公开(公告)号：US3926565A

公开(公告)日：1975-12-16

申请号：US45051874

申请日：1974-03-12

Applicant: DEGUSSA

Inventor： BIRTIGH GERHARD ,  PARBEL HORST ,  SAUER HEINRICH

IPC: F01N3/28 ,  B01J8/02 ,  B01J35/04 ,  F01N3/15

CPC classification number: F01N3/2842 ,  F01N2260/022

Abstract: An apparatus for cleaning an exhaust gas comprising an elongated housing capable of receiving a catalyst monolith, said housing provided at one end with an exhaust gas entry opening, and provided at the other end with an exhaust gas discharge opening, at least two bridges spaced apart within said housing and attached to said housing, at least one supporting rod for said monolith, said rod secured to one of said bridges and movably mounted on another of said bridges, a monolith catalyst having flow channels and at least one bore for receiving said at least one supporting rod, said bore being provided in the direction of said flow channels, and an elastic intermediate layer surrounding said at least one supporting rod, said catalyst held on said rods by said layer being under pressure. The apparatus is especially useful for cleaning exhaust gases from internal combustion engines.

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.

公开(公告)号：AU737238B2

公开(公告)日：2001-08-16

申请号：AU2034299

申请日：1999-03-10

Applicant: DEGUSSA

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

IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  B05D7/22 ,  B28B11/04 ,  C04B41/45 ,  F01N3/28 ,  B05D7/24 ,  B05C19/04 ,  B05C7/04

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.

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.

公开(公告)号：DE59106875D1

公开(公告)日：1995-12-21

申请号：DE59106875

申请日：1991-02-18

Applicant: DEGUSSA

Inventor： SCHMIDT FELIX DR ,  BAUMGARTNER WILFRIED ,  MANNER REINHARD DR ,  BIRTIGH GERHARD ,  DITTRICH EWALD

IPC: B01J35/04 ,  B01J37/02 ,  B05C3/109 ,  B22F3/26 ,  C04B41/45 ,  C04B41/50 ,  C04B41/85

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.

公开(公告)号：CA2265071C

公开(公告)日：2004-11-16

申请号：CA2265071

申请日：1999-03-09

Applicant: DEGUSSA

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

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

Abstract: A process for the coating of the flow channels of a cylindrical, honeycomb form catalyst carrier with a dispersion coating through filling of the vertically oriented flow channels with a fill quantity of the coating dispersion through the bottom face of the catalyst carrier and subsequent downward emptying and clearance extraction of the flow channels, as well as drying and calcination of the catalyst carrier, by the following steps: a) filling of the flow channels with a fill quantity that is about 10% greater than the empty volume of the flow channels, so that the coating dispersion goes over the upper face of the catalyst carrier after completion of the filling cycle, b) removal of the excess coating dispersion at the top before emptying of the flow channels and c) emptying and clearance extraction of the flow channels through an extraction impulse, which is generated by connection of a vacuum tank with the bottom face of the catalyst carrier, whereby the time between the beginning of the fill cycle and the end of the emptying and clearance extraction amounts to no more than 5 seconds.

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.

公开(公告)号：ES2108051T3

公开(公告)日：1997-12-16

申请号：ES92101204

申请日：1992-01-25

Applicant: DEGUSSA

Inventor： BINDER DIETER DR ,  KLEINSCHMITT PETER DR ,  BIRTIGH GERHARD ,  ZETZMANN KLAUS DR

IPC: B22D41/46 ,  C04B35/653 ,  C21B7/14 ,  F27B14/06 ,  F27D3/14 ,  F27D3/15 ,  F27D25/00 ,  H05B6/24 ,  F27D23/02

Abstract: A method is disclosed for the semi-continuous melting of ceramic material by means of inductive melting in high-frequency and medium-frequency induction melting furnaces whose melting coil surrounds a sintering crust crucible and contains a run-out channel. In tile method, melt is periodically run out and material to be melted is supplied to the crucible so as to replace the material removed preferably so as to maintain a constant level. An intensively cooled channel is used as a run-out device. For the melt broaching, the melt nose is grasped from below by way of an automatically controllable broaching lance of a broaching device and raised. The broaching lance is then advanced between the bottom of the channel and the solidified melt until the sintering crust is pierced. The method permits a reliable and economic management of the process and the maintenance of the quality of the melted products. A device for periodic melt broaching as well as an induction melting furnace equipped with an intensively coolable run-out channel provides apparatus for carrying out the above method.

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.