CN1428200A - Method for removing excess maceration extract from honeycomb support catalyst and its equipment - Google Patents
Method for removing excess maceration extract from honeycomb support catalyst and its equipment Download PDFInfo
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- CN1428200A CN1428200A CN 01138910 CN01138910A CN1428200A CN 1428200 A CN1428200 A CN 1428200A CN 01138910 CN01138910 CN 01138910 CN 01138910 A CN01138910 A CN 01138910A CN 1428200 A CN1428200 A CN 1428200A
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- suction nozzle
- honeycomb substrate
- maceration extract
- catalyst
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Abstract
The present invention relates to a method for removing excess impregnation liquor of honeycomb carrier catalyst and its equipment. It adopts a vacuum negative-pressure mode to remove colloidal liquor or liquid, and is characterized by that it makes the linear suction nozzles equidistantly and uniformly scan and pass through one surface of the impregnated honeycomb carrier, then the above-mentioned operation is repeated on the opposite surface of said honeycomb carrier. Said method can effectively and completely remove the excess colloidal liquor or solution, and can completely collect it, so that it can make prepared catalyst have uniform coating layer, and is suitable for continuous production of noble metal catalyst.
Description
Technical field:
The present invention relates to the Preparation of catalysts technology, a kind of removal methods of honeycomb substrate catalyst excess maceration extract is provided especially.
Background technology:
The method of excessive dipping is adopted in the preparation of integral honeycomb carried catalyst usually.The coating of catalyst carrier alumina film, the coating of active constituent is to finish with the method for dipping mostly.As United States Patent (USP) 4,208,454; Chinese patent CN87106740A, CN1054412A, CN1160599A.With the ceramic honey comb is example, in the dipping process of excess liq, because therefore the waller effect in ceramic honey comb duct, has partially liq not flow out naturally, must force to discharge with pump, compressed air or centrifugation method, purges clean at last again with compressed air.Though simple for process, but still have inconvenience, one of the most outstanding drawback is to collect trouble, the liquid loss is more.
Summary of the invention:
The invention provides a kind of removal methods of honeycomb substrate catalyst excess maceration extract, adopt vacuum, negative pressure to remove the mode of glue or liquid, it is characterized in that: make the table plane of linear suction nozzle scanning equidistantly and evenly, again aforesaid operations is repeated on the phase his-and-hers watches plane of this honeycomb substrate by dipping back honeycomb substrate.
The inventive method difference from prior art is to have adopted negative pressure of vacuum to remove technology, can adopt one or several linear suction nozzle, above the ceramic honey comb, below or the side, with excessive liquid sucking-off, because the suction nozzle slit is very little, when at the uniform velocity inswept ceramic honey comb duct, can be with the even sucking-off of unnecessary liquid in the duct, and be collected in the gatherer, the change subtractive process is collection process, the changeable operation of gatherer reaches the quantity-produced purpose.The inventive method method technology is simple, and is easy to operate, is particularly suitable for the production of noble metal catalyst.
The present invention also provides a kind of honeycomb substrate catalyst excess maceration extract that is exclusively used in said method to remove equipment, and it is characterized in that: this equipment is by formations such as suction nozzle (1), gatherer (2), vacuum decompression device (3), transmission devices; Suction nozzle (1) is the duck-beak type structure of triangle cavity, in fact, cavity can be made different geometries, but for the ease of the collection of liquid, reduces or eliminates dead volume, adopt triangle for well, the upper end gap opening width of suction nozzle, than the big 0～5mm of ceramic honey comb diameter, lower end inner chamber width and thickness are than the big 0～5mm of draft tube internal diameter, aperture slots 0.1～the 5.0mm of suction nozzle, the crack ratio of length of the height of suction nozzle and upper end is 0.3～5.0.
Honeycomb substrate catalyst excess maceration extract of the present invention removes in the equipment, and the slit, upper end of suction nozzle (1) is to be single seam, also can be for many seams, generally select single seam for use.Remove disposable the finishing of operation in order to adapt to suitability for industrialized production, to make, can also be with many to suction nozzle (1), the placement of staggering relatively.In order to adapt to the different size of honeycomb substrate, the aperture slots place of suction nozzle (1) can install the aperture adjuster additional.
Utilization the inventive method and equipment are tested the production preparation of noble metal " triple effect " particle catalyst, have obtained gratifying result.The reappearance of coated catalysts sees Table 1.
Table 1 coating test
| Ceramic honey comb | Pottery heavy (g) | Coating weightening finish (g) | Weightening finish (%) |
| ????A | ????399.31 | ????67.41 | ????16.88 |
| ????B | ????400.55 | ????65.23 | ????16.31 |
| ????C | ????394.99 | ????64.69 | ????16.37 |
| ????D * | ????394.28 | ????63.03 | ????15.99 |
*Be the sweeping method preparation
As can be seen from Table 1, prepared catalyst weightening finish is consistent, and preparation technology's favorable reproducibility is described, cuts observation open, and coating is even, has satisfied the requirement of producing preparation, is suitable for industrial production.The catalyst of producing with this kind method and apparatus, through 900 ℃ aging after, carried out catalyst " triple effect " activity rating, appreciation condition is: 400 ℃, air speed 55000h
-1, o'clock (be equivalent to chemically correct fuel A/F=14.7: 1) performance of catalyst sees Table 2 in λ=1.0.
900 ℃ of aged properties of table 2 catalyst
*Catalyst (the catalyst peptization is identical) for the sweeping method preparation
| Catalyst | CO conversion ratio (%) | HC conversion ratio (%) | NO xConversion ratio (%) |
| ????A | ????85.8 | ????100 | ????83.0 |
| ????B | ????82.5 | ????100 | ????87.0 |
| ????C | ????80.8 | ????98.7 | ????88.0 |
| ????D * | ????89.2 | ????91.6 | ????87.0 |
As can be seen from Table 2, the catalyst conversion ratio good reproducibility of the inventive method and device preparation is with the evaluating catalyst of blow-off method preparation basically identical as a result.Therefore, we can say that the inventive method is that ceramic honeycomb catalyst comes unstuck or one of the effective ways of liquid removal.Its advantage is that technology is simple, good reproducibility, and liquid is collected thoroughly, has avoided loss.Be particularly suitable for the preparation of noble metal monolithic ceramic honeycomb catalyst.
Description of drawings:
Fig. 1 connects signal for honeycomb substrate catalyst excess maceration extract removes equipment;
Fig. 2 is the signal of duck-beak type nozzle structure;
Fig. 3 is for inhaling the duty signal of off-square formula I;
Fig. 4 is for inhaling the duty signal of off-square formula II;
Fig. 5 is for inhaling the duty signal of off-square formula III.
The specific embodiment:
Device therefor mainly is made up of duck-beak type suction nozzle (1), gatherer (2), transmission device and vacuum decompression device (3) etc. in the embodiment of the invention, and flow process is seen Fig. 1.The duck-beak type suction nozzle is made by stainless steel as shown in Figure 2, also can be made by aluminium alloy, carbon steel or plastic or other material.Aperture slots a=0.1～5mm; Length (L) is cracked according to the practical big 0～5mm of maximum ceramic honey comb diameter in the upper end; Lower end inner chamber width, identical with the draft tube internal diameter or the big 0.1～5mm of thickness (d); The crack ratio of length (L) of the height of suction nozzle (h) and upper end is 0.3～5.0.Suction nozzle can be fixed on the platen, two adjustable formworks are set on the platen, adjust spacing according to the pottery of different-diameter.If press the pottery of different-diameter, make the suction nozzle of different size, this adjustable module can not wanted.Remove required vacuum or negative pressure, can between 1mmHg～760mmHg, adjust according to the factors such as specification, gelatin viscosity and proportion of pottery; The speed of advancing can be regulated between 0.1～2.0m/min.
Inhale off-square formula I, as shown in Figure 3.
Be fixed on the anchor clamps ceramic honey comb behind the dipping or artificial fixing, suction nozzle is placed in the below of ceramic honey comb, ceramic end identity distance suction nozzle 0～20mm, control suction nozzle pressure 1mmHg～760mmHg, the suction seam of crossing duckbilled with the speed uniform translation of 0.1m～2.0m/min is one time; Overturn 180 ° again translation once be two times, general can inhale for two times take off clean.But preferably inhale for full-bodied glue and to take off more than four times, with till reaching requirement.If require not sternly, do not overturn 180 ° or only inhale that to take off one time all be feasible.Several suction nozzles also can be installed simultaneously together to be inhaled and takes off.
Inhale off-square formula II, as shown in Figure 4.
The duck-beak type suction nozzle is positioned on the top of ceramic honey comb, inhales and takes off process such as mode I.
Inhale the off-square formula III, as shown in Figure 5.
Arranged in dislocation is in the above and below of ceramic honey comb respectively for two duck-beak type suction nozzles, and through passing through the suction nozzle of top behind the suction nozzle of below again, pottery need not overturn 180 ° to ceramic honey comb, has just finished two times suctions and has taken off earlier.If gelatin viscosity is higher, can select two groups or more groups of suction nozzles for use, in the traveling process of pottery, just can finish the multipass suction and take off.
Inhale off-square formula IV.
With mode III difference, promptly behind the suction nozzle of ceramic honey comb elder generation through the top, pass through the suction nozzle of below again, all the other are identical.
Inhale off-square formula V.
The duck-beak type suction nozzle is installed in a side of transmission device, and ceramic honey comb lies on the transmission device, and the duct is vertical with the actuator movement direction.The transmission device translation is finished glue and is removed.
Inhale off-square formula VI.
One group of two suction nozzle arranged in dislocation in the both sides of transmission device, or is installed many groups, remove as mode V.
Inhale off-square formula VII.
As described in mode I～mode VI, different is that ceramic honey comb maintains static, and finishes removing by at the uniform velocity mobile suction nozzle.
Embodiment 1
φ 100mm * 100mm 400 hole/inches
23 catalyst gelatin viscosities of ceramic honey comb, 2800 centipoise d=1.1
Will be on cement dipping machine, the ceramic honey comb behind the dipping is equipped with below being placed on the platen of vacuum slot, and keeps the distance of 1～5mm, vacuum 200～500mmHg, cross suction nozzle with 0.5 meter/minute speed translation after, turn over turnback again translation once promptly finish.The result is as shown in the table:
| Ceramic honey comb | Pottery heavy (g) | Coating weightening finish (g) | Weightening finish (%) |
| ????1 | ????400.05 | ????66.81 | ????16.7 |
| ????2 | ????359.84 | ????67.08 | ????16.9 |
| ????3 | ????402.04 | ????68.34 | ????17.0 |
Embodiment 2
φ 100mm * 100mm 400 hole/inches
23 catalyst gelatin viscosities of ceramic honey comb, 2800 centipoise d=1.1
Will be on cement dipping machine, the ceramic honey comb behind the dipping is fixed on the anchor clamps, vacuum slot is equipped with in the pottery top, and suction nozzle is apart from ceramic upper surface 0.1～1.0mm, vacuum 300～600mmHg, after crossing suction nozzle with 0.5 meter/minute speed translation, turn over turnback again translation once promptly finish.The result is as shown in the table:
| Ceramic honey comb | Pottery heavy (g) | Coating weightening finish (g) | Weightening finish (%) |
| ????1 | ????396.42 | ????65.01 | ????16.4 |
| ????2 | ????405.01 | ????67.16 | ????16.6 |
| ????3 | ????400.22 | ????63.52 | ????15.9 |
Embodiment 3
φ 100mm * 100mm 400 hole/inches
23 catalyst gelatin viscosities of ceramic honey comb, 2800 centipoise d=1.1
Will be on cement dipping machine, the ceramic honey comb behind the dipping, lying low is fixed on the anchor clamps, one side is vertically installed vacuum slot, and suction nozzle is apart from pottery end face distance 0.5～2mm, vacuum 300～500mmHg, after crossing suction nozzle with 0.5 meter/minute speed translation, turn over turnback again translation once promptly finish.The result is as shown in the table:
| Ceramic honey comb | Pottery heavy (g) | Coating weightening finish (g) | Weightening finish (%) |
| ????1 | ????401.15 | ????63.88 | ????15.9 |
| ????2 | ????394.28 | ????65.13 | ????16.5 |
| ????3 | ????389.54 | ????65.06 | ????16.7 |
Claims (6)
1, a kind of removal methods of honeycomb substrate catalyst excess maceration extract, adopt vacuum, negative pressure to remove the mode of glue or liquid, it is characterized in that: make the table plane of linear suction nozzle scanning equidistantly and evenly, again aforesaid operations is repeated on the phase his-and-hers watches plane of this honeycomb substrate by dipping back honeycomb substrate.
2, a kind of honeycomb substrate catalyst excess maceration extract that is exclusively used in the described method of claim 1 removes equipment, it is characterized in that: this equipment is by formations such as suction nozzle (1), gatherer (2), vacuum decompression device (3), transmission devices; Suction nozzle (1) is the duck-beak type structure of triangle cavity, the upper end gap opening width of suction nozzle, than the big 0～5mm of ceramic honey comb diameter, lower end inner chamber width and thickness are than the big 0～5mm of draft tube internal diameter, aperture slots 0.1～the 5.0mm of suction nozzle, the crack ratio of length of the height of suction nozzle and upper end is 0.3～5.0.
3, remove equipment according to the described honeycomb substrate catalyst excess of claim 2 maceration extract, it is characterized in that: the slit, upper end of suction nozzle (1) is single seam.
4, remove equipment according to the described honeycomb substrate catalyst excess of claim 2 maceration extract, it is characterized in that: many to suction nozzle (1), the placement of staggering relatively.
5, remove equipment according to the described honeycomb substrate catalyst excess of claim 2 maceration extract, it is characterized in that: the aperture slots place of suction nozzle (1), install the aperture adjuster additional.
6, remove equipment according to the described honeycomb substrate catalyst excess of claim 2 maceration extract, it is characterized in that: suction nozzle is by stainless steel, carbon steel, aluminium alloy, and plastics or other composite are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011389109A CN1171681C (en) | 2001-12-25 | 2001-12-25 | Method for removing excess maceration extract from honeycomb support catalyst and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011389109A CN1171681C (en) | 2001-12-25 | 2001-12-25 | Method for removing excess maceration extract from honeycomb support catalyst and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1428200A true CN1428200A (en) | 2003-07-09 |
| CN1171681C CN1171681C (en) | 2004-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011389109A Expired - Fee Related CN1171681C (en) | 2001-12-25 | 2001-12-25 | Method for removing excess maceration extract from honeycomb support catalyst and its equipment |
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| Country | Link |
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| CN (1) | CN1171681C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107961813A (en) * | 2016-10-19 | 2018-04-27 | 中国科学院大连化学物理研究所 | The method for improving exhaust gas from diesel vehicle denitration molecular sieve monolithic catalyst coating uniformity |
| CN108906139A (en) * | 2018-07-03 | 2018-11-30 | 贵州德润环保产业有限公司 | A kind of denitrating catalyst regeneration method |
-
2001
- 2001-12-25 CN CNB011389109A patent/CN1171681C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107961813A (en) * | 2016-10-19 | 2018-04-27 | 中国科学院大连化学物理研究所 | The method for improving exhaust gas from diesel vehicle denitration molecular sieve monolithic catalyst coating uniformity |
| CN108906139A (en) * | 2018-07-03 | 2018-11-30 | 贵州德润环保产业有限公司 | A kind of denitrating catalyst regeneration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1171681C (en) | 2004-10-20 |
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