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1.发明专利
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
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.
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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
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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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
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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公开(公告)号：ZA9901899B
公开(公告)日：1999-09-27
申请号：ZA9901899
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
CPC classification number: B05D7/22 , B01J37/0215
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Patent Agency Ranking
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
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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公开(公告)号：PL331816A1
公开(公告)日：1999-09-13
申请号：PL33181699
申请日：1999-03-08
Applicant: DEGUSSA
Inventor： FOERSTER MARTIN , DITTRICH EWALD , BIRTIGH GERHARD , LEIBOLD WALTER , MERGNER BERND , HOFFMANN MICHAEL , HASSELMANN WOLFGANG , SCHAEFER ROBERT
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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公开(公告)号：CA2265071A1
公开(公告)日：1999-09-10
申请号：CA2265071
申请日：1999-03-09
Applicant: DEGUSSA
Inventor： LEIBOLD WALTER , HOFFMANN MICHAEL , HASSELMANN WOLFGANG , MERGNER BERND , BIRTIGH GERHARD , SCHAEFER ROBERT , DITTRICH EWALD , FOERSTER MARTIN
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.
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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
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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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
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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