公开(公告)号：TR9900519A2

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

CPC classification number: B05D7/22 ,  B01J37/0215

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.