occluding material is constituted of a carrier material selected from the group of a doped cerium oxide, cerium/zircon-mixed oxides and aluminum oxide or mixtures thereof and at least one particulate occluding component of oxides, carbonates or hydroxides of elements of magnesium, strontium, barium, lanthanum and cerium, each being loaded on the carrier material. The method of producing the nitrogen oxide-occluding material comprises suspending a carrier material in an aqueous solution containing a precursor of an occluding component, then introducing the suspension into a hot gas flow and controlling the distribution of the temperature of the hot gas flow so that a solvent of the suspension is allowed to evaporate for a residence time shorter than 1 min in the hot gas flow, the precursor of the occluding component is decomposed by heat and converted into the occluding component, and the occluding material thus formed is separated from the hot gas flow.

    PRODUCTION OF POWDERY HETEROGENEOUS MATERIAL
    4.
    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.

    Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating
    8.
    发明专利
    Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating 未知

    公开(公告)号：MX9902322A

    公开(公告)日：2000-09-30

    申请号：MX9902322

    申请日：1999-03-10

    Applicant: DEGUSSA

    Inventor： FOERSTER MARTIN DR ,  DITTRICH EWALD ,  BIRTIGH GERHARD ,  LEIBOLD WALTER ,  MERGNER BERND ,  HOFFMANN MICHAEL DR ,  HASSELMANN WOLGANG ,  SCHAEFER ROBERT

    IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  B05D7/22 ,  B28B11/04 ,  C04B41/45 ,  F01N3/28

    Abstract: The channels (1) are filled (11) from below, with a quantity up to 10% greater than their empty volume, until the dispersion rises above the upper surface (17). The excess is removed (8, 9) before emptying the channels. Impulsive suction from a low pressure vessel (5) connected with the lower end face of the substrate (1), then clears the passages. The interval between starting to fill and completion of emptying, is no longer than 5 seconds. Preferred Features: The (partial) vacuum vessel (5) has an initial pressure of 150 mbar and a volume 100-1000 times that of the catalyst substrate. During suction, a minimum air velocity of 5 m/s is maintained in the channels. The open flow cross section to the vacuum vessel is adjustable from 0 to a maximum value. When thixotropic or intrinsically-viscous dispersions are used, the interval between filling and sucking-out is so short, that the limit of flowability cannot set in. The substrate is moistened before coating and may be pre-impregnated with acids, bases or salt solutions. Following emptying of the flow channels, before firing, a flow of heated dry air at 50-80 degrees C is passed. This is delivered against the direction of emptying, at a speed of 2-10 m/s, over an interval of 2-60 seconds.

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