公开(公告)号：ZA9100899B

公开(公告)日：1991-11-27

申请号：ZA9100899

申请日：1991-02-06

Applicant: DEGUSSA

Inventor： BRAND REINHOLD ,  REINHOLD BRAND ,  FOERSTER MARTIN ,  MARTIN FOERSTER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  OHMER JOHANNES ,  JOHANNES OHMER ,  ENGLER BERND ,  BERND ENGLER ,  HARTMANN WERNER ,  WERNER HARTMANN ,  KOBERSTEIN EDGAR ,  EDGAR KOBERSTEIN ,  SCHWARZ RUDOLF ,  RUDOLF SCHWARZ

IPC: B01J21/06 ,  B01J35/10 ,  B01J37/00 ,  B28B3/20 ,  C04B35/46 ,  C01G ,  B01J ,  C04B

CPC classification number: B01J21/063 ,  B01J35/1014 ,  B01J35/1038 ,  B01J35/1052 ,  B01J35/1061 ,  B01J37/0009 ,  C04B35/46

公开(公告)号：CA2280597C

公开(公告)日：2008-06-03

申请号：CA2280597

申请日：1999-08-19

Applicant: DEGUSSA

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

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

Abstract: The invention relates to a process for coating the flow channels in a monolithic, cylindrically shaped catalyst carrier with a coating dispersion, wherein the carrier has two end faces which are connected to each other by flow channels arranged parallel to the axis of the cylinder, by vertically aligning the axis of the cylindrical carrier, placing a predetermined amount of coating dispersion from a storage container on the upper end face of the carrier and drawing the dispersion through the flow channels under suction, removing excess coating dispersion from the flow channels by emptying the flow channels under suction, returning the excess dispersion to the storage container and fixing the dispersion coating by calcination. The process is characterised in that the coating dispersion is drawn through the flow channels under suction at a rate of flow of 0.1 to 1 m/s and that after completion of passage under suction the excess coating dispersion is removed from the flow channels by applying a suction impulse from below, wherein the suction air is drawn through the flow channels under suction at a rate of flow between 40 and 1 m/s and the excess coating dispersion discharged with the air stream is separated from the air stream within a time of less than 100 ms after discharge from the catalyst carrier.

公开(公告)号：DE19810260C2

公开(公告)日：2000-02-24

申请号：DE19810260

申请日：1998-03-10

Applicant: DEGUSSA

Inventor： FOERSTER MARTIN ,  DITTRICH EWALD ,  BIRTIGH GERHARD ,  LEIBOLD WALTER ,  MERGNER BERND ,  HOFFMANN MICHAEL ,  HASSELMANN WOLFGANG ,  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：ZA9905303B

公开(公告)日：2000-02-21

申请号：ZA9905303

申请日：1999-08-19

Applicant: DEGUSSA

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

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

CPC classification number: B01J37/0215

公开(公告)号：DE19821144A1

公开(公告)日：1999-11-18

申请号：DE19821144

申请日：1998-05-12

Applicant: DEGUSSA

Inventor： FOERSTER MARTIN ,  GUTSCH ANDREAS ,  DOMESLE RAINER ,  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 ,  B01D43/00 ,  B01J6/00 ,  B01J37/08 ,  B01J37/02 ,  C04B35/626

Abstract: A powdered heterogeneous substance is produced by treating a dispersion, suspension or emulsion in a turbulent or laminar burner under specified conditions, feeding the reaction mixture into a tube where it is further treated and then feeding it to a scrubber, separator or filter for further treatment.

公开(公告)号：DE19810260A1

公开(公告)日：1999-09-16

申请号：DE19810260

申请日：1998-03-10

Applicant: DEGUSSA

Inventor： FOERSTER MARTIN ,  DITTRICH EWALD ,  BIRTIGH GERHARD ,  LEIBOLD WALTER ,  MERGNER BERND ,  HOFFMANN MICHAEL ,  HASSELMANN WOLFGANG ,  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：CA2271818C

公开(公告)日：2006-12-05

申请号：CA2271818

申请日：1999-05-11

Applicant: DEGUSSA

Inventor： FOERSTER MARTIN ,  STOHR OLIVER ,  DOMESLE RAINER ,  GUTSCH ANDREAS ,  KIESSLING RALPH

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

Abstract: A suspension, dispersion or emulsion is introduced into a burner. An optionally two-stage after-treatment is then carried out. The resulting powder can be employed as a catalyst.

公开(公告)号：DE19955456A1

公开(公告)日：2001-05-23

申请号：DE19955456

申请日：1999-11-17

Applicant: DEGUSSA

Inventor： GOEBEL ULRICH ,  RUWISCH LUTZ MARC ,  KIESLING RALPH ,  FOERSTER MARTIN

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

Abstract: Production of a nitrogen oxide storage material comprises suspending the carrier material in an aqueous solution of precursors of the storage components; and introducing the suspension into a hot gas stream. Production of a nitrogen oxide storage material comprising a storage component in the form of particles of an oxide, carbonates or hydroxides of magnesium, strontium, barium, lanthanum and cerium on a carrier material made of cerium oxide, cerium/zirconium mixed oxide or aluminum oxide comprises suspending the carrier material in an aqueous solution of precursors of the storage components; and introducing the suspension into a hot gas stream whose temperature is measured so that during a dwell time of the suspension in the gas stream of a few minutes, the solvent of the suspension is evaporated and the precursors are thermally decomposed and converted into the storage components before the storage material is removed from the stream of hot gas. An Independent claim is also included for the storage material produced.

公开(公告)号：BR9903803A

公开(公告)日：2000-10-17

申请号：BR9903803

申请日：1999-08-19

Applicant: DEGUSSA

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

IPC: B05D7/24 ,  B01J37/02 ,  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.

公开(公告)号：BR9903037A

公开(公告)日：2000-05-09

申请号：BR9903037

申请日：1999-03-10

Applicant: DEGUSSA

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

IPC: B01D53/86 ,  B01J35/04 ,  B01J37/02 ,  B05D7/22 ,  B28B11/04 ,  C04B41/45 ,  F01N3/28 ,  B01J37/025

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.