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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.

    3.
    发明专利
    未知

    公开(公告)号：TR199900519A2

    公开(公告)日：1999-10-21

    申请号：TR9900519

    申请日：1999-03-10

    Applicant: DEGUSSA

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

    IPC: B01J35/04 ,  B01D53/86 ,  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.

    PROCESS FOR RECEIVING, STORING AND HANDLING ALUMINUM HYDROXIDE WET HYDRATE
    4.
    发明专利
    PROCESS FOR RECEIVING, STORING AND HANDLING ALUMINUM HYDROXIDE WET HYDRATE 未知

    公开(公告)号：CA1156432A

    公开(公告)日：1983-11-08

    申请号：CA354758

    申请日：1980-06-25

    Applicant: DEGUSSA

    Inventor： CHRISTNER HANS ,  ROEBKE WOLFGANG ,  RAMELOW HERMANN ,  DITTRICH EWALD

    IPC: C01B33/26 ,  B01J4/00 ,  C01B39/02 ,  C01F7/02 ,  C01F7/06

    Abstract: There is disclosed a process for receiving, storing and handling aluminum hydroxide wet hydrate, wherein the aluminum hydroxide wet hydrate is unloaded, optionally in batches, by means of a dumping means, e.g., a dump truck into a hopper which is equipped with a conveying means, e.g., a plate conveyor, the aluminum hydroxide wet hydrate supplied by means of a transporting apparatus, e.g., a double belt vertical conveyor, to a weighing means, e.g., a conveyor-type weigher and weighed, subsequently supplied to an aluminum hydroxide wet hydrate suspension tank, mixing the aluminum hydroxide wet hydrate in the tank with the amount of aqueous sodium hydroxide needed to produce a suspension of the aluminum hydroxide wet hydrate and producing a pumpable and meterable suspension of the aluminum hydroxide wet hydrate by heating to a temperature between 20 and 100.degree.C with the aid of a heating element and a stirrer.

    Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating
    6.
    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.

    DEVICE AND PROCESS FOR REMOVING WASHCOAT REMAINING IN THE DUCTS OF NEWLY COATED MONOLITHIC AND HONEYCOMBED CATALYST SUPPORTS AND USE OF SAID DEVICE
    8.
    发明专利
    DEVICE AND PROCESS FOR REMOVING WASHCOAT REMAINING IN THE DUCTS OF NEWLY COATED MONOLITHIC AND HONEYCOMBED CATALYST SUPPORTS AND USE OF SAID DEVICE 未知

    公开(公告)号：CA1330871C

    公开(公告)日：1994-07-26

    申请号：CA590063

    申请日：1989-02-03

    Applicant: DEGUSSA

    Inventor： DITTRICH EWALD ,  MANNER REINHARD ,  BIRTIGH GERHARD ,  SCHMIDT FELIX

    IPC: B01D53/86 ,  B01J37/02 ,  B01J37/06

    Abstract: An apparatus and a method are disclosed for the removal and the recovery of washcoat remaining in the channels of freshly coated monolithic or honeycombed catalytic carriers. The carrier is inserted into a chamber from above and tightly fitted therein at least with the lowest part of the carrier therein. The chamber is fitted with a collection area and a runoff located thereunder. The runoff leads via a shutoff valve into a separation vessel under a vacuum. The opening and closing of the shutoff valve causes air to be aspirated through the carrier channels, which are open at the top or are gradually opened by means of a slotted slide. This action causes the washcoat remnants to he transferred into the separation vessel, where they can be collected in the sump and are then pumped off. The apparatus can be used in systems for manufacturing catalysts for cleaning exhaust gases.

    9.
    发明专利
    未知

    公开(公告)号：DE3023226A1

    公开(公告)日：1981-01-29

    申请号：DE3023226

    申请日：1980-06-21

    Applicant: DEGUSSA

    Inventor： CHRISTNER HANS DR ,  ROEBKE WOLFGANG DR ,  RAMELOW HERMAN ,  DITTRICH EWALD

    IPC: C01B33/26 ,  B01J4/00 ,  C01B39/02 ,  C01F7/02 ,  C01F7/06

    Abstract: There is disclosed a process for receiving, storing and handling aluminum hydroxide wet hydrate, wherein the aluminum hydroxide wet hydrate is unloaded, optionally in batches, by means of a dumping means, e.g., a dump truck into a hopper which is equipped with a conveying means, e.g., a plate conveyor, the aluminum hydroxide wet hydrate supplied by means of a transporting apparatus, e.g., a double belt vertical conveyor, to a weighing means, e.g., a conveyor-type weigher and weighed, subsequently supplied to an aluminum hydroxide wet hydrate suspension tank, mixing the aluminum hydroxide wet hydrate in the tank with the amount of aqueous sodium hydroxide needed to produce a suspension of the aluminum hydroxide wet hydrate and producing a pumpable and meterable suspension of the aluminum hydroxide wet hydrate by heating to a temperature between 20 DEG and 100 DEG C. with the aid of a heating element and a stirrer.

    Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating.
    10.
    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.

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