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    Process for coating the flow channels in a monolithic catalyst carrier with a coating dispersion
    1.
    发明专利
    Process for coating the flow channels in a monolithic catalyst carrier with a coating dispersion 未知

    公开(公告)号：AU749888B2

    公开(公告)日：2002-07-04

    申请号：AU4455499

    申请日：1999-08-18

    Applicant: DEGUSSA

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

    IPC: B05D7/24 ,  B01J37/02 ,  F01N3/10 ,  B01J37/00

    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.

    Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating.
    4.
    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：ZA991899B

    公开(公告)日：1999-09-27

    申请号：ZA991899

    申请日：1999-03-09

    Applicant: DEGUSSA

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

    IPC: B01J35/04 ,  B01D53/86 ,  B01J37/02 ,  B05D7/22 ,  B28B11/04 ,  C04B41/45 ,  F01N3/28 ,  B01J

    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.

    METHOD OF COATING WITH A FILM-FORMING DISPERSION THE FLOW PASSAGES WITHIN MONOLITHIC BODY OF A CATALYST
    7.
    发明专利
    METHOD OF COATING WITH A FILM-FORMING DISPERSION THE FLOW PASSAGES WITHIN MONOLITHIC BODY OF A CATALYST 未知

    公开(公告)号：PL334969A1

    公开(公告)日：2000-02-28

    申请号：PL33496999

    申请日：1999-08-18

    Applicant: DEGUSSA

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

    IPC: B01J37/02 ,  B05D7/24 ,  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.

    Process for coating the flow of channels in a monolithic catalyst carrier with a coating dispersion.
    8.
    发明专利
    Process for coating the flow of channels in a monolithic catalyst carrier with a coating dispersion. 未知

    公开(公告)号：ZA995303B

    公开(公告)日：2000-02-21

    申请号：ZA995303

    申请日：1999-08-19

    Applicant: DEGUSSA

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

    IPC: B01J37/02 ,  B05D7/24 ,  F01N3/10 ,  B01J

    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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